Solvatochromism,Preferential Solvation of 2,3-Bis(Chloromethyl)-1,4-Anthraquinone in Binary Mixtures and the Molecular Recognition Towards <Emphasis Type="Italic">p</Emphasis>-Tert-Butyl-Calix[4]arene |
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Authors: | V Sasirekha P Vanelle T Terme C Meenakshi M Umadevi V Ramakrishnan |
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Institution: | (1) Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai, 625 021, India;(2) Department of Organic Chemistry, UMR CNRS 6517, Faculty of Pharmacy, University of Méditerranée, 27 Bd Jean Moulin, 13385 Marseille Cedex 5, France;(3) Directorate of Distance Education, Madurai Kamaraj University, Madurai, 625 021, India;(4) Department of Physics, Mother Teresa Women’s University, Kodaikanal, 624 102 Tamil Nadu, India |
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Abstract: | Optical absorption and fluorescence emission spectra of 2,3-bis(chloromethyl)-1,4-anthraquinone (DCMAQ) in single solvents
namely, carbon tetrachloride, acetonitrile, chloroform, propan-2-ol and its binary mixtures carbon tetrachloride/chloroform,
chloroform/acetonitrile, chloroform/propan-2-ol] have been investigated. The preferential solvation of DCMAQ in above mixtures
has been studied by monitoring the absorption and fluorescence spectra of DCMAQ. The spectral features indicate that DCMAQ
is preferentially solvated by CHCl3 in the above mixtures. This can be elucidated from the local mole fraction, non-linearity in transition energy plot, preferential
solvation index (δ
s2) and (f
2/f
1) values. Molecular recognition properties of p-tert-butylcalix4]arene (tBC) to DCMAQ via hydrogen bonding and π–π interaction were sensed successfully on the basis of
absorption and fluorescence emission spectroscopies, by which the stoichiometry ratio and the binding constant of the tBC–DCMAQ
complex were determined. |
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Keywords: | 2 3-Bis(chloromethyl)-1 4-anthraquinone Binary mixtures Fluorescence emission Optical absorption Solute– solvent interaction Solvent– solvent interaction Preferential solvation |
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