On the structure of an aqueous propylene glycol solution

Using a combination of neutron diffraction and empirical potential structure refinement computational modelling, the interactions in a 30 mol. % aqueous solution of propylene glycol (PG), which govern both the hydration and association of this molecule in solution, have been assessed. From this work...

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Veröffentlicht in:The Journal of chemical physics 2016-12, Vol.145 (22), p.224504-224504
Hauptverfasser: Rhys, Natasha H., Gillams, Richard J., Collins, Louise E., Callear, Samantha K., Lawrence, M. Jayne, McLain, Sylvia E.
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container_end_page 224504
container_issue 22
container_start_page 224504
container_title The Journal of chemical physics
container_volume 145
creator Rhys, Natasha H.
Gillams, Richard J.
Collins, Louise E.
Callear, Samantha K.
Lawrence, M. Jayne
McLain, Sylvia E.
description Using a combination of neutron diffraction and empirical potential structure refinement computational modelling, the interactions in a 30 mol. % aqueous solution of propylene glycol (PG), which govern both the hydration and association of this molecule in solution, have been assessed. From this work it appears that PG is readily hydrated, where the most prevalent hydration interactions were found to be through both the PG hydroxyl groups but also alkyl groups typically considered hydrophobic. Hydration interactions of PG dominate the solution over PG self-self interactions and there is no evidence of more extensive association. This hydration behavior for PG in solutions suggests that the preference of PG to be hydrated rather than to be self-associated may translate into a preference for PG to bind to lipids rather than itself, providing a potential explanation for how PG is able to enhance the apparent solubility of drug molecules in vivo.
doi_str_mv 10.1063/1.4971208
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subjects Computer Simulation
Hydration
Hydrophobic and Hydrophilic Interactions
Hydroxyl groups
Lipids
Models, Chemical
Molecular Structure
Neutron Diffraction
Physics
Propylene
Propylene Glycol - chemistry
Solutions - chemistry
Water - chemistry
title On the structure of an aqueous propylene glycol solution
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