|
KMID : 0043319810040020075
|
|
Archives of Pharmacal Research
1981 Volume.4 No. 2 p.75 ~ p.84
|
|
|
Studies on the Interaction of Azo Dyes with Cationic Surfactant (I)
|
|
Cho YM
Lee WK/Kim BK
|
|
|
Abstract
|
|
|
|
As the cetyltrimethyl ammonium bromide (CTAB) concentration increases to 2 X 10-4M the absorption maximum of ethyl orange (EO) makes a blue shift from 475nm to 395nm. At higher concentration of CTAB than 2 X 10-4M the absorption maximum shifts to higher wavelength than 395nm. A new peak at 395nm is shown to result from the mixed micelle due to dye stacking interaction rather than from a change in dye geometry. Because Raman spectra of EO on interaction with varying amount of CTAB are similar to that of EO in water, EO retains trans azo type on interaction with CTAB. There is a change of c.m.c.s of CTAB for the mixed micelle in the presence of salt. The effect of added salt on c.m.c. of CTAB for the mixed micelle is given that the logarithm of the c.m.c. is a linear function of the logarithm of the sum of the c.m.c. and the concentration of added salt.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
  
|