DIFFUSION OF SORBED PYRENE IN THE BONDED LAYER OF REVERSED-PHASE SILICAS - EFFECT OF ALKYL CHAIN-LENGTH AND PORE DIAMETER

被引：11

作者：

FADEEV, AY ^{[1
]}

LISICHKIN, GV ^{[1
]}

RUNOV, VK ^{[1
]}

STAROVEROV, SM ^{[1
]}

机构：

[1] LOMONOSOV STATE UNIV,DEPT CHEM,PRECONCENTRAT LAB,MOSCOW 119899,USSR

来源：

JOURNAL OF CHROMATOGRAPHY | 1991年 / 558卷 / 01期

关键词：

D O I：

10.1016/0021-9673(91)80109-T

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The processes of lateral diffusion of solutes in the bonded layer of n-alkylchlorosilane-modified silicas were studied using pyrene as a luminescence probe. It was shown that all bonded-chain carbon atoms interact with the solute for supports of pore diameter 40-50 nm. The reduction of the average pore diameter results in partial permeation of the solute into the bonded layer, which in turn leads to a decrease in apparent viscosity of the bonded layer. The presence of accessible silanol groups causes a strong decrease in pyrene mobility in the bonded layer.

引用

页码：31 / 42

页数：12

共 25 条

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