Viscometric study of complexes of poly(vinyl pyrrolidone) with Co2+

A polymer-metal complex is a metal complex containing a polymer ligand presenting a remarkably specific structure in which central metal ions are surrounded by an enormous polymer chain. Based on this polymeric ligand, the polymer-metal complex shows interesting and important characteristics, especially catalytic activities different from the corresponding ordinary metal complex of low molecular weight. In this work we have studied the synthesis in solution of different polyvinyl pyrrolidone/cobalt complexes (PVP/Co), using distillate water as solvent. The study has been focused on the interactions established between the polyvinyl pyrrolidone and the metallic cation Co2+ at 298 and 338 K with different cobalt concentration using four PVP molar mass samples. We have employed viscometry as the experimental technique. (C) 2002 Elsevier Science Ltd. All rights reserved.