Beletskiy Evgeny V, Kass Steven R
Department of Chemistry, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455, USA.
Org Biomol Chem. 2015 Oct 14;13(38):9844-9. doi: 10.1039/c5ob01450f.
A series of neutral anion receptors with one to three thiourea arms were synthesized and their binding to tetrabutylammonium chloride, acetate, and dihydrogen phosphate salts in aqueous DMSO mixtures was examined. The three-armed thiourea host was found to strongly and selectively bind H2PO4(-) even in DMSO solutions containing up to 30% water. This enabled the dihydrogen phosphate salt to be extracted from water into chloroform in its dibasic form despite the high heat of the hydration of HPO4(2-).
合成了一系列带有一至三个硫脲臂的中性阴离子受体，并研究了它们在二甲基亚砜（DMSO）与水的混合溶液中与四丁基氯化铵、醋酸盐和磷酸二氢盐的结合情况。结果发现，即使在含水量高达30%的DMSO溶液中，三臂硫脲主体仍能强烈且选择性地结合H2PO4(-)。尽管HPO4(2-)的水合热很高，但这使得磷酸二氢盐能够以其二元形式从水相萃取到氯仿相中。
