四苯基卟啉及其衍生物的表面光伏性质研究

A STUDY ON THE SURFACE PHOTOVOLTAIC PROPERTIES OF TPP AND ITS DERIVATIVES

利用表面光电压谱(SPS)研究了四苯基卟啉及其衍生物的表面光伏性质。苯基的对位取代基[-NH_2、-N(CH_3)_2、-N^+(CH_3)_3I^-]影响卟啉的光伏特性,-N^+(CH_3)_3I^-取代的四苯基卟啉衍生物的表面光电压谱B带劈裂成极性相反的两个峰(～400nm和460nm);不同过渡金属(FeCl^(2+)、Co^(2+)、Ni^(2+)、Cu^(2+)、Zn^(2+))配位的金属卟啉,仅CuTPP和ZnTPP具有表面光伏性质。从卟啉分子激发态的光物理性质及分子间的相互作用对以上结果进行了讨论。

The surface photovoltaic properties of TPP and its p-phenylsubstituted and metallo derivatives were studied by the surface photovoltage spectroscopy(SPS). The results show that the different properties of p-phenylsubstituted groups [-NH2, -N+ (CH3)3, -N+ (CH3)3I-] influenced the surface photovoltaic properties of porphyrins. Especially SPS of -N+(CH3)3I-substituted tetraphenylporphine derivative was very particular whose B band was splitted into two reverse symbolic peaks (-400nm, 460nm). In the study of the transition metalloporphyrins (FeCl2+, Co2+, Ni2+, Cu2+, Zn2+), we found that only CuTPP and ZnTPP possed the surface photovoltaic properties. The mechanism of surface photovoltage was discussed.