Photophysical studies of some dyes in aqueous solution of triton X-100 |
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Authors: | Bhowmik Benoy B Ganguly Papia |
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Affiliation: | Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700032, India. bhowmikbbju@yahoo.co.in |
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Abstract: | The spectral (both absorption and fluorescence) and photoelectrochemical studies of a few selective dyes, namely, anionic erythrosin B, neutral riboflavin and cationic safranin O have been carried out in aqueous solution of triton X-100, a neutral surfactant. The results show that the ionic dyes, erythrosin B and safranin O form 1:1 electron donor-acceptor (EDA) or charge-transfer (CT) complexes with triton X-100 both in the ground and excited states, whereas neutral dye riboflavin in its excited state forms 1:1 complex with triton X-100. In these complexes, the dyes act as electron acceptors whereas triton X-100 acts as an electron donor. The fluorescence spectra of erythrosin B and safranin O in presence of triton X-100 show enhancement of fluorescence intensity with red and blue shifts respectively while riboflavin shows normal quenching of fluorescence. A good correlation has been found among photovoltage generation of the systems consisting of these dyes and triton X-100, spectral shift due to complex formation and thermodynamic properties of these complexes. |
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Keywords: | Dye– surfactant interaction Dyes: erythrosin B Riboflavin and safranin O Surfactant: triton X-100 Spectral studies Photogalvanic effect |
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