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, X (2) (L) , solvation index δ(s2), exchange constant K(12) were calculated for the binary mixtures, ACN+MEOH, DMSO+CCl(4) and CCl(4)+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.
Subject(s)
Acetonitriles/chemistry , Benzene Derivatives/chemistry , Carbon Tetrachloride/chemistry , Dichloroethylenes/chemistry , Dimethyl Sulfoxide/chemistry , Imines/chemistry , Methanol/chemistry , Molecular Structure , Schiff Bases/chemistry , Solvents/chemistry , Spectrometry, FluorescenceABSTRACT
This paper describes the synthesis of complexes of the type MB2. 2H2O and CuBL.2H2O where BH = alpha-(2-hydroxyphenyl)-N-(1-phenyl-2-nitroethyl)-nitrone, M = copper(II)/cobalt(II)/nickel(II) and LH = salicylaldehyde/salicylaldoxime/8-hydroxyquinoline/2-hydroxypyridine. The magnetic moment, ligand field spectra, thermal and ESR studies reveals that these dihydrates possess octahedral geometry. The antimicrobial studies of these complexes against several microorganisms such as Staphylococcus aureus, Escherichia coli, Klebsiella aerogenes, Salmonella typhi and Pseudomonas sp. have been tested and reported in comparison with ceftazidime standard.
