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Indian Journal of Advances in Chemical Science Volume: 5,
Issue 4: , September 2017 |
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ISSN No.: 2320-0898 (Print);
2320-0928 (Electronic)
DOI:
10.22607/IJACS.2017.504003
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Research Article
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Solute-solute and
Solute-solvent Interactions of Paracetamol in Aqueous Solutions of
β-cyclodextrin at Different Temperatures: A Volumetric and
Viscometric Approach |
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Abhijit Sarkar,
Habibur Rahaman, Uttam Kumar Singha, Biswajit Sinha* |
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ABSTRACT |
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The densities and viscosities of
paracetamol in aqueous b-cyclodextrin solutions with several molal
concentrations m = (0.001-0.007) mol kg−1
of b-cyclodextrin were determined
at T = 298.15-318.15 K under atmospheric pressure. The inclusion has
been studied using ultraviolet-visible spectroscopy. Using
experimental data apparent molar volume (φV), standard partial molar
volume (0Vϕ),
the slope (SV*),
standard isobaric partial molar expansibility (ϕE0)
and its temperature dependence (-E0PT),
the viscosity B-coefficient, and solvation number (Sn) were
determined. Free energies of activation of viscous flow per mole of
the solvents (μ 10)
and the solute (μ 20)
are also calculated. Various results revealed that the solutions are
characterized predominantly by solute-solvent interactions and
paracetamol behaves as a long-range structure maker. |
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Key words: Apparent molar
volumes, Viscosity B-coefficients, Paracetamol, Aqueous b-cyclodextrin
solutions, Solvation number, Ultraviolet-visible spectroscopy. |
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Copyright © 2012
KROS Publications |
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