光诱导下系列钴配合物的表面电子行为对比研究

通过水热方法合成了6种Co(Ⅱ/Ⅲ)配合物Co(H2O)6·H2btec(1);{Co2(HCOO)6]·CH3OH}n(2);(Co(4,4'-bipy)2(H2O)4]·suc·4H2O}n(3);Co(NA)2(H2O)4(4);Co(mal)(4,4'-bipy)H2O]n(5);Co(HCOO)4Co(H2O)4]n(6)(H4btec=均苯四甲酸,H2suc=丁二酸,HNA=娴酸,H2mal=丙二酸,bipy=联吡啶)},测试了配合物的UV-Vis吸收光游和表面光电压光谱(SPS),并通过X-ray单晶衍射确定了配合物的结构.它们的表面光电压光谱在300～800 nm范围内均表现出正的光伏响应,并将其与UV-Vis吸收光谱进行了分析和对比,发现SPS中表面光伏响应带与UV-Vis吸收光谱的吸收峰具有良好的对应关系.通过对比6种配合物的SPS可以看出,中心金属离子的价态、配位模式及配位微环境均对SPS响应带的位置和形状有一定影响.

Comparative research on light-induced surface electron behavior of cobalt complexes

Six cobalt complexes, Co(Hz2O)6.H2btec(1); {Co2(HCOO)6].CH3OH}n(2); {Co(4,4'-bipy)2(H2O)4].suc.4H2O)}n(3); Co(NA)2(H2O)4(4); Co(mal)(4,4'-bipy)H2O]n(5) and Co(HCOO)4Co(H2O)4]n(6), were synthesized through hydrothermal method. UV-Vis absorption spectra and surface photovoltage spectra of the complexes were detected and the structures of the complexes were determined by single-crystal X-ray diffraction. There are positive responses in the range of 300-800 nm in the SPS. There are good corresponding relationships between response bands of SPS and absorption peaks of UV-Vis absorption spectra by the comparison. Comparing the SPS of six complexes, the valence, coordination mode and coordination micro-environment affect the position and the shape of the response bands.