Effects of cyclodextrins on the complexation between Methylene Blue and tetrakis(4-sulfonatophenyl)porphyrin in aqueous solutions

被引：16
|
作者：
Hamai, S [1 ]
Satou, H [1 ]
机构：
[1] Akita Univ, Fac Educ & Human Studies, Dept Chem, Akita 0108502, Japan
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2001年 / 57卷 / 09期
关键词：
cyclodextrins; Methylene Blue; tetrakis(4-sulfonatophenyl)porphyrin; molecular complexes; absorption spectra; fluorescence spectra;
D O I：
10.1016/S1386-1425(01)00409-7
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
In aqueous solutions buffered at pH 10.1, Methylene Blue (MB) forms a complex with tetrakis(4-sulfonatophenyl)porphyrin (TSPP). The equilibrium constant for the formation of the MB-TSPP complex has been evaluated to be 2.35 x 10(5) mol(-1) dm(3) from the fluorescence quenching of MS by TSPP. Effects of alpha-, beta-, and gamma -cyclodextrin (CD), and heptakis(2,3,6-tri-O-methyl)-beta -cyclodextrin on the complexation between MB and TSPP have been examined by means of absorption and fluorescence spectroscopy. The binding of CDs to TSPP and/or MB in the MB-TSPP complex causes the dissociation of the MB-TSPP complex. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：1745 / 1750
页数：6
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