PHOTOCATALYSIS OF PERFLUORINATED OLIGO(P-PHENYLENE)S

被引:27
作者
MARUO, K [1 ]
WADA, Y [1 ]
YANGIDA, S [1 ]
机构
[1] OSAKA UNIV, FAC ENGN, SUITA, OSAKA 565, JAPAN
关键词
D O I
10.1246/bcsj.65.3439
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Perfluorination of oligo(p-phenylene)s (OPP-n), biphenyl(OPP-2) to p-quaterphenyl (OPP-4), induces various changes in the spectral and physical characteristics of OPP-n; a hypsochromic shift of their absorption spectra, a decrease in their fluorescence quantum yields, an increase in their fluorescence lifetimes, and a positive shift of their oxidation potentials. The resulting perfluorinated oligo(p-phenylene)s (F-OPP-n, n=3 and 4) shows photocatalytic activities for the photoreduction of water and for the photooxidation of benzene to phenol. Irradiation of an aqueous methanol solution of F-OPP-3 with triethylamine as an electron donor, and noble metal colloid as an electron mediator at lambda>290 nm, leads to H-2 evolution, although photodefluorination through F-OPP-3-. inevitably occurs to an appreciable extent. A similar irradiation of an aqueous acetonitrile solution with O2 and benzene induces the oxidation of benzene and water, yielding almost equal quantities of phenol and H2O2 without any accompanying degradation of F-OPP-3.
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页码:3439 / 3449
页数:11
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