Preparation of poly(9,10-dihydrophenanthrene-2,7-diyl) consisting of a chiral C2-symmetrical monomeric unit and optical properties of the polymer

Poly(9,10-dihydrophenanthrene-2,7-diyl) consisting of chiral 9,10-dihydro-9,10-bis(tributylsilyloxy)phenanthrene-2,7-diyl units has been prepared. Film of the polymer showed a very large circular dichroism with a peak value of -6deg/mu m at 411 nm.