Accession Number:

ADA285958

Title:

Development of a Colloidal Redox System Containing a Smectite Clay for Control of Reactivity and Reaction Selectivity

Descriptive Note:

Final rept. 1 Nov 1993-30 Sep 1994

Corporate Author:

DAVIDSON COLL NC DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1994-09-26

Pagination or Media Count:

4.0

Abstract:

This project is directed towards the development of colloidal redox systems involving smectite clays. Two polypyridylosmiumII complexes containing ligands bearing anionic pendant groups have been synthesized. Each complex has been successfully incorporated into stable montmorillonite colloids. Approximately 96 - 99 of the complex adsorbs onto the colloidal montmorillonite for loadings up to 1 mmoleg. These findings demonstrate the utility of adding a negatively charged side group to a complex to prevent simultaneous adsorption of the complex on two clay particles, which produces flocculation. Electrochemical studies of these colloidal redox systems indicate that at least part of the clay-adsorbed complex is accessible for electron transfer. These properties are prerequisites for the development of new catalytic systems based upon the incorporation of transition-metal catalysts into clay colloids. In order to develop such a system, two bipolar aquarutheniumII catalysts have been synthesized. These aquarutheniumII catalysts can also be incorporated into stable montmorillonite colloids. Characterization of clay colloids containing these catalysts is in progress.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Polymer Chemistry
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE