Effect of polyelectrolytes on the rate of ligand–metal-ion reactions. Part 2.—Retardation by polyphosphates of the complexation of cobalt(II) with an azo-dye
- 1 January 1982
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 78 (6) , 1809-1816
- https://doi.org/10.1039/f19827801809
Abstract
The effect of long-chain polyphosphates on the rate of complexation of cobalt(II) with pyridine-2-azo-p-dimethylaniline (PADA) is studied using the temperature-jump method. PADA is shown to be a very sensitive probe allowing the study of the specific interactions between Co2+ ions and polyphosphates. The retardation effect observed is attributed to the ‘site-binding’ of Co2+ ions accompanied by complete dehydration. The results confirm, through a totally different approach, previous conclusions from n.m.r. measurements.Keywords
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