Patent ID: 8916677

Claim:
A method of forming a polymer comprising polymerizing a monomer of formula (III): wherein X is a polymerizable group Ar, Ar 1 and Ar 2 each independently represent an optionally substituted aryl or heteroaryl group; R 1 represents H or a substituent; and Z represents a direct bond or a divalent linking atom or group, wherein Ar 1 and Ar 2 are linked by a single bond or a divalent linking group selected from CR 1 R 2 , SiR 1 R 2 , PR 1 , NR 1 , O and S wherein R 1 and R 2 are independently selected from hydrogen; optionally substituted alkyl wherein one or more non-adjacent C atoms may be replaced with O, S, N, C═O and —COO—; alkoxy, aryl, arylalkyl, heteroaryl and heteroarylalkyl.