Different J-Type Aggregates of meso-

Different J-Type Aggregates of meso-Tetrakis (4-hydroxyphenyl) porphyrin (H2THPP) Formed in Different Solvents

The aggregation of meso-tetrakis(4-hydroxyphenyl)porphyrin (H2THPP) in dimethylformamide (DMF)-water solution and in DMF-chloroform solution was studied by UV-vis absorption spectroscopy. The red shift of Soret band indicates the formation of J-type aggregates of H2THPP in these two solutions. However, different shift extent of Soret band, 12 nm in DMF-water solution and 32 nm in DMF-chloroform solution, implies structural difference between these two J-type aggregates. The hydrogen bond between hydroxyl group and N-H bonds in porphyrin ring is thought as the main cause to the formation of J-type aggregate in DMFchloroform solution, whereas the π-σ interaction between two adjacent porphyrin cores is thought as the main cause of the formation of J-type aggregate in DMF-water solution

作 者： Ying Hui ZHANG Yang WU   作者单位： Department of Chemistry, Nankai University, Tianjin 300071  刊 名： 中国化学快报（英文版）  ISTIC SCI 英文刊名： CHINESE CHEMICAL LETTERS  年，卷(期)： 2005 16(4)  分类号：   关键词： H2THPP   aggregation   UV-Vis absorption spectrum  

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