Tetradentate metal complexes containing indoloacridine and its analogues

A complex of Formula II:

• wherein:
• M is Pt (II), Pd (II), or Au (III),
• each of V, V1, V2, and V3 is independently N, C, P, or Si,
• each of X and X1 is independently present or absent, and each X and X1 present independently represents CR7R8, C═O, SiR7R8, GeR7R8, NR7, PR7, PR7R8, R7P═O, AsR7, R7As═O, O, S, S═O, SO2, Se, Se═O, SeO2, BR7, BR7R8, AlR7, AlR7R8, R7Bi═O, BiR7, or a single bond,
• each of Y and Y1 is independently CR9, SiR9, GeR9, N, P, P═O, As, As═O, B, Bi═O, or Bi,
• L is a substituted or unsubstituted:
• 5-membered heteroaryl or 5-membered N-heterocyclic carbene,
• each of R1, R2, R3, R4, R5, and R6 is independently absent or present as a single substituent or multiple substituents, valency permitting, and each R1, R2, R3, R4, R5, and R6 present independently represents deuterium, halogen, hydroxyl, thiol, nitro, cyano, nitrile, isonitrile, sulfinyl, mercapto, sulfo, carboxyl, hydrazino;
• substituted or unsubstituted:
• aryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, alkyl, alkenyl, alkynyl, amino, monoalkylamino, dialkylamino, monoarylamino, diarylamino, alkoxy, aryloxy, haloalkyl, aralkyl, ester, alkoxycarbonyl, acylamino, alkoxycarbonylamino, aryloxycarbonylamino, sulfonylamino, sulfamoyl, carbamoyl, alkylthio, ureido, phosphoramide, silyl, polymeric;
• or any conjugate or combination thereof, and
• each of R7, R8, and R9 is independently hydrogen, deuterium, halogen, hydroxyl, thiol, nitro, cyano, nitrile, isonitrile, sulfinyl, mercapto, sulfo, carboxyl, hydrazino;
• substituted or unsubstituted:
• aryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, alkyl, alkenyl, alkynyl, amino, monoalkylamino, dialkylamino, monoarylamino, diarylamino, alkoxy, aryloxy, haloalkyl, aralkyl, ester, alkoxycarbonyl, acylamino, alkoxycarbonylamino, aryloxycarbonylamino, sulfonylamino, sulfamoyl, carbamoyl, alkylthio, ureido, phosphoramide, silyl, polymeric;
• or any conjugate or combination thereof.