PROTOTROPIC EQUILIBRIA OF SOME AROMATIC-AMINES IN MICELLAR SOLUTIONS OF SODIUM DODECYL-SULFATE

被引：20
|
作者：
SARPAL, RS [1 ]
DOGRA, SK [1 ]
机构：
[1] INDIAN INST TECHNOL,DEPT CHEM,KANPUR 208016,UTTAR PRADESH,INDIA
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1993年 / 69卷 / 03期
关键词：
D O I：
10.1016/1010-6030(93)85099-T
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：
The monocation-neutral equilibria of eight aromatic amines were studied in sodium dodecylsulphate in the S0 and S1 state. Apparent pK(a) values for these equilibria increase, reach a maximum value and then decrease with an increase in detergent concentration. Changes observed in the apparent pK(a) values can be explained by the pseudophase ion exchange model. Aromatic ammonium ions are stronger acids in the S1 state, even in micelles, but not to the same extent as observed in aqueous media. Proton-induced fluorescence quenching of the neutral aromatic amines is observed in micellar solutions and fluorometric titrations cannot be used to determine the excited state pK(a) values.
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页码：329 / 335
页数：7
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