Synthesis and photophysical properties of porphyrin-phthalocyanine heterodimer linked by piperazine  

作　　者：李希友 周庆复 田宏健 许慧君 

机构地区：[1]Institute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Chinese Journal of Chemistry》1998年第2期97-108,共12页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China;Laboratory of Excited State Processes, Changchun Institute of Physics, Chinese Academy of Sciences

摘　　要：A porphyrin-phthalocyanine heterodimer linked by piperazine has been synthesized and characterized by spectroscopic methods. UV-visible absorption spectra indicated the presence of weak intramolecular interaction between the two chromophores. Selective excitation of the porphyrin moiety leads to energy transfer process to the phthalocyanine subunit. Furthermore, on the bases of the solvent-dependent fluorescence data, a competing electron transfer reaction is shown to occur in this heterodimer. The efficiency of both photophysical processes depends strongly on solvent polarity and is related to the separation distance of the two chromophores and their relative orientation. The value of ΔG obtained using the Rehm-Weller equation clearly indicates that the heterodimer exists preferably in the “boat form” upon excitation in good agreement with the experimental results of co-occurence of energy and electron transfer process observed for the heterodimer.A porphyrin-phthalocyanine heterodimer linked by piperazine has been synthesized and characterized by spectroscopic methods. UV-visible absorption spectra indicated the presence of weak intramolecular interaction between the two chromophores. Selective excitation of the porphyrin moiety leads to energy transfer process to the phthalocyanine subunit. Furthermore, on the bases of the solvent-dependent fluorescence data, a competing electron transfer reaction is shown to occur in this heterodimer. The efficiency of both photophysical processes depends strongly on solvent polarity and is related to the separation distance of the two chromophores and their relative orientation. The value of ΔG obtained using the Rehm-Weller equation clearly indicates that the heterodimer exists preferably in the “boat form” upon excitation in good agreement with the experimental results of co-occurence of energy and electron transfer process observed for the heterodimer.

关 键 词：PORPHYRIN PHTHALOCYANINE HETERODIMER PIPERAZINE photophysical property 

分 类 号：O626[理学—有机化学]