title: Estimation of ground- and excited-state dipole moments of oxazine 1 in liquid and liquid crystalline media.
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.
authors: Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran. aggilani@guilan.ac.ir
authors: A Ghanadzadeh
authors: AG
authors: Gilani
authors: M
authors: M
authors: Moghadam
authors: M S
authors: MS
authors: Zakerhamidi
mesh_terms: D000042:Absorption; D016880:Anisotropy; D001554:Benzene / Q000737:chemistry; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004560:Electricity; D050866:Liquid Crystals / Q000737:chemistry*; D008968:Molecular Conformation; D010078:Oxazines / Q000737:chemistry*; D012044:Regression Analysis; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence
chemical_list: D010078:Oxazines; D012997:Solvents; C025904:oxazine 1; D001554:Benzene; D004121:Dimethyl Sulfoxide