NIR‐Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature

The development of NIR emitters based on earth‐abundant elements is an important goal in contemporary science. We present here Cr(0), Mo(0), and W(0) carbonyl complexes with a pyridyl‐mesoionic carbene (MIC) based ligand. A detailed photophysical investigation shows that all the complexes exhibit du...

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Autores principales: Boden, Pit, Di Martino‐Fumo, Patrick, Bens, Tobias, Steiger, Sophie, Albold, Uta, Niedner‐Schatteburg, Gereon, Gerhards, Markus, Sarkar, Biprajit
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8519045/
https://www.ncbi.nlm.nih.gov/pubmed/34237175
http://dx.doi.org/10.1002/chem.202102208
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author Boden, Pit
Di Martino‐Fumo, Patrick
Bens, Tobias
Steiger, Sophie
Albold, Uta
Niedner‐Schatteburg, Gereon
Gerhards, Markus
Sarkar, Biprajit
author_facet Boden, Pit
Di Martino‐Fumo, Patrick
Bens, Tobias
Steiger, Sophie
Albold, Uta
Niedner‐Schatteburg, Gereon
Gerhards, Markus
Sarkar, Biprajit
author_sort Boden, Pit
collection PubMed
description The development of NIR emitters based on earth‐abundant elements is an important goal in contemporary science. We present here Cr(0), Mo(0), and W(0) carbonyl complexes with a pyridyl‐mesoionic carbene (MIC) based ligand. A detailed photophysical investigation shows that all the complexes exhibit dual emissions in the VIS and in the NIR region. The emissive excited states are assigned to two distinct triplet states by time‐resolved emission and step‐scan FTIR spectroscopy at variable temperature, supported by density functional theory. In particular, the NIR emissive triplet state exhibits unprecedented lifetimes of up to 600±10 ns and quantum yields reaching 1.7 ⋅ 10(−4) at room temperature. These are the first examples of Cr(0), Mo(0) and W(0) complexes that emit in the NIR II region.
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spelling pubmed-85190452021-10-21 NIR‐Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature Boden, Pit Di Martino‐Fumo, Patrick Bens, Tobias Steiger, Sophie Albold, Uta Niedner‐Schatteburg, Gereon Gerhards, Markus Sarkar, Biprajit Chemistry Communications The development of NIR emitters based on earth‐abundant elements is an important goal in contemporary science. We present here Cr(0), Mo(0), and W(0) carbonyl complexes with a pyridyl‐mesoionic carbene (MIC) based ligand. A detailed photophysical investigation shows that all the complexes exhibit dual emissions in the VIS and in the NIR region. The emissive excited states are assigned to two distinct triplet states by time‐resolved emission and step‐scan FTIR spectroscopy at variable temperature, supported by density functional theory. In particular, the NIR emissive triplet state exhibits unprecedented lifetimes of up to 600±10 ns and quantum yields reaching 1.7 ⋅ 10(−4) at room temperature. These are the first examples of Cr(0), Mo(0) and W(0) complexes that emit in the NIR II region. John Wiley and Sons Inc. 2021-08-04 2021-09-09 /pmc/articles/PMC8519045/ /pubmed/34237175 http://dx.doi.org/10.1002/chem.202102208 Text en © 2021 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Communications
Boden, Pit
Di Martino‐Fumo, Patrick
Bens, Tobias
Steiger, Sophie
Albold, Uta
Niedner‐Schatteburg, Gereon
Gerhards, Markus
Sarkar, Biprajit
NIR‐Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature
title NIR‐Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature
title_full NIR‐Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature
title_fullStr NIR‐Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature
title_full_unstemmed NIR‐Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature
title_short NIR‐Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature
title_sort nir‐emissive chromium(0), molybdenum(0), and tungsten(0) complexes in the solid state at room temperature
topic Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8519045/
https://www.ncbi.nlm.nih.gov/pubmed/34237175
http://dx.doi.org/10.1002/chem.202102208
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