Efficient Light-Harvesting Antenna with a Multi-Porphyrin Cascade

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• 作者：Atsuhiro Uetomo ; Masatoshi Kozaki ; Shuichi Suzuki ; Ken-ichi Yamanaka ; Osamu Ito ; Keiji Okada
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：August 31, 2011
• 年：2011
• 卷：133
• 期：34
• 页码：13276-13279
• 全文大小：810K
• 年卷期：v.133,no.34(August 31, 2011)
• ISSN：1520-5126

文摘

A light-harvesting antenna 1 comprising three varieties of porphyrins, each having a different number of ethynyl groups at its meso positions, was designed and synthesized. Antenna 1 exhibits intense absorption throughout the visible region up to 700 nm. Steady-state and time-resolved fluorescence studies showed that singlet-excited-state energy transfer occurs from the peripheral porphyrins to the central porphyrin with >90% efficiency and rate constants on the order of 10¹⁰ s^鈥?.