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Photoactive Metal-to-Ligand Charge Transfer Excited States in 3d(6) Complexes with Cr(0), Mn(I), Fe(II), and Co(III)
[Image: see text] Many coordination complexes and organometallic compounds with the 4d(6) and 5d(6) valence electron configurations have outstanding photophysical and photochemical properties, which stem from metal-to-ligand charge transfer (MLCT) excited states. This substance class makes extensive...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9999427/ https://www.ncbi.nlm.nih.gov/pubmed/36808978 http://dx.doi.org/10.1021/jacs.2c13432 |
Sumario: | [Image: see text] Many coordination complexes and organometallic compounds with the 4d(6) and 5d(6) valence electron configurations have outstanding photophysical and photochemical properties, which stem from metal-to-ligand charge transfer (MLCT) excited states. This substance class makes extensive use of the most precious and least abundant metal elements, and consequently there has been a long-standing interest in first-row transition metal compounds with photoactive MLCT states. Semiprecious copper(I) with its completely filled 3d subshell is a relatively straightforward and well explored case, but in 3d(6) complexes the partially filled d-orbitals lead to energetically low-lying metal-centered (MC) states that can cause undesirably fast MLCT excited state deactivation. Herein, we discuss recent advances made with isoelectronic Cr(0), Mn(I), Fe(II), and Co(III) compounds, for which long-lived MLCT states have become accessible over the past five years. Furthermore, we discuss possible future developments in the search for new first-row transition metal complexes with partially filled 3d subshells and photoactive MLCT states for next-generation applications in photophysics and photochemistry. |
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