Patent ID: 7927717

Claim:
An electroluminescent chemical complex represented by the general chemical formula: wherein: (A) the letters M, t and n represent one of the following combinations: (i) M is selected from the group consisting of ruthenium, rhodium, and iridium; t is 3; and n is 1 or 2; (ii) M is selected from the group consisting of palladium or platinum; t is 2; and n is 1; (iii) M is osmium; t is 3; and n is 1 or 2; and, (iv) M is osmium; t is 4; and n is 1, 2 or 3; (B) R 1 , R 2 , R 3 and R 4 can be the same or different and are independently selected from the group consisting of: substituted and unsubstituted hydrocarbyl groups; substituted and unsubstituted monocyclic and polycyclic heterocyclic groups; substituted and unsubstituted hydrocarbyloxy or carboxy groups; fluorocarbyl groups; halogen; nitrile; amino; alkylamino; dialkylamino; arylamino; diarylamino; and thiophenyl; and, (C) p, q, r and s are independently selected from the integers 0, 1, 2 or 3; subject to the proviso that, where any one of p, q, r and s is 2 or 3, only one of the R 1 , R 2 , R 3 and R 4 entities can be an entity other than saturated hydrocarbyl or halogen.