title: Morphological transition of the host-structure influences solvent-relaxation: a wavelength-selective fluorescence exploration through environment-sensitive intramolecular charge transfer photophysics.
abstract: Here, we report the modulation of photo-induced intramolecular charge transfer (ICT) photophysics of N,N-dimethylaminonaphthyl-acrylo-nitrile (DMANAN) associated with sphere-to-rod structural transition of SDS micelles induced by increasing ionic strength of the medium. Emphasis is rendered on the exploration of solvent-relaxation associated with this transition on the basis of wavelength-selective fluorescence technique which includes monitoring of red-edge excitation shift (REES) and excitation/emission anisotropy profiles. Based on micropolarity determination and organization of solvent water around the probe microenvironment we argue that the present results advocate for rod-shaped micelles to be a better mimic for membrane bilayers than spherical micelles.
authors.affiliation: Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, West Bengal, India.
authors.forename: Bijan Kumar
authors.initials: BK
authors.lastname: Paul
authors.forename: Nikhil
authors.initials: N
authors.lastname: Guchhait
mesh_terms: D015057:1-Naphthylamine / Q000031:analogs & derivatives / Q000737:chemistry; D016880:Anisotropy; D004777:Environment; D005456:Fluorescent Dyes / Q000737:chemistry*; D008823:Micelles; D008954:Models, Biological; D015394:Molecular Structure; D009570:Nitriles / Q000737:chemistry; D044367:Phase Transition; D010777:Photochemistry; D010825:Physics / Q000379:methods; D012997:Solvents / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods; D055672:Static Electricity; D014867:Water / Q000737:chemistry
chemical_list: D005456:Fluorescent Dyes; D008823:Micelles; C559461:N,N-dimethylaminonapthyl-(acrylo)-nitrile; D009570:Nitriles; D012997:Solvents; D014867:Water; D015057:1-Naphthylamine