Rapid estimation of octanol-water partition coefficients using synthesized vesicles in electrokinetic chromatography
Rapid estimation of octanol-water partition coefficients using synthesized vesicles in electrokinetic chromatography
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DOI：
10.1016/s0021-9673(02)00352-7
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发表时间：
2002-07-12
影响因子：
4.1
通讯作者：
Foley, JP
中科院分区：
文献类型：
--
作者：
Klotz, WL;Schure, MR;Foley, JP
用表面活性剂十六烷基三甲基溴化铵（CTAB）、辛基硫酸钠（SOS）和双链阴离子表面活性剂琥珀酸双（2-乙基己基）酯磺酸钠（AOT）合成囊泡，利用囊泡电动色谱（VEKC）间接测定正辛醇-水分配系数（log P-o/w）。通过关联log P-o/w和保留因子的对数（log k '）并比较校准，评估了具有不同官能团的各种小有机分子、农药和有机酸。线性溶剂化能关系（LSER）分析进行了描述的泡囊系统的保留行为，并比较了辛醇-水分配。与正辛醇-水分配模型相比，使用CTAB-SOS囊泡的囊泡相互作用的溶质氢键捐赠行为略有不同。AOT囊泡和正辛醇-水分配系统表现出相似的分配特性。VEKC提供快速分离，用于使用CTAB-SOS囊泡测定log P-o/w，范围为0.5至5，使用AOT囊泡测定log P-o/w，范围为0至5.5。(C)2002 Elsevier Science B. V.保留所有权利。
Vesicle electrokinetic chromatography (VEKC) using vesicles synthesized from the oppositely charged surfactants cetyltrimethylammonium bromide (CTAB) and sodium octyl sulfate (SOS) and from the double-chained anionic surfactant bis(2-ethylhexyl) sodium sulfosuccinate (AOT) was applied to the indirect measurement of octanol-water partition coefficients (log P-o/w). A variety of small organic molecules with varying functional groups, pesticides, and organic acids were evaluated by correlating log P-o/w and the logarithm of the retention factor (log k') and comparing the calibrations. A linear solvation energy relationship (LSER) analysis was conducted to describe the retention behavior of the vesicle systems and compared to that of octanol-water partitioning. The solute hydrogen bond donating behavior is slightly different with the vesicle interactions using CTAB-SOS vesicles as compared to the octanol-water partitioning model. The AOT vesicle and octanol-water partitioning systems showed similar partitioning characteristics. VEKC provides rapid separations for determinations of log P-o/w in the range of 0.5 to 5 using CTAB-SOS vesicles and 0 to 5.5 using AOT vesicles. (C) 2002 Elsevier Science B.V. All rights reserved.