Highly Efficient Photoproduction of Charge-Separated States in Donor−Acceptor-Linked Bis(acetylide) Platinum Complexes

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• 作者：Shuichi Suzuki ; Ryoji Sugimura ; Masatoshi Kozaki ; Kazutoshi Keyaki ; Koichi Nozaki ; Noriaki Ikeda ; Kimio Akiyama ; Keiji Okada
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：August 5, 2009
• 年：2009
• 卷：131
• 期：30
• 页码：10374-10375
• 全文大小：141K
• 年卷期：v.131,no.30(August 5, 2009)
• ISSN：1520-5126

文摘

We report a highly efficient charge separation system, D−Pt−A, where D (triphenylamine) and A (naphthalenediimide) are bonded to the Pt moiety through highly twisted phenylene ethynylene linkages. The quantum yields for the formation of the charge-separated state were determined to be nearly unity. The lifetimes of D⁺−Pt−A⁻ were 1 μs at room temperature and much longer at low temperature. The spin-correlated radical ion pair was directly observed by means of time-resolved EPR spectroscopy.