Probing of chemically modified silica surfaces by solvatochromic pyridinium N-phenolate betaine indicators

被引：0

作者：

I. V. Khristenko

Yu. V. Kholin

N. O. Mchedlov-Petrossyan

C. Reichardt

V. N. Zaitsev

机构：

[1] Karazin Kharkiv National University,

[2] Philipps-Universität Fachbereich Chemie,undefined

[3] Taras Shevchenko Kiev National University,undefined

来源：

Colloid Journal | 2006年 / 68卷

关键词：

Silanol Group; Colloid Journal; Protonation Constant; Diglyme; Potassium Hydrogen Carbonate;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The state of betaine indicators, 2,6-diphenyl-4-(2,4,6-triphenylpyridinium-1-yl)phenolate and 2,6-dichloro-4-(2,4,6-triphenylpyridinium-1-yl)phenolate, on the surfaces of aminosilicas, silica modified with aminodiphosphonic acid, and unmodified silica gel is studied with diffuse reflectance spectroscopy. The normalized polarity parameters are calculated for the surface layers of the sorbents. It is revealed that regions with substantially different polarity and acidity are present on the surface of chemically modified silicas.

引用

页码：511 / 517

页数：6

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