| 主权项 |
1. A monomer represented by Chemical Formula 1: wherein, in Chemical Formula 1, X is a substituted or unsubstituted aromatic ring group, A, B, and C are each independently a group represented by Chemical Formula 2, k, m, and n are independently 0 or 1, a sum of k, m, and n being 2 or 3, when k=m=1, A and B are different groups from each other, when k=n=1, A and C are different groups from each other, and when m=n=1, B and C are different groups from each other, and when k=m=n=1, at least two of A, B, and C are different groups from each other, wherein, in Chemical Formula 2, D and E are each independently a substituted or unsubstituted aromatic ring group, a substituted or unsubstituted heteroaromatic ring group, or a combination thereof, Z4 and Z5 are each independently a hydroxy group, a thionyl group, a thiol group, a cyano group, a substituted or unsubstituted amino group, a halogen atom, a halogen-containing group, or a combination thereof, w is 0 or 1, and * is a linking point. |
