文献类型：期刊文献

英文题名：Formation of new types of porphyrin H- and J-aggregates

作者：Li, Xiangqing[1]; Zhang, Line[1]; Mu, Jin[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Dept Chem, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2007

卷号：311

期号：1-3

起止页码：187

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20074510906858);WOS:【SCI-EXPANDED(收录号:WOS:000251527400026)】；

语种：英文

外文关键词：porphyrins; self-assembly; aggregates

摘要：A new type of porphyrin H- and J-aggregates was formed by simply mixing aqueous solutions of two kinds of porphyrins with opposite charges, tetrakis(4-sulfonatophenyl)porphyrin cobalt(II) ([CoTPPS](4-)) and protonated tetrakis(4-N,N,N-trimethylanilinium)porphyrin ([H(4)TAPPI](6+)). Triangular porphyrin aggregates and spherical porphyrin aggregates were observed by TEM. The formation mechanisms of the aggregates are discussed. Optical properties of the aggregates were investigated by UV-vis spectra and fluorescence spectra. The absorption intensity and the emission intensity of the solution placed for 72 h increase a little, which could be caused by the formation of the aggregates with ordered structures in the system. The materials were potential in constructing the functional composite devices to improve the light energy conversion. 2007 Elsevier B.V. All rights reserved.