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Title: Behaviour of a surface active cyanine dye in water and surfactant solutions
Authors: Mishra, J K
Sahay, A K
Mishra, B K
Issue Date: Oct-1991
Publisher: NISCAIR-CSIR, India
Abstract: N-Cetyl-4-(p-N,N-dimethylamino)styrylpyridinium bromide (I) has been used as a probe to study the effect of hydrophonic chain in organising the dye molecule in water medium. (I) forms a condensed monolayer on water surface covering 65 Å2 /molecule. An L- L type of aggregation has been proposed on the basis of the calculated area of the molecule. A hypsochromic shift in the absorption of (I) in aqueous medium in the presence of CTAB (below CMC) suggests formation of a dimer. But above the CMC of CTAB, (I) forms aggregates with CTAB Ieading to a mixed micelle formation. However, in revers d micelle, a bathochromic shift is observed with increasing water concentration. This shift reveals a J-type aggregation of the dye at the interface.
Page(s): 886-889
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.30A(10) [October 1991]

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