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  • Title: Estimation of ground- and excited-state dipole moments of oxazine 1 in liquid and liquid crystalline media.
    Author: Gilani AG, Moghadam M, Zakerhamidi MS.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2011 Jun; 79(1):148-55. PubMed ID: 21440491.
    Abstract:
    The absorption and fluorescence spectra of a laser dye, oxazine-1 (OX1), in liquid and liquid crystalline media were studied at room temperature. The solvatochromic method was used to determine the ground- and excited-state dipole moments by means of Lippert-Mataga, Bakshiev, Kawski-Chamma-Viallet polarity functions. The solvent polarity has no large and regular effect on the spectral behavior of OX1, and thus it might be considered as a poor solvatochromic indicator dye. In addition, applicability of solvatochromic method for this dye in anisotropic media was investigated. On the other hand, nature and degree of the solute-solvent interactions were characterized using correlation of multi-parameter solvent polarity scales. Due to the theoretical restrictions and the dye molecular structure, deviations from the solvatochromic correlation were observed.
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