Patent ID: 7161172

Claim:
An electroluminescent ligand compound having structure (II) below: and selected from compounds 2-a, 2-b, 2-d through 2-w, and 2-y through 2-aa, wherein: Com- pound A R 1 R 2 R 3 R 4 R 5 R 6 R 7 R 8 R 9 2-a C H H CF 3 H F H H H H 2-b C H H CF 3 H H CF 3 H H H 2-d C H H CF 3 H H F H H H 2-e C H H CF 3 H H H CH 3 O H H 2-f C Cl H CF 3 H H H H H H 2-g C H H H CH 3 H H F H H 2-h N — H H H H H F H H 2-i C H H CF 3 H H H CF 3 O H H 2-j N — CF 3 H H F H H H H 2-k C H H CF 3 H H H F H H 2-l C CF 3 H H H H H H H H 2-m C Cl H CF 3 H H H F H H 2-n C CF 3 H H H H H F H H 2-o C CF 3 H H H H H CH 3 O H H 2-p C Cl H CF 3 H H H CH 3 O H H 2-q N — CF 3 H H H H F H H 2-r C Cl H CF 3 H H H H H F 2-s C H H CF 3 H H H H H H 2-t C Cl H H H F H H H H 2-v C H H CF 3 H H CH 3 O H H H 2-w C H CH 3 O H H H H CF 3 H H 2-y C H H CF 3 H H F H F H 2-z C H H CF 3 H F H F H H 2-aa C H H Br H H H Br H H.