4.7 Article

The overlooked NIR luminescence of Cr(ppy)3

Related references

Note: Only part of the references are listed.
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)

Article Chemistry, Physical

Unraveling exciton processes in Ir(ppy)3:CBP OLED films upon photoexcitation

Stephen Sanderson et al.

Summary: This study used kinetic Monte Carlo simulations to investigate exciton diffusion in Ir(ppy)(3):CBP blend films, revealing the effects of guest concentration and exciton density on system properties. The simulations suggest that triplet diffusion mainly occurs through guest-guest Dexter transfer and that concentration quenching of triplets has a negligible effect at high exciton densities due to triplet-triplet annihilation.

JOURNAL OF CHEMICAL PHYSICS (2021)

Article Chemistry, Multidisciplinary

A Near-Infrared-II Emissive Chromium(III) Complex

Narayan Sinha et al.

Summary: By combining pi-donating amido with pi-accepting pyridine coordination units in a tridentate chelate ligand, a strong nephelauxetic effect was achieved in a homoleptic Cr-III complex, shifting its luminescence to the NIR-II spectral range. This study focuses on increasing metal-ligand bond covalence to shift the ruby-like E-2 emission of Cr-III to 1067 nm at 77 K, taking a fundamentally different approach from previous ligand design strategies.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Adenine Radical Cation Formation by a Ligand-Centered Excited State of an Intercalated Chromium Polypyridyl Complex Leads to Enhanced DNA Photo-oxidation

Frederico A. Baptista et al.

Summary: The excited states of [Cr(TMP)(2)dppz](3+) participate in DNA photoreactions, with the emission of 1 being quenched when interacting with natural DNA or oligodeoxynucleotides. The presence of dppz-centered states and sensitized formation of the adenine radical cation species in DNA photo-oxidation have implications for future phototherapeutics and photocatalysis.

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

Spin Crossover and Long-Lived Excited States in a Reduced Molecular Ruby

Patrick M. Becker et al.

CHEMISTRY-A EUROPEAN JOURNAL (2020)

Article Chemistry, Multidisciplinary

A Vanadium(III) Complex with Blue and NIR-II Spin-Flip Luminescence in Solution

Matthias Dorn et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

Article Chemistry, Multidisciplinary

Cyclic (Amino)(aryl)carbenes Enter the Field of Chromophore Ligands: Expanded π System Leads to Unusually Deep Red Emitting CuI Compounds

Markus Gernert 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 Chemistry, Multidisciplinary

Excited-State Kinetics of an Air-Stable Cyclometalated Iron(II) Complex

Jakob Steube et al.

CHEMISTRY-A EUROPEAN JOURNAL (2019)

Article Chemistry, Multidisciplinary

Chiral Molecular Ruby [Cr(dqp)2]3+ with Long-Lived Circularly Polarized Luminescence

Juan-Ramon Jimenez et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Chemistry, Multidisciplinary

Is Iron the New Ruthenium?

Oliver S. Wenger

CHEMISTRY-A EUROPEAN JOURNAL (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, Physical

Photoredox catalysts based on earth-abundant metal complexes

Bryony M. Hockin et al.

CATALYSIS SCIENCE & TECHNOLOGY (2019)

Article Chemistry, Multidisciplinary

Blue-Emissive Cobalt(III) Complexes and Their Use in the Photocatalytic Trifluoromethylation of Polycyclic Aromatic Hydrocarbons

Amlan K. Pal et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2018)

Article Chemistry, Multidisciplinary

Deuterated Molecular Ruby with Record Luminescence Quantum Yield

Cui Wang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2018)

Article Chemistry, Multidisciplinary

A Strongly Luminescent Chromium(III) Complex Acid

Sven Otto et al.

CHEMISTRY-A EUROPEAN JOURNAL (2018)

Review Chemistry, Inorganic & Nuclear

Quantitative wave function analysis for excited states of transition metal complexes

Sebastian Mai et al.

COORDINATION CHEMISTRY REVIEWS (2018)

Article Chemistry, Inorganic & Nuclear

Photolytic Reactivity of Organonnetallic Chromium Bipyridine Complexes

Benjamin E. Olafsen et al.

INORGANIC CHEMISTRY (2018)

Review Chemistry, Inorganic & Nuclear

Sustainable metal complexes for organic light-emitting diodes (OLEDs)

Claudia Bizzarri et al.

COORDINATION CHEMISTRY REVIEWS (2018)

Review Chemistry, Multidisciplinary

Photoactive Complexes with Earth-Abundant Metals

Oliver S. Wenger

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2018)

Article Chemistry, Inorganic & Nuclear

Synthesis, Structures, and Photophysical Properties of a Series of Rare Near-IR Emitting Copper(I) Complexes

Benjamin Hupp et al.

INORGANIC CHEMISTRY (2017)

Article Chemistry, Inorganic & Nuclear

Excited-State Decay Pathways of Tris(bidentate) Cyclometalated Ruthenium(II) Compounds

Tyler C. Motley et al.

INORGANIC CHEMISTRY (2017)

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

Phosphorescent Neutral Iridium (III) Complexes for Organic Light-Emitting Diodes

Abd. Rashid Bin Mohd Yusoff et al.

TOPICS IN CURRENT CHEMISTRY (2017)

Review Chemistry, Inorganic & Nuclear

Over the LEC rainbow: Colour and stability tuning of cyclometallated iridium(III) complexes in light-emitting electrochemical cells

Catherine E. Housecroft et al.

COORDINATION CHEMISTRY REVIEWS (2017)

Article Chemistry, Multidisciplinary

Elucidating the Spatial Arrangement of Emitter Molecules in Organic Light-Emitting Diode Films

Claire Tonnele et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2017)

Article Chemistry, Inorganic & Nuclear

Excited state decay of cyclometalated polypyridine ruthenium complexes: insight from theory and experiment

Christoph Kreitner et al.

DALTON TRANSACTIONS (2016)

Article Chemistry, Multidisciplinary

[Cr(ddpd)2]3+: A Molecular, Water-Soluble, Highly NIR-Emissive Ruby Analogue

Sven Otto et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2015)

Article Chemistry, Inorganic & Nuclear

fac-Ir(ppy)3: Structures in the Gas-Phase and of a New Solid Modification

Raphael J. F. Berger et al.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (2010)

Article Chemistry, Inorganic & Nuclear

The Triplet State of fac-Ir(ppy)3

Thomas Hofbeck et al.

INORGANIC CHEMISTRY (2010)

Article Chemistry, Inorganic & Nuclear

Synthesis and Solution Phase Characterization of Strongly Photooxidizing Heteroleptic Cr(III) Tris-Dipyridyl Complexes

Ashley M. McDaniel et al.

INORGANIC CHEMISTRY (2010)

Article Chemistry, Inorganic & Nuclear

Emissive Chromium(III) Complexes with Substituted Arylethynyl Ligands

David L. Grisenti et al.

INORGANIC CHEMISTRY (2008)

Article Chemistry, Multidisciplinary

Ultrafast dynamics of 2E state formation in Cr(acac)3

EA Juban et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2005)

Article Chemistry, Multidisciplinary

Synthesis and characterization of facial and meridional tris-cyclometalated iridium(III) complexes

AB Tamayo et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2003)