Synthesis of novel bis- and polyarylene ethynylenes by cross-coupling catalyzed by palladium complexes

Abstract

A novel carborane-containing compound with ethynyl groups, 1,2-bis[4-(4′-ethynylphenoxy)phenyl]-o-carborane, was synthesized. Cross-linking with 4-iodo- and 4,4′-diiododiphenyl ethers catalyzed by Pd complexes afforded the model bis-arylene ethynylenes and the corresponding polymers. The introduction of a carborane nucleus into the structure of the model compounds and polymers was shown to render these systems soluble.