| 主权项 |
1. A compound comprising one or more moieties of formulae (I)-(V): wherein:
R1, R2, R3 and R4 are each independently selected from hydrogen, fluoro, chloro, bromo, substituted or unsubstituted (1-10C)alkyl, substituted or unsubstituted (2-10C)alkenyl, substituted or unsubstituted (2-10C)alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted amino, substituted or unsubstituted (1-10C)alkoxy, substituted or unsubstituted arylalkoxy, and hydroxyl;each πa independently represents a π-conjugated π-donor ring system formed from one, two, three or four 6-membered aryl or 5 to 6-membered heteroaryl rings;each πb independently represents a π-conjugated 6-membered aryl or 5-6 membered heteroaryl ring;each πc independently represents a π-conjugated 5-6 membered heteroaryl ring, which when taken in combination with πb, forms a π-acceptor ring system;
wherein:any or all of the rings forming πa, πb and πc may be independently optionally substituted with one more ring substituents selected from halo, (1-20C)alkyl, (2-20C)alkenyl, (2-20C)alkynyl, aryl, heteroaryl, cycloalkyl, heterocyclyl, carboxyl, phosphoryl, sulfonyl, hydroxyl, (1-20C)alkoxy, nitro, amino, mercapto, silyl, siloxy, azido, boronic acid group, sulfonic acid group, hydroxamic acid group, cyanoacrylate group, and dioxocyclobutenyl group having at least one functional group selected from the group consisting of a carboxyl, phosphoryl, sulfonyl, hydroxyl, alkoxy, nitro, amino, mercapto, silyl, siloxy, azido, boronic acid group, sulfonic acid group, hydroxamic acid group and cyanoacrylate group. |
