Effect of anisotropic and isotropic solvent on the dipole moment of coumarin dyes

被引：27

作者：

Zakerhamidi, M. S. ^{[1
]}

Ghanadzadeh, A. ^{[1
,2
,3
]}

Moghadam, M. ^{[2
]}

机构：

[1] Univ Tabriz, Res Inst Appl Phys & Astron, Tabriz, Iran

[2] Univ Guilan, Fac Sci, Dept Chem, Rasht, Iran

[3] Univ Tabriz, Excellence Ctr Photon, Tabriz, Iran

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2011年 / 78卷 / 03期

关键词：

Coumarin dyes; Dipole moment; Anisotropic environments; Nematic liquid crystal; EXCITED-STATE; FLUORESCENCE-SPECTRA; SOLVATOCHROMIC SHIFTS; ELECTRONIC SPECTRA; LASER-DYES; NILE-RED; ABSORPTION; MOLECULES;

D O I：

10.1016/j.saa.2010.12.002

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The ground state (mu(g)) and the excited state (mu(e)) dipole moments of two coumarin laser dyes, coumarin 440 and 460, were studied at room temperature in various solvents, viz., general solvents, alcohols and liquid crystals at 298K. In this work, we report dipole moment of laser dyes in different anisotropic (liquid crystal) and isotropic environments for understanding the effects of environments on the molecular dipole moment and comparing them. Ground and excited state dipole moments of coumarin dyes were evaluated by means of solvatochromic shift method. It was observed that dipole moment values of excited states (mu(e)) were higher than the corresponding ground state values (mu(g)) in all media. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：961 / 966

页数：6

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