Meso-5,10,15,20-四(对羟基苯基)金属卟啉对纳米TiO_2多孔膜电极的敏化研究

以吡咯和对羟基苯甲醛为原料,丙酸为溶剂采用Adler法合成了Meso-5,10,15,20-四(对羟基苯基)卟啉[H_2THPP],并以其及醋酸金属盐为原料,采用固液相结合的方法合成了Meso-5,10,15,20-四(对羟基苯基)金属卟啉[MTHPP),M=Cu,Co]。研究了H_2THPP及M(THPP)[M=Cu,Co]对纳米TiO_2多孔膜电极的敏化性质,用红外光谱和紫外可见光谱对其主要基团及敏化电极进行了表征和测试。结果发现:H_2THPP和M(THPP)[M=Cu,Co]与TiO_2间都存在微弱的相互作用。MTHPP的敏化性质与中心金属离子密切相关,敏化效果的顺序为:CuTHPPH_2THPPCoTHPP。

PHOTOSENSITIZATION OF NANOPOROUS TiO2 ELECTRODES WITH MESO-5, 10, 15, 20-TETRAKIS (4-HYDROXYLPHENYL) METALLOPORPHYRINS

The title porphyrin of meso-5, 10, 15, 20-tetrakis (4-hydroxylphenyl) porphyrin (H2 THPP) was synthesized by Adler method starting from pyrrole and p-hydroxylbenzaldehyde with propionic acid as a single solvent. The solid and liquid combined syntheses of copper (Ⅱ) and cobalt (Ⅱ) of meso-5, 10, 15, 20-tetrakis (4-hydroxylphenyl) metalloporphyrins [M(THPP), M = Cu, Co]were carried out using the title porphyrin and metal acetate as starting materials.Their photosensitivities were studied by sensitizing nanoporous TiO2 film electrodes. The H2 THPP, M(THPP) [M =Cu, Co]and their sensitized TiO2 electrodes were characterized by IR and UV-Vis. The results showed that there was a weak interaction between TiO2 and H2 THPP, and MTHPP. And the photosensitivities of metalloporphyrins depended on center metal to some extent. The photosensitization followed the order of CuTHPP > H2 THPP > CoTHPP.