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Adsorption Properties of Montmorillonite and Synthetic Saponite as Packing Materials in Liquid-Column Chromatography

Published online by Cambridge University Press:  02 April 2024

Yuji Nakamura ,
Akihiko Yamagishi ,
Toschitake Iwamoto  and
Makoto Koga
Yuji Nakamura
Affiliation:
Department of Chemistry, University of Tokyo, Komaba Meguro-ku, Tokyo 153, Japan
Akihiko Yamagishi
Affiliation:
Department of Chemistry, University of Tokyo, Komaba Meguro-ku, Tokyo 153, Japan
Toschitake Iwamoto
Affiliation:
Department of Chemistry, University of Tokyo, Komaba Meguro-ku, Tokyo 153, Japan
Makoto Koga
Affiliation:
The Research Institute of Kunimine Ind. Co., Kuroiso-shi 325, Japan
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Abstract

The adsorption of tris(1,10-phenanthroline)-ruthenium(II) (Ru(phen)32+) by two kinds of colloidally dispersed clays, sodium montmorillonite and synthetic saponite, was studied by spectrophotometric and electron-optical methods. Montmorillonite adsorbed this complex stronger than saponite. The electronic spectrum measurements suggested that the electronic states of the complex were more perturbed on adsorption by montmorillonite than by saponite. High-performance liquid chromatography was attempted on an ion-exchanged adduct of optically active Ru(phen)32+ and these clays. 1,1′-Binaphthol was eluted with a 1:1 (v/v) water-methanol mixture as an eluent. The compound was resolved with a separation factor of 15 and 1.4 on the saponite and montmorillonite columns, respectively. If tris(acetylacetonato)-chromium(III) was eluted with water, the compound was resolved with separation factors of 1.9 and 11 on the saponite and montmorillonite columns, respectively. These separation tendencies were probably due to the difference in the external surface area and the density of the bound chelates.

Keywords

AdsorptionElectronic absorptionLiquid-column chromatographyMontmorilloniteRuthenium phenanthrolineSaponite

Information

Type
Research Article
Information
Clays and Clay Minerals , Volume 36 , Issue 6 , December 1988 , pp. 530 - 536
Copyright
Copyright © 1988, The Clay Minerals Society

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