Patent ID: 6916902

Claim:
A composition comprising a polymer having a repeat unit of the formula: and additional optional repeat units of the formula wherein R 1 is independently, in each occurrence H, C 1-40 hydrocarbyl or C 3-40 hydrocarbyl containing one or more S, N, O, P or Si atoms, or both of R 1 together with the 9-carbon on the fluorene may form a C 5-20 ring structure containing one or more S, N, or O atoms; R 2 is independently in each occurrence C 1-20 hydrocarbyl, C 1-20 hydrocarbyloxy, thioether, C 1-20 hydrocarbyloxycarbonyl, C 1-20 hydrocarbylcarbonyloxy, or cyano; a is independently, in each occurrence 0 or 1; X is O, S, SO 2 , C(R 3 ) 2 or N—R 3 wherein R 3 is aryl of C 6 to C 40 or substituted aryl of C 6 to C 40 , aralkyl of C 6 to C 24 , or alkyl of C 1 to C 24 . Ar is an aryl or heteroaryl group of C 6 to C 40 or substituted aryl or heteroaryl group of C 6 to C 40 ; and Y and Z are independently in each occurrence selected from the group of conjugated unit of the formulas: wherein the conjugated units may bear substituents, such substituents being independently in each occurrence C 1-20 hydrocarbyl, C 1-20 hydrocarboxyloxy, C 1-20 thioether, C 1-20 hydrocarbyloxycarbonyl, C 1-20 hydrocarboxy carbonyloxy cyano, or fluoro group; X 1 is O or S; Q is R or Ar; R is C 1 to C 20 ; Ar is an aryl or heteroaryl group of C 6 to C 40 or substituted aryl or heteroaryl group of C 6 to C 40 ; R 4 is independently, in each occurrence H, C 1-40 hydrocarbyl or C 3-40 hydrocarbyl containing one or more S, N, O, P or Si atoms, or both of R 4 together with the 9-carbon on the fluorene may form a C 5-20 ring structure containing one or more S, N, or O atoms and R 5 is independently in each occurrence C 1-20 hydrocarbyl, C 1-20 hydrocarbyl, C 1-20 hydrocarbyloxy, thioether, C 1-20 hydrocarbyloxycarbonyl, C 1-20 hydrocarbylcarbonloxy, or cyano.