An artificial photosynthesis porphyrin tetrad molecule for photoelectric conversion

• Published in: Solar energy materials and solar cells Vol. 38; no. 1; pp. 139 - 155
• Main Authors: Cao, Yi, Zhang, Bao Wen, Qian, Wen Yuan, Wang, Xiang Dong, Bai, Jian Wei, Xiao, Xu Rui, Jia, Jian Guang, Xu, Jin Wei
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 1995; Elsevier
• Subjects: Biological and medical sciences; Cell structures and functions; Chloroplast, photosynthetic membrane and photosynthesis; Fundamental and applied biological sciences. Psychology; Molecular and cellular biology; Spectrometry; Photoinduction; Porphyrin; Charge separation; Diad; Electron transfer; Triad; Chemical synthesis; Tetrad
• ISSN: 0927-0248; 1879-3398
• DOI: 10.1016/0927-0248(94)00244-4

A new artificial photosynthesis porphyrin tetrad compound of porphyrin-terephthahc acid ester-viologen-carbarzole (1) was synthesized and compared with two triad compounds (2a, 2b) and two diad compounds (3a, 3b) for photoelectric conversion. The absorption and fluorescence spectra in solution and in binary solvent were investigated; especially, the effects of aggregation on the photophysical properties were studied. A mechanism including photoinduced electron transfer and multistep charge separation for tetrad compound was suggested. By using the LB technique, the synthetic molecular devices were prepared with molecules 1, 2a, 2b, 3a, 3b and the model compound of porphyrin (4b), respectively. With only one monolayer of tetrad LB film on the surface of SnO2 conductive glass, rather high photodriven voltage and current were obtained.