期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 119, 期 9, 页码 4742-4751出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b00866
关键词
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资金
- German Science Foundation [DI 1517/3-1, SCHU 1229/16-1]
- Carl-Zeiss-Foundation
- Friedrich Schiller University Jena (Nachwuchsforderung)
A photosensitizer-multielectron-acceptor dyad (P-An) was synthesized via controlled nitroxide-mediated polymerization of styrenic naphthalene diimide (NDI) and subsequent functionalization with a [Ru(dqp)(2)](2+) photosensitizer (dqp is 2,6-di(quinolin-8-yl)pyridine) at the chain terminus. The optical and electrochemical analysis showed the preserved properties of the individual subunits, corroborated by the analysis of the related multielectron donor assembly (D-n-P) based on triarylamine (TARA). A detailed photophysical study of both dyads is presented to elucidate the primary light-induced energy- and electron-transfer events. While the D-n-P dyad displays the unchanged 3MLCT-based (MLCT is metal-to-ligand charge transfer) emission of the pristine photosensitizer, the P-An system revealed efficient emission quenching and the occurrence of the NDI radical anion signature. The time-resolved emission data revealed a nonmonoexponential decay attributed to the conformational freedom by the flexible linkage, while the transient absorption data confirmed the rapid formation of the reduced acceptor.
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