title: Studies on the electronic absorption spectra of some monoazo derivatives.
abstract: The electronic absorption spectra of a series of azo dye compounds containing -Cl, -SO3H and -OH groups were recorded in twenty one solvents with different polarities. The solvents were selected to cover a wide range of parameters (refractive index, dielectric constant and hydrogen bonding ability). Solvent-induced effect on the maximum absorption band frequencies of azo dye compounds are described in terms of solute-solvent interactions. Multiple linear regression equation for νmax was performed using polarizability-polarity parameters and Kamlet-Taft solvatochromic parameters. The results help to assign the solvent-solute interactions and the solvatochromic potential of the investigated compounds. It is concluded that the electronic of the substituent and hydrogen bonding acceptor ability of the solvents are the major factors to the interaction in solutions.
authors.affiliation: Bitlis Eren University, Faculty of Arts & Sciences, Department of Physics, 13000 Bitlis, Turkey. yadigar.gulseven@gmail.com
authors.forename: Yadigar
authors.initials: Y
authors.lastname: Gülseven Sıdır
authors.forename: Isa
authors.initials: I
authors.lastname: Sıdır
authors.forename: Erol
authors.initials: E
authors.lastname: Taşal
authors.forename: Emel
authors.initials: E
authors.lastname: Ermiş
mesh_terms: D000042:Absorption; D001391:Azo Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004583:Electrons; D000431:Ethanol / Q000737:chemistry; D016014:Linear Models; D012997:Solvents / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D012997:Solvents; D000431:Ethanol; C009850:azobenzene; D004121:Dimethyl Sulfoxide