Solvation consequences of polymer PVP with biological buffers MES,MOPS, and MOPSO in aqueous solutions |
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| Institution: | 1. College of Environmental and Chemical Engineering, Xi''an Polytechnic University, Xi''an 710048, China;2. School of Chemical Engineering, Xi''an University, Xi''an 710065, China;3. Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China;1. Botswana International University of Science and Technology, Private Mail Bag 16 Palapye, Botswana;2. Laboratoire de Biophysique, Département de Physique, Faculté des Sciences, Université de Yaoundé I, B.P. 812 Yaoundé, Cameroun |
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| Abstract: | Densities and viscosities were measured for the aqueous buffer (MES, MOPS, or MOPSO) solutions containing different concentrations of polyvinylpyrrolidone (PVP) (5, 10, 15, 20 and 30) mass% at temperatures from (298.15 to 318.15) K under atmospheric pressure. The DFT calculations were also performed and the binding energies of the possible (PVP + buffer) complexes were obtained. The experimental and computational results reveal the interactions of the PVP with the constituent compounds in the aqueous buffer solutions. Additionally we have explored the solvation behavior of the buffers by measuring the densities and the viscosities data of the aqueous buffer solutions from (0.0 to 1.0) mol · kg−1 at temperatures from (298.15 to 318.15) K. The viscosity results were correlated with the Jones–Dole equation. The correlated results confirmed that all the investigated buffers behave as Kosmotropes (structure makers). |
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| Keywords: | PVP Biological buffers Kosmotrope Solvation DFT |
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