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Photoactive metal carbonyl complexes bearing N-heterocyclic carbene ligands: synthesis, characterization, and viability as photoredox catalysts
Citation
Tang, M and Cameron, L and Poland, EM and Yu, LJ and Moggach, SA and Fuller, RO and Huang, H and Sun, J and Thickett, SC and Massi, M and Coote, ML and Ho, CC and Bissember, AC, Photoactive metal carbonyl complexes bearing N-heterocyclic carbene ligands: synthesis, characterization, and viability as photoredox catalysts, Inorganic Chemistry, 61, (4) pp. 1888-1898. ISSN 0020-1669 (2022) [Refereed Article]
Copyright Statement
© 2022 American Chemical Society
DOI: doi:10.1021/acs.inorgchem.1c02964
Abstract
This report details the synthesis and characterization of a small family of previously unreported, structurally related chromium, molybdenum, tungsten, manganese, and iron complexes bearing N-heterocyclic carbene and carbonyl supporting ligands. These complexes have the general form [ML(CO)3X] or [ML(CO)3], where X = CO or Br and L = 1-phenyl-3-(2-pyridyl)imidazolin-2-ylidene. Where possible, the solid-state, spectroscopic, electrochemical, and photophysical properties of these molecules were studied using a combination of experiment and theory. Photophysical studies reveal that decarbonylation occurs when these complexes are exposed to ultraviolet light, with the CO ligand being replaced with a labile acetonitrile solvent molecule. To obtain insights into the potential utility, scope, and applications of these complexes in visible-light-mediated photoredox catalysis, their capacity to facilitate a range of photoinduced reactions via the reductive or oxidative functionalization of organic molecules was investigated. These chromium, molybdenum, and manganese catalysts efficiently facilitated atom-transfer radical addition processes. In light of their photolability, these types of catalysts may potentially allow for the development of photoinduced reactions involving less conventional inner-sphere electron-transfer pathways.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | N-heterocyclic carbenes, transition metals, photoredox catalysis |
| Research Division: | Chemical Sciences |
| Research Group: | Inorganic chemistry |
| Research Field: | Organometallic chemistry |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the chemical sciences |
| UTAS Author: | Tang, M (Miss Meiqiong Tang) |
| UTAS Author: | Poland, EM (Mrs Eve Poland) |
| UTAS Author: | Fuller, RO (Dr Rebecca Fuller) |
| UTAS Author: | Thickett, SC (Dr Stuart Thickett) |
| UTAS Author: | Ho, CC (Dr Curtis Ho) |
| UTAS Author: | Bissember, AC (Associate Professor Alex Bissember) |
| ID Code: | 148650 |
| Year Published: | 2022 |
| Funding Support: | Australian Research Council (DP210100025) |
| Deposited By: | Chemistry |
| Deposited On: | 2022-02-01 |
| Last Modified: | 2022-04-07 |
| Downloads: | 0 |
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