ASSESSMENT OF SOLVENT PARAMETERS AND THEIR CORRELATION WITH PROTONATION CONSTANTS IN DIOXANE WATER MIXTURES USING FACTOR-ANALYSIS

被引：21

作者：

CASASSAS, E

FONRODONA, G

DEJUAN, A

TAULER, R

机构：

[1] Department of Analytical Chemistry, University of Barcelona, 08028 Barcelona

来源：

CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS | 1991年 / 12卷 / 01期

关键词：

D O I：

10.1016/0169-7439(91)80106-Z

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The effect of the composition of dioxane-water mixtures on wavelength shifts of different solvatochromic indicators and on pK(a) values of different carboxylic acids are studied using factor analysis. Target factor analysis is subsequently applied to find out which are the physicochemical parameters affecting the observed data variation. For wavelength shifts of the selected solvatochromic indicators three main sources of variation are found: solvent polarity, pi-*, the hydrogen-bond donor acidity of solvent, alpha, and the hydrogen-bond acceptor basicity of the solvent, beta. For pK(a) values of carboxylic acids the main source of variation is identified as being the polarity of the mixed solvent.

引用

页码：29 / 38

页数：10

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