Analyzing the Effects of Protecting Osmolytes on Solute–water Interactions by Solvatochromic Comparison Method: I. Small Organic Compounds
Document Type
Article
Publication Date
2015
Digital Object Identifier (DOI)
https://doi.org/10.1039/C5RA08610H
Abstract
Solvent properties of water (dipolarity/polarizability, hydrogen bond donor (HBD) acidity, and hydrogen bond acceptor (HBA) basicity) in aqueous solutions of osmolytes (sorbitol, sucrose, trehalose, and trimethylamine N-oxide (TMAO)) were studied at different osmolyte concentrations using a solvatochromic comparison method. The solvent properties of aqueous media in the coexisting phases of aqueous dextran–PEG–sodium/potassium phosphate buffer (0.01 M K/NaPB, pH 7.4) two-phase system (ATPS) containing 0.5 M osmolyte additive (sorbitol, sucrose, trehalose, TMAO) and osmolyte-free ATPS were characterized. Partitioning of 30 low molecular weight polar organic compounds was examined in aqueous dextran–PEG–0.01 M K/NaPB ATPS containing 0.5 M sorbitol. The solute-specific coefficients for the compounds examined were determined from the data obtained here and those reported previously. The results obtained demonstrate that the osmolytes examined affect the partition behavior of organic compounds in ATPS by influencing solvent properties of the media and not by direct association with the compounds.
Was this content written or created while at USF?
Yes
Citation / Publisher Attribution
RSC Advances, v. 5, issue 74, p. 59812-59822
Scholar Commons Citation
Ferreira, Luisa A.; Madeira, Pedro P.; Uversky, Vladimir N.; and Zaslavsky, Boris Y., "Analyzing the Effects of Protecting Osmolytes on Solute–water Interactions by Solvatochromic Comparison Method: I. Small Organic Compounds" (2015). Molecular Medicine Faculty Publications. 597.
https://digitalcommons.usf.edu/mme_facpub/597
