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Spectroscopic analysis of crown ether – surfactant inclusion complexes in aqueous media

R.D.Singh, Rajni Garg

Inclusion complexes of 15-crown-5-ether (CE) with two different surfactants, Sodium dodecyl sulphate (SDS) and Cetyl trimethyl ammonium bromide (CTAB) have been studied in aqueous solution spectroscopically. The molar absorptivity coefficient ‘’ has been determined for the aqueous micellar solutions both in absence and presence of crown ether. The ‘’ varies in the order CTAB/ W  CTAB/ CE/W  SDS/W  SDS/CE/W. An increase in intensity of absorption of surfactants was observed with the increase in the concentration of crown ether. Binding constant, K has been used to analyse the stability of the inclusion complexes. Interaction of crown ether with Sodium dodecyl sulphate has been found to be more favorable as compared to Cetyl trimethyl ammoniumbromide.