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- W4288036710 abstract "Rigid, conjugated alkyne bridges serve as important components in various transition-metal complexes used for energy conversion, charge separation, sensing, and molecular electronics. Alkyne stretching modes have potential for modulating charge separation in donor–bridge–acceptor compounds. Understanding the rules of energy relaxation and energy transfer across the metal center in such compounds can help optimize their electron transfer switching properties. We used relaxation-assisted two-dimensional infrared spectroscopy to track energy transfer across metal centers in platinum complexes featuring a triazole-terminated alkyne ligand of two or six carbons, a perfluorophenyl ligand, and two tri(p-tolyl)phosphine ligands. Comprehensive analyses of waiting-time dynamics for numerous cross and diagonal peaks were performed, focusing on coherent oscillation, energy transfer, and cooling parameters. These observables augmented with density functional theory computations of vibrational frequencies and anharmonic force constants enabled identification of different functional groups of the compounds. Computations of vibrational relaxation pathways and mode couplings were performed, and two regimes of intramolecular energy redistribution are described. One involves energy transfer between ligands via high-frequency modes; the transfer is efficient only if the modes involved are delocalized over both ligands. The energy transport pathways between the ligands are identified. Another regime involves redistribution via low-frequency delocalized modes, which does not lead to interligand energy transport." @default.
- W4288036710 created "2022-07-27" @default.
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- W4288036710 date "2022-07-26" @default.
- W4288036710 modified "2023-10-16" @default.
- W4288036710 title "Tracking Energy Transfer across a Platinum Center" @default.
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- W4288036710 doi "https://doi.org/10.1021/acs.jpca.2c02017" @default.
- W4288036710 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35881911" @default.
- W4288036710 hasPublicationYear "2022" @default.
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