4.8 Article

Photoredox-active Cr(0) luminophores featuring photophysical properties competitive with Ru(II) and Os(II) complexes

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Review Chemistry, Multidisciplinary

Charge-Transfer and Spin-Flip States: Thriving as Complements

Winald R. Kitzmann et al.

Summary: Transition metal complexes with photoactive charge-transfer excited states, such as [Ru(bpy)(3)](2+) and [Cr(ddpd)(2)](3+), have been widely studied. The properties of emissive charge-transfer and spin-flip states, including their energy and lifetimes, as well as their responses to external stimuli, are discussed in this Review. The strengths and weaknesses of these states in applications like photocatalysis and circularly polarized luminescence are also identified.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023)

Article Chemistry, Multidisciplinary

Photoactive Metal-to-Ligand Charge Transfer Excited States in 3d6 Complexes with Cr0, MnI, FeII, and CoIII

Narayan Sinha et al.

Summary: Coordination complexes and organometallic compounds with the 4d(6) and 5d(6) valence electron configurations have unique photophysical and photochemical properties related to metal-to-ligand charge transfer states. Recent progress has been made in the study of Cr-0, Mn-I, Fe-II, and Co-III compounds, which exhibit long-lived MLCT states. The search for new first-row transition metal complexes with partially filled 3d subshells and photoactive MLCT states is important for future applications in photophysics and photochemistry.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2023)

Article Chemistry, Multidisciplinary

Iron Photoredox Catalysis-Past, Present, and Future

Lisa H. M. de Groot et al.

Summary: Photoredox catalysis driven by iron has gained significant attention in recent years due to its potential environmental and economic benefits. This Perspective highlights three major strategies that have been used to achieve reactivities comparable to noble metal photoredox catalysis. The strategies include replacing noble metal centers with iron, generating photoactive complexes through substrate coordination, and improving the properties of charge-transfer states through ligand design. This article provides an overview and assessment of recent developments in this rapidly growing field and discusses the future prospects of iron-based photoredox catalysis.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2023)

Article Chemistry, Multidisciplinary

A Photoreactive Iron(II) Complex Luminophore

Wolfgang Leis et al.

Summary: Controlling the order and lifetimes of electronically excited states is crucial for efficient light-to-potential energy conversion. This study presents a luminescent and photoreactive iron(II) complex, which is the first high-performance analogue of prototypical ruthenium sensitizers. The double cyclometalation of a phenylphenanthroline framework at iron(II) promotes the formation of a triplet metal-to-ligand charge transfer ((MLCT)-M-3) state as the lowest energy excited state. Near-infrared (NIR) luminescence exhibits a monoexponential decay with a lifetime of 2.4 ns in the solid state and 1 ns in the liquid phase. At 77 K, the lifetime extends to 14 ns, accompanied by a narrowing of the NIR emission band within the range of 1170-1230 nm. The Fe(II) chromophore, featuring a (MLCT)-M-3 excited-state redox potential of -2 V vs the ferrocene/ferrocenium couple, is demonstrated to be a sensitizer for light-driven synthesis through the radical cross-coupling of 4-chlorobromobenzene and benzene.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Review Chemistry, Inorganic & Nuclear

Photoactive iron complexes: more sustainable, but still a challenge

Philipp Dierks et al.

Summary: By reviewing the synthetic strategies and properties of new photoactive iron compounds, the potential and performance of iron as a more sustainable alternative to noble metals in photochemistry are explored, with a focus on the relationship between lifetime extension and sustainable substitution strategies.

INORGANIC CHEMISTRY FRONTIERS (2022)

Article Chemistry, Multidisciplinary

Chiral control of spin-crossover dynamics in Fe (II) complexes

Malte Oppermann et al.

Summary: This study demonstrates trapping of the high-spin state in iron-based spin-crossover complexes by controlling the chiral configuration. The high-spin-state decay is found to be accompanied by changes in optical activity, reflecting coupling to a symmetry-breaking torsional mode. Diastereoselective ion pairing suppresses vibrational population and increases the high-spin-state lifetime. These findings motivate the synthetic control of torsional modes in iron(II) complexes to manipulate their spin-crossover dynamics as a complementary approach.

NATURE CHEMISTRY (2022)

Article Chemistry, Multidisciplinary

Photoredox catalysis via consecutive 2LMCT- and 3MLCT-excitation of an Fe(iii/ii)-N-heterocyclic carbene complex

Aleksandra Ilic et al.

Summary: Fe-N-heterocyclic carbene (NHC) complexes have been studied for their application in visible light-mediated atom transfer radical addition. Utilizing [Fe(iii)(btz)(3)](3+) with long excited state lifetimes in both oxidation states, efficient one-electron reduction of alkyl halides was achieved under green light irradiation.

CHEMICAL SCIENCE (2022)

Review Chemistry, Physical

Strategies for accessing photosensitizers with extreme redox potentials

Dooyoung Kim et al.

Summary: Photoredox catalysis is crucial in many applications, with its activity depending on the photophysical and electrochemical properties of photocatalysts, especially in challenging organic synthesis reactions.

CHEMICAL PHYSICS REVIEWS (2022)

Article Chemistry, Multidisciplinary

A Photorobust Mo(0) Complex Mimicking [Os(2,2′-bipyridine)3]2+ and Its Application in Red-to-Blue Upconversion

Jakob B. Bilger et al.

Summary: A new homoleptic Mo(0) complex with a unique diisocyanide ligand was developed, exhibiting deep red emission and high upconversion quantum yield. This complex serves as a potent irradiation source and has potential applications in red-light-driven photocatalysis and light-harvesting.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Multidisciplinary

Photoredox Catalysis Mediated by Tungsten(0) Arylisocyanides

Javier Fajardo et al.

Summary: The use of W(CNAr)(6) complexes as photoreductants enables base-promoted homolytic aromatic substitution of 1-(2-iodobenzyl)-pyrrole. High efficiency is achieved with the most powerful photoreductant W(CNDipp)(6), which can be regenerated by chemical reduction.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Multidisciplinary

Pyrene-Decoration of a Chromium(0) Tris(diisocyanide) Enhances Excited State Delocalization: A Strategy to Improve the Photoluminescence of 3d6 Metal Complexes

Christina Wegeberg et al.

Summary: Introducing pyrene units into the diisocyanide ligand backbone significantly enhances the luminescence quantum yield and MLCT lifetime of a chromium(0) isocyanide complex by nearly two orders of magnitude. The enlarged pi-conjugation system in the ligand leads to a strongly delocalized MLCT state, reducing nonradiative relaxation despite a redshift of the emission wavelength. Luminescence properties of the complex exhibit a unique solvent polarity-dependent behavior, indicating two competing mechanisms for MLCT deactivation.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Multidisciplinary

Strongly Red-Emissive Molecular Ruby [Cr(bpmp)2]3+ Surpasses [Ru(bpy)3]2+

Florian Reichenauer et al.

Summary: This study unveils a novel highly luminescent spin-flip emitter with a quantum chemically predicted blue-shifted luminescence, featuring high excited state energy and quantum yield. It shows potential applications in technologies such as photophysics and photochemistry, surpassing classical precious metal charge transfer complexes in optical sensing and photo(redox) catalysis.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Multidisciplinary

Manganese(i) complexes with metal-to-ligand charge transfer luminescence and photoreactivity

Patrick Herr et al.

Summary: Metal complexes with d(6) valence electron configuration often exhibit luminescent metal-to-ligand charge transfer (MLCT) excited states, useful for various applications. Iron(ii) has been suggested as an Earth-abundant alternative, but no iron(ii) complex has been reported to show MLCT emission. In this study, manganese(I) complexes with isocyanide chelate ligands were found to exhibit MLCT luminescence in solution at room temperature, showing promising applications in energy and electron transfer reactions.

NATURE CHEMISTRY (2021)

Article Chemistry, Multidisciplinary

Luminescent First-Row Transition Metal Complexes

Christina Wegeberg et al.

Summary: Recent developments in the field of inorganic photophysics and photochemistry indicate a shift towards cheaper and more abundant metals, away from traditional precious and rare elements. Conceptual breakthroughs have expanded the range of elements, particularly those in different oxidation states, that can be used for emissive complexes. New design strategies have led to the discovery of fundamentally new types of 3d-metal-based luminophores and photosensitizers operating in solution at room temperature.

JACS AU (2021)

Article Chemistry, Multidisciplinary

Photoredox catalysis on unactivated substrates with strongly reducing iridium photosensitizers

Jong-Hwa Shon et al.

Summary: This study demonstrates that strong bis-cyclometalated iridium photoreductants with specific ligands can achieve high-yielding photoredox transformations of challenging substrates with very simple reaction conditions requiring only a single sacrificial reagent.

CHEMICAL SCIENCE (2021)

Article Multidisciplinary Sciences

Discovery and characterization of an acridine radical photoreductant

Ian A. MacKenzie et al.

NATURE (2020)

Review Chemistry, Multidisciplinary

Triplet Energy Transfer Photocatalysis: Unlocking the Next Level

Felix Strieth-Kalthoff et al.

Article Chemistry, Multidisciplinary

Mechanistic Origin of Photoredox Catalysis Involving Iron(II) Polypyridyl Chromophores

Matthew D. Woodhouse et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

Review Chemistry, Multidisciplinary

Photophysics and photochemistry with Earth-abundant metals - fundamentals and concepts

Christoph Foerster et al.

CHEMICAL SOCIETY REVIEWS (2020)

Article Multidisciplinary Sciences

Terminal coordination of diatomic boron monofluoride to iron

Myles J. Drance et al.

SCIENCE (2019)

Review Multidisciplinary Sciences

ORGANIC CHEMISTRY Copper's rapid ascent in visible-light photoredox catalysis

Asik Hossain et al.

SCIENCE (2019)

Article Chemistry, Multidisciplinary

Long-Lived, Strongly Emissive, and Highly Reducing Excited States in Mo(0) Complexes with Chelating Isocyanides

Patrick Herr et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Multidisciplinary Sciences

Photoredox catalysis using infrared light via triplet fusion upconversion

Benjamin D. Ravetz et al.

NATURE (2019)

Article Multidisciplinary Sciences

Luminescence and reactivity of a charge-transfer excited iron complex with nanosecond lifetime

Kasper Skov Kjmer et al.

SCIENCE (2019)

Review Chemistry, Multidisciplinary

Judicious Design of Cationic, Cyclometalated Ir(III) Complexes for Photochemical Energy Conversion and Optoelectronics

Isaac N. Mills et al.

ACCOUNTS OF CHEMICAL RESEARCH (2018)

Article Chemistry, Physical

Fe-II Hexa N-Heterocyclic Carbene Complex with a 528 ps Metal-to-Ligand Charge-Transfer Excited-State Lifetime

Pavel Chabera et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2018)

Article Chemistry, Multidisciplinary

A Tris(diisocyanide)chromium(0) Complex Is a Luminescent Analog of Fe(2,2′-Bipyridine)32+

Laura A. Buldt et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2017)

Review Chemistry, Multidisciplinary

Fe N-Heterocyclic Carbene Complexes as Promising Photosensitizers

Yizhu Liu et al.

ACCOUNTS OF CHEMICAL RESEARCH (2016)

Review Chemistry, Multidisciplinary

The photophysics of photoredox catalysis: a roadmap for catalyst design

Daniela M. Arias-Rotondo et al.

CHEMICAL SOCIETY REVIEWS (2016)

Article Chemistry, Physical

A comprehensive comparison of dye-sensitized NiO photocathodes for solar energy conversion

Christopher J. Wood et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2016)

Review Chemistry, Multidisciplinary

Light-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal Complexes

Vivian Wing-Wah Yam et al.

CHEMICAL REVIEWS (2015)

Article Chemistry, Multidisciplinary

Bespoke Photoreductants: Tungsten Arylisocyanides

Wesley Sattler et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2015)

Article Chemistry, Multidisciplinary

Sub-50-fs photoinduced spin crossover in [Fe(bpy)3]2+

Gerald Auboeck et al.

NATURE CHEMISTRY (2015)

Article Multidisciplinary Sciences

Tracking excited-state charge and spin dynamics in iron coordination complexes

Wenkai Zhang et al.

NATURE (2014)

Review Chemistry, Multidisciplinary

Visible Light Photoredox Catalysis with Transition Metal Complexes: Applications in Organic Synthesis

Christopher K. Prier et al.

CHEMICAL REVIEWS (2013)

Article Chemistry, Inorganic & Nuclear

Photon upconversion based on sensitized triplet-triplet annihilation

Tanya N. Singh-Rachford et al.

COORDINATION CHEMISTRY REVIEWS (2010)

Review Chemistry, Multidisciplinary

Biomimetic and Microbial Approaches to Solar Fuel Generation

Ann Magnuson et al.

ACCOUNTS OF CHEMICAL RESEARCH (2009)

Review Chemistry, Multidisciplinary

Photochemical conversion of solar energy

Vincenzo Balzani et al.

CHEMSUSCHEM (2008)