Patent ID: 7626059

Claim:
A compound corresponding to the formula, wherein L is —O—, —S—, —N═N—, —C(O)—, —(SO 2 )—, or —OC(O)—; Y is independently in each occurrence hydrogen, halogen, an unsubstituted or inertly substituted hydrocarbyl group, Y′, or two adjacent Y groups together with the carbons to which they are attached form a fused aromatic ring, Y′ is a single covalent bond or a divalent derivative of an unsubstituted or inertly substituted hydrocarbyl group joining two or more divalent remnants of the foregoing structure, and in at least one occurrence, Y is —Y″(—C≡CR 1 ) m , and in at least one other occurrence, Y is —Y″—(C≡CR 2 ) n ; or in at least one occurrence, Y is —Y″(—C≡CR 1 ) m (C≡CR 2 ) n ; wherein, Y″ is a single covalent bond or a polyvalent derivative of an unsubstituted or inertly substituted hydrocarbyl group; R 1 is C 6-20 aryl; R 2 is hydrogen, C 1-6 alkyl, C 1-6 hydroxyalkyl, or trimethylsilyl; and m and n are integers from 1 to 5.