Abstract: The invention provides photopolymerisable or photocrosslinkable reactive mesogen for forming a hole-transporting or light emitting polymer network, said mesogen having the structure (III) wherein M is a chromophoric aromatic or heterocyclic moiety; A1 and A2 are carbazole groups substituted in the 3-position of the carbazole ring, and may be the same or different; S1 and S2 are spacers, and may be the same or different; B1 and B2 are polymerisable groups, and may be the same or different; and m and n are independently integers from 1 to 10.

Abstract: The invention provides a photopolymerisable or photocrosslinkable reactive mesogen for forming a charge transporting or light emitting polymer network, the mesogen having an asymmetric structure (II): B1-S1-A1-M-(A-S-B)n (II) wherein: A and A1 are chromophores; S and S1 are spacers; B and B1 are endgroups which are susceptible to photopolymerisation or photocrosslinking; M is a non-chromophoric aliphatic, alicyclic or aromatic moiety; and n is an integer from 1 to 3; wherein, when the value of n is greater than 1, each of the groups A, S and B may be the same or different. Preferably, M is of the formula Y?Zm, wherein Y is an aliphatic, alicyclic, aromatic or heterocyclic moiety, Z is an aliphatic linking group and m is an integer from 2 to 4, and wherein each of the Z groups may be the same or different.

Abstract: The invention provides a photopolymerisable or photocrosslinkable reactive mesogen for forming a charge transporting or light emitting polymer network, the mesogen having an asymmetric structure (II): B1—S1-A1-M-(A-S—B)n (II) wherein: A and A1 are chromophores; S and S1 are spacers; B and B1 are endgroups which are susceptible to photopolymerisation or photocrosslinking; M is a non-chromophoric aliphatic, alicyclic or aromatic moiety; and n is an integer from 1 to 3; wherein, when the value of n is greater than 1, each of the groups A, S and B may be the same or different. Preferably, M is of the formula Y—Zm, wherein Y is an aliphatic, alicyclic, aromatic or heterocyclic moiety, Z is an aliphatic linking group and m is an integer from 2 to 4, and wherein each of the Z groups may be the same or different.