Formation of new types of porphyrin H- and J-aggregates

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 4TAPP] 6+). Triangular porphyr...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2007-12, Vol.311 (1), p.187-190
Main Authors: Li, Xiangqing, Zhang, Line, Mu, Jin
Format: Article
Language:English
Subjects:
Aggregates
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porphyrins
Self-assembly
Surface physical chemistry
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Summary: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 4TAPP] 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.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2007.06.015