LINEAR SILVER CLUSTERS IN AQUEOUS-SOLUTION (CLUSTERITES) - RADIATION-INDUCED CHEMICAL SYNTHESIS AND PROPERTIES

The formation and properties of the products of tile radiation-induced chemical reduction of silver ions in aqueous solutions containing sod ium polyacrylate were investigated. The absorption spectra of these sp ecies exhibit a band at 290 nln and a band in tile visible region. The latter shifts front 470 nm to similar to 800 nm with time or after th e addition of silver ions. The species obtained (clusterites) are line ar silver clusters bound to tile carboxyl groups of tile ion exchanger . The red shirt of the visible band is due to the increase in their si ze. The mechanism of the formation and the structure of the clusterite s are discussed.