Spectral features of the aggregation of TPPS4 in the presence of cation surfactant

被引:16
作者
Huang, CZ [1 ]
Li, YF [1 ]
Huang, XH [1 ]
Liu, SP [1 ]
机构
[1] SW Normal Univ, Inst Environm Chem, Chongqing 400715, Peoples R China
关键词
cetyltrimethylammoniumbromide (CTMAB); meso-tetrakis(p-sulfonatophenyl)porphine (TPPS4); absorption spectrum; fluorescence spectrum; resonance light-scattering spectrum;
D O I
10.3866/PKU.WHXB19980812
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This paper presents the spectroscopic features of the aggregation of meso- tetrakis(p-sulfonatophenyl)porphine (TPPS4) induced by cetyltrimethylammoniumbromide (CTMAB). Spectra studied involve absorption, fluorescence and resonance light-scattering. The results show that J-type aggregates of TPPS4 can be produced with two TPPS4 molecules being stacked in the structure of staggering card-deck when the concentration of CTMAB is lower than 1.0x10(-5) mol.L-1 The J-type aggregates of TPPS4 still exist with a hypsochromic Soret band when the concentration of CTMAB is in the range 1.0x10(-5) similar to 1.0x10(-4) mol.L-1. The J-type aggregates, however, disappear with the appearance of the D-2h absorption features of free base porphyrin if the concentration of CTMAB is higher than 1.0x10(-4) mol.L-1. Compared with the spectroscopic features of the Gee base porphyrin in water medium, the Soret band of the free base porphyrin in CTMAB medium is red-shifted.
引用
收藏
页码:731 / 736
页数:6
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