Highly oxygen permselective membrane prepared from cobalt‐complexed polyazomethine containing a ligand and a tri‐ or tetrasiloxane in the main chain

Two types of polyazomethines containing repetitive pairs of a tridentated ligand and an oligodimethylsiloxane in the backbone were synthesized and complexed with cobalt ion. The resulting polymer complex membranes showed very good oxygen permselectivity at 1 atm pressure difference, which is very close to the upper boundary line in an α vs. Po2 plot of data reported in the literature. The complexes are thought to function as oxygen carrier.