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Modulation of Intramolecular Charge Transfer Emission Inside Micelles: A Fluorescence Probe for Studying Microenvironment of Micellar Assemblies

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Abstract

Modulation of intramolecular charge transfer reaction of ethyl ester of N,N-Dimethylaminonaphthyl-(acrylic)-acid (EDMANA) in anionic sodium dodecyl sulfate (SDS), cationic cetyltrimethylammonium bromide (CTAB) and non-ionic p-tert-octylphenoxy polyoxyethanol (Triton-X 100, TX-100) micelles has been addressed using steady state and time resolved spectroscopy. The interaction of the CT probe EDMANA with micelles and its location inside the micelles have been investigated by the study of fluorescence spectral band position of EDMANA in micelle, the effective polarity of micelle-water interface and cetyl pyridinium chloride induced fluorescence quenching measurement. The effects of urea on the properties of the micelles such as Critical Micelle Concentration and the interaction between EDMANA and micelles have been explored using EDMANA as emission probe.

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Acknowledgement

AS and BKP thanks CSIR, New Delhi, for Senior Research Fellowship. We appreciate the cooperation received from Prof. T. Ganguly of IACS, Kolkata for his kind help in lifetime measurements. This work is supported by grants from DST, India (Project no. SR/S1/PC/26/2008) and CSIR, India (Project no. 01(2161)07/EMR-II).

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  1. Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata, 700009, India

    Anuva Samanta, Bijan Kumar Paul & Nikhil Guchhait

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  1. Anuva Samanta
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Correspondence to Nikhil Guchhait.

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Samanta, A., Paul, B.K. & Guchhait, N. Modulation of Intramolecular Charge Transfer Emission Inside Micelles: A Fluorescence Probe for Studying Microenvironment of Micellar Assemblies. J Fluoresc 22, 289–301 (2012). https://doi.org/10.1007/s10895-011-0959-3

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