Orientation of Linear π-Conjugated Poly(2,2′-bipyridine-5,5′-diyl), Poly(2,5-thienylene) and Poly(pyridine-2,5-diyl) on Substrates

Abstract

Abstract Linear π-conjugated poly(2,2′-bipyridine-5,5′-diyl) and poly(pyridine-2,5-diyl) form oriented thin layer film with their c-axes (the polymer chain axes) essentially perpendicular to the surface of carbon and gold substrates when deposited under vacuum, whereas they and poly(2,5-thienylene) are arranged along the direction of rubbing on the surface of rubbed polyimide substrate.