ADSORPTION OF BETA-CYCLODEXTRIN AT THE POLYCRYSTALLINE GOLD ELECTRODE AQUEOUS-SOLUTION INTERFACE

被引：37

作者：

JARZABEK, G

机构：

[1] Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warszawa

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1990年 / 294卷 / 1-2期

关键词：

35;

D O I：

10.1016/0022-0728(90)87149-E

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The adsorption of β-cyclodextrin, β-CD, on a polycrystalline gold electrode has been studied in NaClO4, LiClO4 and Na2SO4 dilute solutions by impedance measurements. The adsorption of β-CD is similar to that for other organic compounds such as dimethylsulphoxide. β-CD is a strong adsorbate, half coverage (θ/2) being reached in solutions containing less than 5×10-5 mol dm-3. It was shown that the main symmetry axis of the adsorbed β-CD molecule is oriented perpendicular to the electrode surface. The adsorption of β-CD on the polycrystalline gold electrode follows a Langmuir isotherm with \ ̄gDGmaxo = -34.70 ± 0.57 kJ mol-. The observed behaviour has been compared with the literature data for β-CD adsorption on the Hg electrode. © 1990.

引用

页码：253 / 265

页数：13

共 36 条

[21] ADSORPTION OF ALPHA-CYCLODEXTRINS AND BETA-CYCLODEXTRINS ON DROPPING MERCURY-ELECTRODE IN AN AQUEOUS-SOLUTION [J].