Photoinduced Intra-Molecular Energy Transfer of a Novel Phthalocyanine Zinc(Ⅱ) Bearing Poly (Aryl Benzyl Ether) Dendritic Substitutents with Carboxylic Terminal
ZHENG Si-ning1, CHEN Wan-ling1, PENG Yi-ru1, 2*
1. College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou 350007, China 2. Fujian Provincial Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou 350007, China
Abstract：The photoinduced intra-molecular energy transfer in phthalocyanine zinc(Ⅱ) bearing poly (aryl benzyl ether) dendritic substituents with carboxylic terminal was studied by steady-state, time-resolved fluorescence and UV/Vis spectroscopic methods. The result shows that the complexes mainly existed as monomers in dimethyl sulfoxide. The light-harvesting ability of this series of dendritic phthalocyanines increased with the dendron generation under 270 nm. The effects of the dendron generation on the fluorescence characteristics of phthalocyanine cores was significantly, and the fluorescence lifetime and fluorescent quantum yield decreased with the increase of the dendron generation. Intra-molecular energy could be transferred from peripheral dendron acting as an energy hydrazine to the phthalocyanine core during a photo-induced process. With the dendrimer increasing, the intra-molecular energy transfer quantum yield increased. These results obviously indicated that this series of dendritic phthalocyanines is a king of novel compound with light-harvesting structure.
Key words：Phthalocyanine Zinc (Ⅱ);Dendritic substituents;Light-harvesting system;Intra-molecular energy transfer
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