New oligothienyl-phenanthroline ligands: precursors for polymers consisting of conjugated links entwined around transition metal

A new class of complexes of entwined ligands, CU(T-1)(2)(-) et CU(T-2)(2)(+), has been synthetized respectively from the 2,9-di-(2-thienyl)-1,10-phenanthroline (T-1) and the 2,9-di-(2-bithienyl)-1,10-phenanthroline (T-2) Their spectroscopic and electrochemical properties have been studied. Electropolymerization of these ligands and complexes on platinum electrode is depicted. Cu(T-1)(2)(+) leads to a monolayer which doesn't contain metallic center. On the other hand, the film obtained from CU(T-2)(2)(+) shows an electroactivity of both the metallic center and the polymer matrix.