In:
Zeitschrift für Physikalische Chemie, Walter de Gruyter GmbH, Vol. 233, No. 2 ( 2019-02-25), p. 183-199
Abstract:
This manuscript reports the solubilization of two reactive dyes viz. reactive black-5 (RB-5) and reactive black-8 (RB-8) in the micellar media of cationic surfactant, cetyl trimethylammonium bromide (CTAB) by differential UV/visible spectroscopy. Absorption spectra of said dyes in the presence of CTAB provide strong evidence about dye–surfactant interaction. In premicellar region ion association pair is formed between dye and surfactant while in post micellar region dye molecules get accommodated within the micelles. The values of critical micelle concentration (CMC) of CTAB in the presence of dyes, partition coefficient; K x , free energy of partition, ∆ G p , binding constant, K b and free energy of binding, ∆ G b were determined and compared for both dyes. It is, thus, concluded that RB-5 is solubilized to greater extent than RB-8 because of its incorporation in palisade layer of micelle close to micelle-water interface.
Type of Medium:
Online Resource
ISSN:
2196-7156
,
0942-9352
DOI:
10.1515/zpch-2018-1142
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2019
detail.hit.zdb_id:
201103-7
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