Universal Display Corporation
Organic Electroluminescent Materials and Devices

Abstract:

A compound of Formula I: ##STR00001## wherein each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is independently hydrogen or a substituent selected from the group consisting of deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, carbonyl, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, boryl, and combinations thereof; and wherein any two adjacent substituents are optionally joined or fused together to form a ring