Journal
JOURNAL OF LUMINESCENCE
Volume 132, Issue 4, Pages 931-937Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2011.11.027
Keywords
Rhodamine dyes; Solvent-solute interactions; Linear solvation energy relationships; Solvent polarity scale; Dipole moment
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Absorption and emission spectra of two rhodamine dyes with same molecular skeletons and different functional groups have been studied in various isotropic and anisotropic media. The solute photophysical behavior depends strongly on the solvent-solute interactions and solvent microenvironment as well as resonance structures of the rhodamine dyes. In order to understand the effect of intermolecular interactions on spectral behaviors of these dyes and to conceive nature and extend of solvent-solute interactions the spectral variations were analyzed by the linear solvation energy relationships concept. In addition, by means of solvatochromic method the dyes dipole moments variations, from ground to excited states, were investigated in isotropic and anisotropic solvents media. (C) 2011 Elsevier B.V. All rights reserved.
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