Solubilization of Phenol in an Intercalated Surfactant Bilayer

Venkataraman, NV and Vasudevan, S (2003) Solubilization of Phenol in an Intercalated Surfactant Bilayer. In: Journal of Physical Chemistry B, 107 (22). pp. 5371-5381.

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Abstract

Solubilization of phenol molecules in an intercalated surfactant bilayer, formed within the galleries of an inorganic layered solid, {CdPS_3}, is reported. The bilayer, formed by grafting of cetyl trimethylammonium (CTA) ions to the internal surface of {CdPS_3}, functionlizes the surface, converting it from a hydrophilic to a hydrophobic surface. The CTA ions being devoid of functional groups, the interaction between the guest phenol molecules and the methylene chains of the bilayer are dispersive in nature. It is shown that there are two phases of the phenol-solubilized intercalated bilayer, distinguishable by their interlayer lattice spacing and corresponding to solubilized phenol to intercalated CTA ion concentration ratios less than 0.5 and greater. The presence of the guest phenol, which is rotationally mobile, induces conformational disorder in the methylene chains of the intercalated bilayer. The nature and extent of conformational disorder have been studied using infrared and Raman vibrational spectroscopy and {^{13}C CP-MAS NMR} spectroscopy. Conformational disorder in the two phases of the phenol-solubilized bilayer is different, and the observed differences in the interlayer lattice spacings have been related to differences in the nature of conformational disorder.

Item Type:	Journal Article
Publication:	Journal of Physical Chemistry B
Publisher:	American Chemical Society
Additional Information:	The copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	29 Jun 2007
Last Modified:	18 Jan 2012 06:03
URI:	http://eprints.iisc.ac.in/id/eprint/11332

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