期刊
COORDINATION CHEMISTRY REVIEWS
卷 304, 期 -, 页码 109-116出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ccr.2014.09.019
关键词
Photoinduced electron transfer; Molecular dyads; Os(II) polypyridine complexes; Equilibrated states; Charge separation; Charge recombination
资金
- MIUR (FIRB Project Nanosolar) [RBAP11C58Y]
- MIUR (PRIN Project Hi-Phuture) [2010N3T9M41202PERSPECT H2O]
Photoinduced electron transfer continues to be a key process for the design of artificial systems capable to perform an efficient solar energy conversion. In particular, linearly-arranged donor bridge acceptor dyads have greatly contributed to shine light on the various factors that must be taken into account when designing systems for obtaining long-lived charge separation, a useful property on the route to artificial photosynthesis. Here we summarized the results we recently obtained on the photoinduced electron transfer processes occurring in Os(II)-bis(terpyridine)-(bi)pyridinium dyads. In particular, we will focus on the role of the bridge in forward and backward electron transfer processes, and on the possibility of obtaining efficient photoinduced charge separation even when the driving force for the electron transfer process approaches zero. This latter point can be of considerable interest when several electron transfer steps are considered to ultimately yield long-range charge-separated state, with minimal energy losses from the initial, light-prepared localized excited state. (C) 2014 Elsevier B.V. All rights reserved.
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