Patent ID: 8470948

Claim:
A composition comprising a bulk polymer having the structure: wherein: M is selected from the group consisting of Si, Ge, or Sn; X selected from the group consisting of S and P; R 1 is, independently of an other R 1 in the polymer, a direct bond between M and the ethylene group depicted between M and X or a hydrocarbyl linking moiety having between 1 and about 9 carbon atoms; R 3 is an organic linking group selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, or aromatic; and n represents the number of repeat units in the polymer; wherein the polymer has the structure (IVb): wherein C 2 -C 5 is a hydrocarbyl having from two to five carbon atoms.