Photochemistry of charge-transfer complexes in a viologen periodic mesoporous organosilica:: Time evolution from femtoseconds to minutes

被引：9

作者：

Alvaro, M

Ferrer, B

García, H

Hashimoto, S

Hiratsuka, M

Asahi, T

Masuhara, H

机构：

[1] Univ Politecn Valencia, Inst Tecnol Quim, CSIC, Valencia 46022, Spain

[2] Univ Politecn Valencia, Dept Quim, Valencia 46022, Spain

[3] Gunma Coll Technol, Dept Chem, Maebashi, Gumma 3718530, Japan

[4] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan

来源：

CHEMPHYSCHEM | 2004年 / 5卷 / 07期

关键词：

charge transfer; mesoporous materials; photochemistry; radical ions; viologens;

D O I：

10.1002/cphc.200301038

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Persistent radical cations can be generated in V ∝ PMO, a periodic mesoporous organosilica incorporating a viologen in its silicate framework. Photoexcitation of V ∝ PMO forms a geminate viologen-halide ion pair that can undergo rapid charge recombination or electron hopping to form the nongeminate ion pair, which persists for minutes (see picture). In contrast, viologen-halide CT complexes in solution undergo complete charge recombination on the sub-nanosecond timescale.

引用

页码：1058 / 1062

页数：5

共 33 条

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