Organic electroluminescent materials and devices

A first device comprising a first organic light emitting device, the first organic light emitting device comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, comprising a compound having a structure according to Formula 1:
• wherein X1, X2, X3, X4, X5, and X6 are independently selected from the group consisting of C—R and N;
• wherein each R is independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
• and
• wherein at least one R comprises a donor group with at least two electron donating nitrogens.