Substituent and solvent effects on the spectroscopic properties and dipole moments of hydroxyl benzaldehyde azo dye and related Schiff bases

被引:53
|
作者
Zakerhamidi, M. S. [1 ]
Nejati, K. [2 ]
Sorkhabi, Sh. Golghasemi [1 ]
Saati, M. [2 ]
机构
[1] Univ Tabriz, Res Inst Appl Phys & Astron, Tabriz, Iran
[2] Payam Noor Univ, Dept Chem, Tehran, Iran
关键词
Salicylaldehyde azo; Schiff base; Excited state intramolecular proton transfer; Enol-imine; Keto-enamine; Tautomerism; SOLVATION ENERGY RELATIONSHIPS; THERMAL-PROPERTIES; PROTON-TRANSFER; PI-STAR; TAUTOMERISM; ABSORPTION; COMPLEXES; SPECTRA; COPPER; SCALE;
D O I
10.1016/j.molliq.2013.01.021
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Absorption and emission spectra of salicylaldehyde azo and related two Schiff bases with the same molecular skeletons and different functional groups have been studied in various solvents with different polarities. The solute's photo-physical behavior depends strongly on the solvent-solute interactions and solvent microenvironment as well as resonance structures of the salicylaldehyde azo and related Schiff bases. In order to understand the effects of intermolecular interactions on spectral behavior of these substances and to conceive nature and extent of solvent-solute interactions the spectral variations were analyzed by the linear solvation energy relationship concept. In addition, the variations of dye dipole moments, from ground to excited states, were investigated in solvent media by means of solvatochromic method. (C) 2013 Elsevier B.V. All rights reserved.
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页码:225 / 234
页数:10
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