Solvatochromic and Preferential Solvation Studies on Schiff Base 1,4-Bis(((2-Methylthio)Phenylimino)Methyl) Benzene in Binary Liquid Mixtures |
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Authors: | G. Suganthi S. Sivakolunthu V. Ramakrishnan |
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Affiliation: | (1) Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai, 625 021, India;(2) Department of Inorganic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625 021, India |
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Abstract: | The solvatochromic behavior of the 1,4-bis(((2-methylthio) phenylimino)methyl) benzene [BMTPMB] in single solvents and binary mixtures were investigated. Fluorescence spectra show the dual emission due to twisted intramolecular charge transfer (TICT) state. The preferential solvation parameters: local mole fraction, X2L, solvation index δs2, exchange constant K12 were calculated for the binary mixtures, ACN+MEOH, DMSO+CCl4 and CCl4+1,2 DCE. The dipole moment ratios between ground and excited states were deduced using the solvatochromic shifts of absorption and fluorescence spectra as a function of dielectric constant (ε), refractive index (n) and it was found to be 1.25. |
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