| abstract |
A compound comprising a ligand L A of Formula I, n n n n n n n n n n is disclosed. In Formula I, each of Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , and Z 6 is C or N; K is selected from a direct bond, O, and S; if K is O or S, then Z 6 is C; ligand L A is coordinated to a metal by the dash lines; M is coordinated to at least one other ligand; L 1 is an organic linker; if M is selected from Ru, Os, or Ir, then K is O or S; if M is selected from Pt, Pd, Cu, Ag, or Au, and K is a direct bond, then M forms at least one bond to oxygen or sulfur; when M is selected from Pt, Pd, Cu, Ag, or Au, and K is O or S, then L 1 is selected from —CR═N—, —CR′R″CR′R″—, —NR′BR′—, —CR′R″O—, —CR′R″S—, —CR′═CR″O—, —CR′═CR″S—, —CR′═CR′NR—, —CR′═CR″CR 2 —, —C(═N—)—, and —C(═CR—)—. |