Photocatalysis of Perfluorinated Oligo(p-Phenylene)s
Photocatalysis of Perfluorinated Oligo(p-Phenylene)s
复制标题
全氟低聚（对亚苯基）的光催化
DOI：
10.1246/bcsj.65.3439
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
S. Yanagida
中科院分区：
文献类型：
--
作者：
K. Maruo;Y. Wada;S. Yanagida
低聚（对苯）s （OPP-n）、联苯（OPP-2）到对季苯（OPP-4）的全氟化引起了对苯n的光谱和物理特性的各种变化；吸收光谱的次色移，荧光量子产率的降低，荧光寿命的增加，氧化电位的正移。得到的全氟低聚（对苯）s （F-OPP-n, n = 3和4）对水的光还原和苯的光氧化为苯酚具有光催化活性。以三乙胺为电子供体，贵金属胶体为电子介质的F-OPP-3的甲醇水溶液在λ > 290 nm处辐照，虽然F-OPP-3−•不可避免地会发生相当程度的光除氟，但会导致H2的析出。用类似的方法，用O2和苯照射乙腈水溶液，可以引起苯和水的氧化，产生几乎等量的苯酚和H2O2，而不需要任何伴生物。
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 λ > 290 nm, leads to H2 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 accompanyi...