☆ 4.8 Review

Advancing homogeneous catalysis for parahydrogen-derived hyperpolarisation and its NMR applications

CHEMICAL SCIENCE (2022)

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Review Chemistry, Analytical

Instrumentation for Hydrogenative Parahydrogen-Based Hyperpolarization Techniques

Andreas B. Schmidt et al.

ANALYTICAL CHEMISTRY (2022)

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Article Chemistry, Applied

Effect of the hydrogenation solvent in the PHIP-SAH hyperpolarization of [1-13C]pyruvate

O. Bondar et al.

Summary: ParaHydrogen Induced Polarization-Side Arm Hydrogenation (PHIP-SAH) is an inexpensive tool for obtaining hyperpolarized pyruvate for in vivo diagnostics. The solvent used in the hydrogenation process can affect efficiency and hyperpolarization level. Coordinating solvents can significantly increase efficiency or hyperpolarization level, but may not be compatible with metabolic applications. The extraction of hyperpolarized product in an aqueous solution can improve biocompatibility by removing traces of organic solvents.

CATALYSIS TODAY (2022)

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Article Chemistry, Multidisciplinary

Temperature Cycling Enables Efficient 13C SABRE-SHEATH Hyperpolarization and Imaging of [1-13C]-Pyruvate

Patrick TomHon et al.

Summary: This study introduces a temperature cycling method for SABRE-SHEATH that enables >10% polarization on [1-C-13]-pyruvate, sufficient for successful in vivo experiments. By using SABRE catalyst-bound pyruvate at lower temperatures, approximately 20% polarization is accumulated and released into free pyruvate at elevated temperatures. A kinetic model of differential equations is developed to explain this effect and characterize critical relaxation and buildup parameters, demonstrating the combination of inexpensive hyperpolarization methods with low-cost MRI systems to achieve a broadly available, yet highly sensitive metabolic imaging platform.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

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Article Multidisciplinary Sciences

Improving SABRE hyperpolarization with highly nonintuitive pulse sequences: Moving beyond avoided crossings to describe dynamics

Shannon L. Eriksson et al.

Summary: Theoretical framework focusing on avoided crossings can lead SABRE and X-SABRE experiments away from optimal solutions. By strategically controlling pulse sequences with field values far from LACs and using different terms in the effective Hamiltonian, substantial signal enhancements can be achieved under nonintuitive conditions.

SCIENCE ADVANCES (2022)

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Article Biochemistry & Molecular Biology

Magnetic Resonance Signal Amplification by Reversible Exchange of Selective PyFALGEA Oligopeptide Ligands Towards Epidermal Growth Factor Receptors

Tomasz Ratajczyk et al.

Summary: The biorelevant PyFALGEA oligopeptide ligand has been successfully utilized in SABRE experiments for signal amplification, with its interaction with the iridium catalyst influencing the efficiency of hyperpolarization. Steric hindrance caused by the bulky phenylalanine in the PyFALGEA oligopeptide can hinder hyperpolarization, highlighting the importance of optimizing the molecular structures for efficient hyperpolarization. Additionally, a unique NMR pattern in the hydride region observed during SABRE experiments with PyFALGEA and IMesBn can serve as a fingerprint for this oligopeptide.

CHEMBIOCHEM (2021)

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Article Biochemical Research Methods

SABRE and PHIP pumped RASER and the route to chaos

Stephan Appelt et al.

Summary: RASER is a system where the fast relaxing electromagnetic modes of an LC resonator are controlled by the slow nuclear spin motion, and its spectral properties can be predicted through mathematical modeling, potentially exhibiting phenomena such as frequency combs and mode collapse. Experimental observations include RASER revivals.

JOURNAL OF MAGNETIC RESONANCE (2021)

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Article Chemistry, Physical

Catalytic Hydrogenation of Trivinyl Orthoacetate: Mechanisms Elucidated by Parahydrogen Induced Polarization

Andrey N. Pravdivtsev et al.

Summary: The study found that in the process of hydrogenation and hyperpolarization using parahydrogen (pH(2)) induced polarization (PHIP) in biochemical applications, multiple vinyl ester groups lead to rapid decomposition and the generation of side reactions.

CHEMPHYSCHEM (2021)

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Article Chemistry, Physical

Reversible Hyperpolarization of Ketoisocaproate Using Sulfoxide-containing Polarization Transfer Catalysts

Ben. J. Tickner et al.

Summary: The study expanded the application scope of sulfoxide-containing magnetization transfer catalysts, achieving enhanced magnetic polarization transfer, particularly most efficient in lower magnetic fields.

CHEMPHYSCHEM (2021)

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Editorial Material Chemistry, Physical

Density Functional Theory Study of Reaction Equilibria in Signal Amplification by Reversible Exchange

Kailai Lin et al.

CHEMPHYSCHEM (2021)

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Review Chemistry, Multidisciplinary

Parahydrogen-Induced Polarization of Amino Acids

Andrey N. Pravdivtsev et al.

Summary: Nuclear magnetic resonance (NMR) is widely used in biochemical and biomedical research, with hyperpolarization expanding its applications. Parahydrogen (pH(2)) offers a fast and cost-efficient way for hyperpolarization, leading to a growing interest in hyperpolarized molecules like amino acids.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Physical

Hyperpolarized 13C Magnetic Resonance Imaging of Fumarate Metabolism by Parahydrogen-induced Polarization: A Proof-of-Concept in vivo Study

Neil J. Stewart et al.

Summary: A cost-effective synthetic pathway for high-yield hydrogenation precursor was developed, with the trans-selectivity of the hydrogenation reaction elucidated using density functional theory simulations. The study successfully demonstrated the generation of hyperpolarized [1-C-13]fumarate through a simple PHIP set-up, allowing for ex vivo detection in murine liver tissue homogenates and in vivo MR spectroscopy and imaging in a murine model of acetaminophen-induced hepatitis.

CHEMPHYSCHEM (2021)

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Review Radiology, Nuclear Medicine & Medical Imaging

Hydrogenative-PHIP polarized metabolites for biological studies

Francesca Reineri et al.

Summary: ParaHydrogen induced polarization (PHIP) is an efficient and cost-effective hyperpolarization method, but faces challenges in biological investigations due to chemical limitations. Recent advancements in hydrogenative PHIP (h-PHIP) have expanded the possibilities of hyperpolarizing metabolites, offering new opportunities for biological applications.

MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE (2021)

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Article Chemistry, Physical

Cobalt-Catalyzed Hyperpolarization of Structurally Intact Olefins

Safiyah R. Muhammad et al.

Summary: SABRE is a tool that generates hyperpolarized species through non-hydrogenative interactions between parahydrogen and selected nitrogen-/oxygen-/sulfur-containing substrates, traditionally with an iridium catalyst. The use of a cobalt-based catalyst has been reported for the hyperpolarization of intact olefins, demonstrating significant signal enhancement without the need for isotopic labeling or radio-frequency pulse sequences. This development provides insights into a new first-row transition metal catalyst platform capable of enhancing signal intensity for structurally intact substrates.

ACS CATALYSIS (2021)

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Review Chemistry, Physical

Heterogeneous Catalysis and Parahydrogen-Induced Polarization

Ekaterina V. Pokochueva et al.

Summary: HET-PHIP has attracted significant research attention in recent years, showing major prospects for applications in biomedical MRI and industrial catalytic studies, despite the current need for further improvement in NMR signal enhancements.

CHEMPHYSCHEM (2021)

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Article Chemistry, Physical

Hyperpolarization Effects in Parahydrogen Activation with Pnictogen Biradicaloids: Metal-free PHIP and SABRE

Vladimir V. Zhivonitko et al.

Summary: The activation of parahydrogen by 4- and 5-membered pnictogen biradicaloids has been studied, allowing for observation of strong nuclear spin hyperpolarization effects in H-1 and P-31 NMR experiments. Reversible activation of H-2 was demonstrated by 4-membered biradicaloids, leading to SABRE hyperpolarization, while 5-membered biradicaloids showed irreversible parahydrogen activation.

CHEMPHYSCHEM (2021)

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Article Multidisciplinary Sciences

Rapid hyperpolarization and purification of the metabolite fumarate in aqueous solution

Stephan Knecht et al.

Summary: This study discusses the techniques of hyperpolarizing fumarate using dissolution dynamic nuclear polarization and parahydrogen-induced polarization, as well as the method of purifying pure solid fumarate from impurities through acid precipitation.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2021)

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Article Chemistry, Analytical

Developing Analytical Applications for Parahydrogen Hyperpolarization: Urinary Elimination Pharmacokinetics of Nicotine

Nele Reimets et al.

Summary: Nuclear magnetic resonance spectroscopy (NMR) is a valuable analytical tool with applications in various research fields, but it may face challenges in detecting compounds at minute concentrations in biofluids. This study demonstrates how parahydrogen hyperpolarization can overcome the sensitivity barrier of NMR, allowing for the detection of mid-nanomolar concentrations of drugs and metabolites. The method shows promise for precise quantitative and qualitative analysis in practical pharmacokinetics scenarios.

ANALYTICAL CHEMISTRY (2021)

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Article Chemistry, Inorganic & Nuclear

Nickel(II) Dihydrogen and Hydride Complexes as the Intermediates of H2 Heterolytic Splitting by Nickel Diazadiphosphacyclooctane Complexes

Nikolay V. Kireev et al.

Summary: A series of complexes [Ni((P2N2R2)-N-R1)(2)](2+) can interact with H-2 reversibly, producing products capable of heterolytic splitting of dihydrogen. Experiments with parahydrogen revealed the presence of the short-lived non-classical intermediate 3-H-2 in the nickel dihydrogen complex, which has so far only been identified computationally.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (2021)

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Article Chemistry, Multidisciplinary

Parahydrogen-Induced Polarization Relayed via Proton Exchange

Kolja Them et al.

Summary: The method described combines direct parahydrogenation with polarization transfer, achieving high polarization of H-1 that can be relayed to various target molecules via proton exchange. Water and alcohols also reached high levels of polarization even at high concentrations.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Hyperpolarisation of weakly binding N-heterocycles using signal amplification by reversible exchange†

Peter J. Rayner et al.

Summary: SABRE is a catalytic method that enhances the sensitivity of molecular detection by binding target substrates and para-hydrogen to a metal center. A simple co-ligand strategy overcomes the issue of weak binding with sterically large substrates, allowing for significant increase in signal size and efficiency of the catalysts.

CHEMICAL SCIENCE (2021)

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Article Chemistry, Inorganic & Nuclear

Exploring the hyperpolarisation of EGTA-based ligands using SABRE

Ben J. Tickner et al.

Summary: This study focuses on the design of molecules that can report on their biological environment through their magnetic resonance signals, with a specific interest in hyperpolarization techniques for enhanced sensitivity. The synthesized EGTA-derived molecules, containing pyridyl rings for reversible ligation to an iridium dihydride complex, are investigated for their hyperpolarization potential through the SABRE process. The results show the importance of the proximity of EGTA and pyridine units, as well as the identity of the linker group, in achieving optimal hyperpolarization for MR imaging.

DALTON TRANSACTIONS (2021)

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Article Quantum Science & Technology

Micron-Scale NV-NMR Spectroscopy with Signal Amplification by Reversible Exchange

Nithya Arunkumar et al.

Summary: The study demonstrates an increase in NV-NMR proton concentration sensitivity by hyperpolarizing sample proton spins to about 0.5% through signal amplification by reversible exchange (SABRE), enabling micron-scale NMR spectroscopy of small-molecule sample concentrations as low as 1 mM in picoliter volumes. The SABRE-enhanced NV-NMR technique may enable detection and chemical analysis of low-concentration molecules and their dynamics in complex micron-scale systems such as single cells.

PRX QUANTUM (2021)

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Article Chemistry, Analytical

Pulse-Programmable Magnetic Field Sweeping of Parahydrogen-Induced Polarization by Side Arm Hydrogenation

Baptiste Joalland et al.

ANALYTICAL CHEMISTRY (2020)

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Article Chemistry, Applied

Pairwise Parahydrogen Addition Over Molybdenum Carbide Catalysts

Dudari B. Burueva et al.

TOPICS IN CATALYSIS (2020)

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Article Chemistry, Physical

Remarkable Levels of 15N Polarization Delivered through SABRE into Unlabeled Pyridine, Pyrazine, or Metronidazole Enable Single Scan NMR Quantification at the mM Level

Marianna Fekete et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2020)

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Article Chemistry, Physical

Hyperpolarized Magnetic Resonance of Exchangeable Protons Using Parahydrogen and Aminosilane

Ewoud Vaneeckhaute et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2020)

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Article Chemistry, Analytical

Using SABRE Hyperpolarized 13C NMR Spectroscopy to Interrogate Organic Transformations of Pyruvate

Ben J. Tickner et al.

ANALYTICAL CHEMISTRY (2020)

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Article Chemistry, Analytical

Organic Reaction Monitoring of a Glycine Derivative Using Signal Amplification by Reversible Exchange-Hyperpolarized Benchtop Nuclear Magnetic Resonance Spectroscopy

Heelim Chae et al.

ANALYTICAL CHEMISTRY (2020)

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Article Chemistry, Physical

Nuclear Spin Hyperpolarization of NH2- and CH3-Substituted Pyridine and Pyrimidine Moieties by SABRE

Ratnamala Mandal et al.

CHEMPHYSCHEM (2020)

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Article Chemistry, Multidisciplinary

A Zwitterionic Phosphonium Stannate(II) via Hydrogen Splitting by a Sn/P Frustrated Lewis-Pair and Reductive Elimination

Philipp Holtkamp et al.

CHEMISTRY-A EUROPEAN JOURNAL (2020)

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Article Chemistry, Multidisciplinary

Catalytic hydrogenation with parahydrogen: a bridge from homogeneous to heterogeneous catalysis

Kirill Kovtunov et al.

PURE AND APPLIED CHEMISTRY (2020)

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Article Chemistry, Physical

Theoretical description of hyperpolarization formation in the SABRE-relay method

Stephan Knecht et al.

JOURNAL OF CHEMICAL PHYSICS (2020)

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Article Chemistry, Physical

Spin dynamics in experiments on orthodeuterium induced polarization (ODIP)

Vitaly P. Kozinenko et al.

JOURNAL OF CHEMICAL PHYSICS (2020)

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High-Pressure Clinical-Scale 87% Parahydrogen Generator

Jonathan R. Birchall et al.

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Tunable iridium catalyst designs with bidentate N-heterocyclic carbene ligands for SABRE hyperpolarization of sterically hindered substrates

Pierce Pham et al.

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Optimisation of pyruvate hyperpolarisation using SABRE by tuning the active magnetisation transfer catalyst

Ben. J. Tickner et al.

CATALYSIS SCIENCE & TECHNOLOGY (2020)

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Article Chemistry, Multidisciplinary

Rational ligand choice extends the SABRE substrate scope

Johannes F. P. Colell et al.

CHEMICAL COMMUNICATIONS (2020)

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Article Chemistry, Physical

A role for low concentration reaction intermediates in the signal amplification by reversible exchange process revealed by theory and experiment

Marianna Fekete et al.

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Article Chemistry, Physical

Metabolic Studies of Tumor Cells Using [1-13C] Pyruvate Hyperpolarized by Means of PHIP-Side Arm Hydrogenation

Eleonora Cavallari et al.

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Iridium α-Carboxyimine Complexes Hyperpolarized with para-Hydrogen Exist in Nuclear Singlet States before Conversion into Iridium Carbonates

Ben. J. Tickner et al.

CHEMPHYSCHEM (2019)

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Article Chemistry, Physical

Efficient conversion of anti-phase spin order of protons into 15N magnetisation using SLIC-SABRE

Stephan Knecht et al.

MOLECULAR PHYSICS (2019)

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Article Physics, Atomic, Molecular & Chemical

Substituent Influences on the NMR Signal Amplification of Ir Complexes with Heterocyclic Carbene Ligands

Sara Hadjiali et al.

APPLIED MAGNETIC RESONANCE (2019)

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Article Chemistry, Analytical

Reaction Monitoring Using SABRE-Hyperpolarized Benchtop (1 T) NMR Spectroscopy

Olga Semenova et al.

ANALYTICAL CHEMISTRY (2019)

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Article Chemistry, Physical

A Simple and Efficient Procedure for Rh(I)- and Ir(I)-complex Catalyzed Para-hydrogenation of Alkynes and Alkenes in Aqueous Media Resulting in Strong PHIP Effects

Gabor Papp et al.

CHEMCATCHEM (2019)

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Article Chemistry, Multidisciplinary

Ultrafast Single-Scan 2D NMR Spectroscopic Detection of a PHIP-Hyperpolarized Protease Inhibitor

Alexey S. Kiryutin et al.

CHEMISTRY-A EUROPEAN JOURNAL (2019)

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SABRE: Chemical kinetics and spin dynamics of the formation of hyperpolarization

Danila A. Barskiy et al.

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Article Chemistry, Physical

Indirect Detection of Short-Lived Hydride Intermediates of Iridium N-Heterocyclic Carbene Complexes via Chemical Exchange Saturation Transfer Spectroscopy

Stephan Knecht et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2019)

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Article Chemistry, Physical

Low-Concentration Measurements of Nuclear Spin-Induced Optical Rotation Using SABRE Hyperpolarization

Petr Stepanek et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2019)

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Article Biochemical Research Methods

Decoupled LIGHT-SABRE variants allow hyperpolarization of asymmetric SABRE systems at an arbitrary field

Jacob R. Lindale et al.

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Probing the Hydrogenation of Vinyl Sulfoxides Using para-Hydrogen

Ben J. Tickner et al.

ORGANOMETALLICS (2019)

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Article Chemistry, Physical

Single-Scan Diffusion-Ordered NMR Spectroscopy of SABRE-Hyperpolarized Mixtures

Ludmilla Guduff et al.

CHEMPHYSCHEM (2019)

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Article Radiology, Nuclear Medicine & Medical Imaging

Cryogen-free dissolution dynamic nuclear polarization polarizer operating at 3.35 T, 6.70 T, and 10.1 T

Jan Henrik Ardenkjaer-Larsen et al.

MAGNETIC RESONANCE IN MEDICINE (2019)

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Article Biochemical Research Methods

Polarization of low-γ nuclei by transferring spin order of parahydrogen at high magnetic fields

Vitaly P. Kozinenko et al.

JOURNAL OF MAGNETIC RESONANCE (2019)

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Article Chemistry, Multidisciplinary

Real-Time Nuclear Magnetic Resonance Detection of Fumarase Activity Using Parahydrogen-Hyperpolarized [1-13C]Fumarate

James Eills et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

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Using para hydrogen induced polarization to study steps in the hydroformylation reaction

Dexin Guan et al.

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Structural exploration of rhodium catalysts and their kinetic studies for efficient parahydrogen-induced polarization by side arm hydrogenation

Marino Itoda et al.

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Parahydrogen induced hyperpolarization provides a tool for NMR metabolomics at nanomolar concentrations

Lisanne Sellies et al.

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Article Chemistry, Multidisciplinary

Using coligands to gain mechanistic insight into iridium complexes hyperpolarized with para-hydrogen

Ben J. Tickner et al.

CHEMICAL SCIENCE (2019)

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Article Chemistry, Multidisciplinary

Relayed hyperpolarization from para-hydrogen improves the NMR detectability of alcohols

Peter J. Rayner et al.

CHEMICAL SCIENCE (2019)

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Article Chemistry, Physical

Parahydrogen-induced polarization with a metal-free P-P biradicaloid

Vladimir V. Zhivonitko et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2019)

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Article Chemistry, Inorganic & Nuclear

Mechanistic insight into novel sulfoxide containing SABRE polarisation transfer catalysts

Ben. J. Tickner et al.

DALTON TRANSACTIONS (2019)

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Article Chemistry, Multidisciplinary

Rapid 13C NMR hyperpolarization delivered from para-hydrogen enables the low concentration detection and quantification of sugars

Peter M. Richardson et al.

CHEMICAL SCIENCE (2019)

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Extending the Scope of 19F Hyperpolarization through Signal Amplification by Reversible Exchange in MRI and NMR Spectroscopy

Alexandra M. Olaru et al.

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Parahydrogen-Based Hyperpolarization for Biomedicine

Jan-Bernd Hoevener et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2018)

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Review Chemistry, Multidisciplinary

Signal Amplification by Reversible Exchange (SABRE): From Discovery to Diagnosis

Peter J. Rayner et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2018)

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Review Chemistry, Multidisciplinary

Hyperpolarized NMR Spectroscopy: d-DNP, PHIP, and SABRE Techniques

Kirill V. Kovtunov et al.

CHEMISTRY-AN ASIAN JOURNAL (2018)

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Article Biochemical Research Methods

Re-polarization of nuclear spins using selective SABRE-INEPT

Stephan Knecht et al.

JOURNAL OF MAGNETIC RESONANCE (2018)

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Article Biochemical Research Methods

Studies to enhance the hyperpolarization level in PHIP-SAH-produced C13-pyruvate

Eleonora Cavallari et al.

JOURNAL OF MAGNETIC RESONANCE (2018)

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Article Chemistry, Physical

Parahydrogen-Induced Polarization Study of the Silica-Supported Vanadium Oxo Organometallic Catalyst

Vladimir V. Zhivonitko et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2018)

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Spontaneous 15N Nuclear Spin Hyperpolarization in Metal-Free Activation of Parahydrogen by Molecular Tweezers

Kristina Sorochkina et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2018)

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Article Chemistry, Multidisciplinary

Half-Sandwich Ruthenium Carbene Complexes Link trans-Hydrogenation and gem-Hydrogenation of Internal Alkynes

Alexandre Guthertz et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2018)

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Article Chemistry, Multidisciplinary

Complete magnetic field dependence of SABRE-derived polarization

Alexey S. Kiryutin et al.

MAGNETIC RESONANCE IN CHEMISTRY (2018)

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Direct and indirect hyperpolarisation of amines using parahydrogen

Wissam Iali et al.

CHEMICAL SCIENCE (2018)

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Using parahydrogen to hyperpolarize amines, amides, carboxylic acids, alcohols, phosphates, and carbonates

Wissam Iali et al.

SCIENCE ADVANCES (2018)

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F-19 Hyperpolarization of N-15-3-F-19-Pyridine via Signal Amplification by Reversible Exchange

Nikita V. Chukanov et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2018)

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Article Chemistry, Physical

Harnessing asymmetric N-heterocyclic carbene ligands to optimise SABRE hyperpolarisation

Chin Min Wong et al.

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Quasi-Resonance Signal Amplification by Reversible Exchange

Thomas Theis et al.

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Unlocking a Diazirine Long-Lived Nuclear Singlet State via Photochemistry: NMR Detection and Lifetime of an Unstabilized Diazo-Compound

Barbara Procacci et al.

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C-13 NMR Signal Enhancement Using Parahydrogen-Induced Polarization Mediated by a Cobalt Hydrogenation Catalyst

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Hyperpolarized fumarate via parahydrogen

Barbara Ripka et al.

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13C MR Hyperpolarization of Lactate by Using ParaHydrogen and Metabolic Transformation in Vitro

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Generalizing, Extending, and Maximizing Nitrogen-15 Hyperpolarization Induced by Parahydrogen in Reversible Exchange

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Long-Lived 13C2 Nuclear Spin States Hyperpolarized by Parahydrogen in Reversible Exchange at Microtesla Fields

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Cobalt-Catalyzed and Lewis Acid-Assisted Nitrile Hydrogenation to Primary Amines: A Combined Effort

Kenan Tokmic et al.

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Polarization transfer efficiency in PHIP experiments

M. Emondts et al.

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Following palladium catalyzed methoxycarbonylation by hyperpolarized NMR spectroscopy: a parahydrogen based investigation

Dexin Guan et al.

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SQUID-based detection of ultra-low-field multinuclear NMR of substances hyperpolarized using signal amplification by reversible exchange

K. Buckenmaier et al.

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Article Chemistry, Physical

Hyperpolarizing Water with Parahydrogen

Soeren Lehmkuhl et al.

CHEMPHYSCHEM (2017)

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Toward Hyperpolarized 19F Molecular Imaging via Reversible Exchange with Parahydrogen

Roman V. Shchepin et al.

CHEMPHYSCHEM (2017)

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Article Chemistry, Analytical

Aqueous Ligand-Stabilized Palladium Nanoparticle Catalysts for Parahydrogen-Induced 13C Hyperpolarization

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Iridium Cyclooctene Complex That Forms a Hyperpolarization Transfer Catalyst before Converting to a Binuclear C-H Bond Activation Product Responsible for Hydrogen Isotope Exchange

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Determination of long-range scalar 1H-1H coupling constants responsible for polarization transfer in SABRE

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Aqueous NMR Signal Enhancement by Reversible Exchange in a Single Step Using Water-Soluble Catalysts

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Alkyne Semihydrogenation with a Well-Defined Nonclassical Co-H2 Catalyst: A H2 Spin on Isomerization and E-Selectivity

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Well-Defined Cobalt(I) Dihydrogen Catalyst: Experimental Evidence for a Co(I)/Co(III) Redox Process in Olefin Hydrogenation

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Nuclear spin hyperpolarization with ansa-aminoboranes: a metal-free perspective for parahydrogen-induced polarization

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A simple analytical model for signal amplification by reversible exchange (SABRE) process

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Photochemical pump and NMR probe to monitor the formation and kinetics of hyperpolarized metal dihydrides

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15N Hyperpolarization of Imidazole-15N2 for Magnetic Resonance pH Sensing via SABRE-SHEATH

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Direct and cost-efficient hyperpolarization of long-lived nuclear spin states on universal 15N2-diazirine molecular tags

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2D NMR Trace Analysis by Continuous Hyperpolarization at High Magnetic Field

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Strong P-31 nuclear spin hyperpolarization produced via reversible chemical interaction with parahydrogen

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Single-Scan Multidimensional NMR Analysis of Mixtures at Sub-Millimolar Concentrations by using SABRE Hyperpolarization

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Application of the π-accepting ability parameter of N-heterocyclic carbene ligands in iridium complexes for signal amplification by reversible exchange (SABRE)

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The reaction of an iridium PNP complex with parahydrogen facilitates polarisation transfer without chemical change

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Utilisation of water soluble iridium catalysts for signal amplification by reversible exchange

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Spin polarization transfer mechanisms of SABRE: A magnetic field dependent study

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Strategies for the Hyperpolarization of Acetonitrile and Related Ligands by SABRE

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Effects of Magnetic Field Cycle on the Polarization Transfer from Parahydrogen to Heteronuclei through Long-Range J-Couplings

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RF-SABRE: A Way to Continuous Spin Hyperpolarization at High Magnetic Fields

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Improving the Hyperpolarization of 31P Nuclei by Synthetic Design

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15N Hyperpolarization by Reversible Exchange Using SABRE-SHEATH

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Microtesla SABRE Enables 10% Nitrogen-15 Nuclear Spin Polarization

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Catalytic Transfer of Magnetism Using a Neutral Iridium Phenoxide Complex

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Hyperpolarization of amino acid derivatives in water for biological applications

S. Gloeggler et al.

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NMR Hyperpolarization Techniques for Biomedicine

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Effective PHIP Labeling of Bioactive Peptides Boosts the Intensity of the NMR Signal

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Review Chemistry, Multidisciplinary

Chemistry and biochemistry of 13C hyperpolarized magnetic resonance using dynamic nuclear polarization

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LIGHT-SABRE enables efficient in-magnet catalytic hyperpolarization

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Irreversible Catalyst Activation Enables Hyperpolarization and Water Solubility for NMR Signal Amplification by Reversible Exchange

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Tweezers for Parahydrogen: A Metal-Free Probe of Nonequilibrium Nuclear Spin States of H2 Molecules

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Hydrogen Activation by an Aromatic Triphosphabenzene

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Toward Nanomolar Detection by NMR Through SABRE Hyperpolarization

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The Feasibility of Formation and Kinetics of NMR Signal Amplification by Reversible Exchange (SABRE) at High Magnetic Field (9.4 T)

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Hyperpolarisation through reversible interactions with parahydrogen

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CATALYSIS SCIENCE & TECHNOLOGY (2014)

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PHIP-label: parahydrogen-induced polarization in propargylglycine-containing synthetic oligopeptides

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Ligand effects of NHC-iridium catalysts for signal amplification by reversible exchange (SABRE)

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CHEMICAL COMMUNICATIONS (2013)

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Level Anti-Crossings are a Key Factor for Understanding para-Hydrogen-Induced Hyperpolarization in SABRE Experiments

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Optimization of SABRE for polarization of the tuberculosis drugs pyrazinamide and isoniazid

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Application of Parahydrogen Induced Polarization Techniques in NMR Spectroscopy and Imaging

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A pulsed injection parahydrogen generator and techniques for quantifying enrichment

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Similarity of SABRE field dependence in chemically different substrates

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Parahydrogen-Induced Polarization with a Rh-Based Monodentate Ligand in Water

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Zero-Field NMR Enhanced by Parahydrogen in Reversible Exchange

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Utilization of SABRE-Derived Hyperpolarization To Detect Low-Concentration Analytes via 1D and 2D NMR Methods

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Parahydrogen-Induced Polarization in Heterogeneous Hydrogenations over Silica-Immobilized Rh Complexes

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Iridium N-Heterocyclic Carbene Complexes as Efficient Catalysts for Magnetization Transfer from para-Hydrogen

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Para-hydrogen induced polarization of amino acids, peptides and deuterium-hydrogen gas

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Detecting treatment response in a model of human breast adenocarcinoma using hyperpolarised [1-13C]pyruvate and [1,4-13C2]fumarate

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An NMR study of cobalt-catalyzed hydroformylation using para-hydrogen induced polarisation

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Para-Hydrogen Induced Polarization without Incorporation of Para-Hydrogen into the Analyte

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A theoretical basis for spontaneous polarization transfer in non-hydrogenative parahydrogen-induced polarization

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Spontaneous Transfer of Parahydrogen Derived Spin Order to Pyridine at Low Magnetic Field

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Electronic and Steric Parameters of 76 N-Heterocyclic Carbenes in Ni(CO)3(NHC)

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Production of hyperpolarized [1,4-13C2]malate from [1,4-13C2]fumarate is a marker of cell necrosis and treatment response in tumors

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Reversible Interactions with para-Hydrogen Enhance NMR Sensitivity by Polarization Transfer

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Review Chemistry, Inorganic & Nuclear

Parahydrogen-based NMR methods as a mechanistic probe in inorganic chemistry

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Palladium catalysed alkyne hydrogenation and oligomerisation: a parahydrogen based NMR investigation

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Determination of N-heterocyclic carbene (NHC) steric and electronic parameters using the [(NHC)Ir(CO)2Cl] system

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Detection of picomole amounts of biological substrates by para-hydrogen-enhanced NMR methods in conjunction with a suitable receptor complex

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para-hydrogen-induced polarization in heterogeneous hydrogenation reactions

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Towards hyperpolarized 13C-succinate imaging of brain cancer

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Rhodium(I) hydrogenation in water:: Kinetic studies and the detection of an intermediate using 13C{1H} PHIPNMR spectroscopy

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A model iridium hydroformylation system with the large bite angle ligand xantphos: Reactivity with parahydrogen and implications for hydroformylation catalysis

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Para-hydrogen enrichment and hyperpolarization

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Transfer of parahydrogen-induced hyperpolarization to 19F

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Detection of intermediates in cobalt-catalyzed hydroformylation using para-hydrogen-induced polarization

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Transfer of para-hydrogen spin order into polarization by diabatic field cycling

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Theoretical study of the semihydrogenation of alkynes catalyzed by Pd(0) complexes: Is a zwitterionic pathway possible?

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Hyperpolarization transfer from parahydrogen to deuterium via carbon-13

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The study of inorganic systems by NMR spectroscopy in conjunction with parahydrogen-induced polarisation

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One-hydrogen polarization in hydroformylation promoted by platinum-tin and iridium carbonyl complexes: A new type of parahydrogen-induced effect

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Heterolytic activation of hydrogen as a trigger for iridium complex promoted activation of carbon-fluorine bonds

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13C PHIP NMR spectra and polarization transfer during the homogeneous hydrogenation of alkynes with parahydrogen

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In situ H-1-PHIP-NMR studies of the stereoselective hydrogenation of alkynes to (E)-alkenes catalyzed by a homogeneous [Cp*Ru](+) catalyst

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Mechanism of asymmetric hydrogenation catalyzed by a rhodium complex of (S,S)-1,2-bis(tert-butylmethylphosphino)ethane.: Dihydride mechanism of asymmetric hydrogenation

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Kinetic studies as a tool for the elucidation of the mechanisms of metal complex-catalyzed homogeneous hydrogenation reactions

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