Patent ID: 11937494
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A compound of Formula I, , wherein:
rings A and B are each independently a 5-membered or 6-membered heterocyclic ring;
rings C and D are each independently a 5-membered or 6-membered carbocyclic or heterocyclic ring;
L is N or CR;
X is O, S, NR, BR, BRR′, CRR′, or SiRR′;
RA, RB, RC, and RD each independently represents zero, mono, or up to a maximum allowed substitutions to its associated ring;
R, R′, RA, RB, RC, and RD are each independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
two substituents can be joined or fused to form a ring;
when rings C and D are both benzene, rings A and B are both a 5-membered heterocyclic ring or both a 6-membered heterocyclic ring;
when rings A and B are 5-membered heterocyclic rings, at least one of the following is true:
1) X is BR, BR′R″, NR, CRR′, or SiRR′; or
2) L is N;

when L is N, rings A and B both are 6-membered heterocyclic rings, and rings C and D are both benzene, then X is NR, BR, BRR′, CRR′, or SiRR′.