Patent ID: 7211334

Claim:
An electroluminescent device comprising: (i) a first electrode; (ii) a second electrode; and, (iii) a layer of an electroluminescent material positioned between said first and second electrodes, wherein said electroluminescent material comprises a compound having the following chemical formula: wherein, in Formula I, M is selected from the group consisting of lithium, sodium, potassium, rubidium, caesium, beryllium, magnesium, calcium, strontium, barium, copper, silver, gold, zinc, boron, aluminum, gallium, indium, germanium, tin, antimony, lead, manganese, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, cadmium and chromium; n is the valency of M; and R 1 , R 2 and R 3 can be the same or different, each being independently selected from the group consisting of hydrogen; substituted or unsubstituted aliphatic groups; substituted or unsubstituted aromatic, heterocyclic or polycyclic ring structures; fluorocarbons; halogens and nitrile groups.