Preparation of a new π-conjugated poly (p-phenylene) type polymer constituted of C_2 chiral repeating units and its solution and film properties

摘要

Chiral poly [9,10-dihydro-9,10-bis(tributylsilyloxy)phenanthrene-2,7-diyl] was prepared by dehalogenative polyconden-sation of the corresponding chiral dibromo monomer. Light scattering analysis revealed that the chiral polymer had a stronger intermolecular interaction than the corresponding racemic polymer. A cast film of the polymer showed a strong circular dichroism of about 6° μm~(-1), which corresponds to a θ value of 3.7 x 10~6° cm~2 dmol~(-1).