Fused ring heterocyclic monomers, polymers thereof and their use in an organic light-emitting device

摘要

A monomer of formula (III):wherein X is a polymerisable group Ar, Ar1and Ar2each independently represent an optionally substituted aryl or heteroaryl group; R1represents H or a substituent; and Z represents a direct bond or a divalent linking atom or group. Ar1and/or Ar2may be fused to the adjacent Ar groups to form a fused ring system such as a fluorene unit. X may be selected from a boronic acid, boronic ester and halogen. Z is preferably an oxygen atom. The exemplified monomer of formula (III) is a dibenzomorpholine wherein Z is oxygen, each X is 4-bromophenyl & R1 is 4-n-butylphenyl. The monomer of formula (III) may be used to form a polymer in a polymerization process involving a metal catalyst. The polymer preferably contains fluorene repeat units. The polymer is useful in an organic electronic device such as an electroluminescent device (OLED).