期刊
JOURNAL OF FLUORESCENCE
卷 20, 期 6, 页码 1181-1189出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-010-0666-5
关键词
N-(2-methylthiophenyl)-2-hydroxy-1-naphthaldimine; Schiff base; Solvatochromism; Preferential solvation; Binary liquid mixtures; Absorption and fluorescence spectroscopy
资金
- CSIR, Government of India
- UGC, Government of India
- UGC
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, X (2) (L) , solvation index delta(s2), exchange constant K-12 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 (epsilon), refractive index (n) and it was found to be 1.25.
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