Volumetric, Viscometric, and 1H NMR Studies
on Caffeine, Theophylline, and Theobromine in Aqueous Solutions of
MgCl2 at Temperatures T = (288.15 to 318.15)
K and at Pressure p = 101.3 kPa
Posted on 2017-10-20 - 14:49
Apparent
molar volumes (V2,ϕ)
and viscosity B-coefficients for xanthine drugs (caffeine,
theophylline, and theobromine) in aqueous (0.09999–0.99989)
mol·kg–1 MgCl2 solutions have been
determined from measured densities ρ and viscosities η,
respectively at T = (288.15 to 318.15) K and at pressure p = 101.3 kPa. These studies indicate the decrease in solubilization
of xanthine drugs with increasing ionic strengths of MgCl2 solutions. The results have also been interpreted in terms of structure
making/breaking ability of solutes. Spectroscopic studies also support
that hydrophilic–ionic interactions are greater at lower concentrations
of MgCl2, which descend and finally become weaker at higher
concentrations of MgCl2. This type of behavior may also
be understood in terms of a large dehydration effect.
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Banipal, Tarlok S.; Beri, Aashima; Banipal, Parampaul K. (2017). Volumetric, Viscometric, and 1H NMR Studies
on Caffeine, Theophylline, and Theobromine in Aqueous Solutions of
MgCl2 at Temperatures T = (288.15 to 318.15)
K and at Pressure p = 101.3 kPa. ACS Publications. Collection. https://doi.org/10.1021/acs.jced.7b00520
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