SOLVATOCHROMIC STUDIES OF THE SURFACE POLARITY OF SILICA UNDER NORMAL-PHASE CONDITIONS

被引：17

作者：

LI, ZB ^{[1
]}

RUTAN, SC ^{[1
]}

机构：

[1] VIRGINIA COMMONWEALTH UNIV,DEPT CHEM,RICHMOND,VA 23284

来源：

ANALYTICA CHIMICA ACTA | 1995年 / 312卷 / 02期

基金：

美国国家科学基金会;

关键词：

SILICA; SOLVATOCHROMIC COMPARISON METHOD; LIQUID CHROMATOGRAPHY; HYDROGEN BONDING; POLARITY;

D O I：

10.1016/0003-2670(95)00206-F

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The solvatochromic method has been used to quantify the dipolarity-polarizability, hydrogen-bonding acidity, and hydrogen-bonding basicity of the surface of silica under normal-phase conditions. In n-hexane-chloroform mixtures, the surface dipolarity-polarizability and hydrogen-bonding acidity of silica are not affected by the composition of the mixtures. The surface of silica has a high dipolarity-polarizability and a high hydrogen-bonding acidity. The hydrogen-bonding basicity of silica is much lower and decreases as the concentration of chloroform increases in the mobile phase.

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页码：127 / 139

页数：13

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