DIRECT DIFFUSION MEASUREMENTS OF NAPHTHACENE ON CHEMICALLY DERIVATIZED SILICA-GELS

被引：6

作者：

BJARNESON, DW

PETERSEN, NO

机构：

[1] Department of Chemistry, The University of Western Ontario, London

来源：

LANGMUIR | 1991年 / 7卷 / 11期

关键词：

D O I：

10.1021/la00059a067

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fluorescence microscopy techniques are employed to investigate the mobility of polycyclic aromatic hydrocarbons on hydrocarbon-derivatized silica gels. The silica gel is derivatized using chemisorption (silylation) and physisorption techniques. The mobility of naphthacene on various surfaces is examined in detail. The diffusion coefficient and mobile fraction are greater for naphthacene on these supports as compared to the mobility of naphthacene on normal-phase silica gels. All results are rationalized in terms of the fractional coverage of the surface and the interactions between the derivatized surface and the fluorescent probe.

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页码：2821 / 2826

页数：6

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