Patent ID: 7655322

Claim:
An organic light emitting device comprising: a) an anode; b) a cathode; and c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound having the structure III: wherein M is Pt or Pd; Z 2 is a linking group selected from bivalent alkyl groups and silanes, and the two phenyl groups are linked by one carbon atom or one silicon atom of the linking group; the phenyl groups may be optionally substituted with one or more substituents J; each substituent J is independently R′, O—R′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)NR′ 2 , CN, CF 3 , NO 2 , SO 2 , SOR′, SO 3 R′, or halo, and any two J groups on adjacent ring atoms can optionally form a 5- or 6-member cyclic group; and each R′ is independently H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl or heteroaryl.