title: Photophysical studies of some dyes in aqueous solution of triton X-100.
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.
authors.affiliation: Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700032, India. bhowmikbbju@yahoo.co.in
authors.forename: Benoy B
authors.initials: BB
authors.lastname: Bhowmik
authors.forename: Papia
authors.initials: P
authors.lastname: Ganguly
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D017830:Octoxynol / Q000737:chemistry*; D010619:Phenazines / Q000032:analysis; D012996:Solutions / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013057:Spectrum Analysis; D013816:Thermodynamics
chemical_list: D004396:Coloring Agents; D010619:Phenazines; D012996:Solutions; D017830:Octoxynol; C009195:safranine T