UV-spectral changes for some azo compounds in the presence of different solvents

SIDIR Y. G., SIDIR İ., Berber H., TAŞAL E.

JOURNAL OF MOLECULAR LIQUIDS, vol.162, no.3, pp.148-154, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 162 Issue: 3
  • Publication Date: 2011
  • Doi Number: 10.1016/j.molliq.2011.07.002
  • Journal Name: JOURNAL OF MOLECULAR LIQUIDS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.148-154
  • Keywords: Azo dyes, Linear solvation energy relationship, Solvatochromism, Absorption spectra, ELECTRONIC-ABSORPTION-SPECTRA, SOLAR PHOTOCATALYTIC DEGRADATION, DISPERSE DYES, AZOBENZENE, DERIVATIVES, POLYMER, FILMS
  • Anadolu University Affiliated: Yes

Abstract

The electronic absorption spectra of four azo dyes with different substituents (such as Cl, I, OH) are determined at room temperature in twenty-one solvents with different polarities. The electronic transitions of azo dyes are interpreted. Linear solvation energy relationships have been investigated for solvatochromic behaviors and solute-solvent interactions of azo dyes. Linear solvation energy relationships were performed by multiple linear regression analysis using dielectric function, refractive index function and Kamlet-Taft parameters. We have observed that the hydrogen bonding acceptor ability and the induction-dispersive forces of solvent molecules have caused the bathochromic shift in absorption maxima of azo dyes. (C) 2011 Elsevier B.V. All rights reserved.