title: Electronic spectral studies of some fluorescent probes: a comparison of two approaches.
abstract: Schiff base derivatives were synthesized and characterized by NMR spectra, mass and CHN analysis. The fluorescence properties of these dyes are strongly solvent dependent and the wavelength of maximum fluorescence emission shifts to red. The Kamlet-Taft and Catalan's solvent scales were found to be the most suitable for describing the solvatochromic shifts of the absorption and fluorescence emission. From the NMR chemical shifts and DFT studies, it was found that the azomethine hydrogen is anti to the amine aryl ring i.e., these dyes exist in anti conformation. DFT calculation was also carried out to determine the orientation of hydroxyl group in more stabilized minimum energy conformation.
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar, Tamilnadu 608002, India.
authors.forename: C
authors.initials: C
authors.lastname: Anbuselvan
authors.forename: J
authors.initials: J
authors.lastname: Jayabharathi
authors.forename: V
authors.initials: V
authors.lastname: Thanikachalam
authors.forename: K
authors.initials: K
authors.lastname: Jayamoorthy
mesh_terms: D000042:Absorption; D004583:Electrons; D005456:Fluorescent Dyes / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D005456:Fluorescent Dyes; D012545:Schiff Bases; D012997:Solvents