Composition of matter for use in organic light-emitting diodes

A compound of Formula (I):

• wherein
• A is selected from CN
• X1, X2, X3, and X4 are independently selected from H, CN, F, CF3, SO2Ph, SO2Me, and NO2 provided that when A is CN and X2 is F or CF3, then X3 is F, or that when both A and X2 are CN, then X3 is H, F, CF3, SO2Ph, SO2Me, or NO2;
• at least one instance of X1, X2, X3, and X4 is not H;
• R1, R2, R3, R4, and R5 are independently selected from H, deuterium, Ph, and D;
• provided that R2 and R4 are not D;
• D is independently selected from
• R11 to R18 and R31 to R38 each independently represent a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl, a substituted or unsubstituted alkenyl, a substituted or unsubstituted alkynyl, CN, a substituted or unsubstituted aryl, a substituted or unsubstituted heteroaryl, or a substituted or unsubstituted diarylamine;
• each of R11 and R12, R12 and R13, R13 and R14, R15 and R16, R16 and R17, R17 and R18, L11 and R11, L11 and R18 taken together can form a ring system;
• each of R31 and R32, R32 and R33, R33 and R34, R35 and R36, R36 and R37, R37 and R38, L13 and R31, L13 and R38 taken together can form a ring system;
• L11 and L13 each independently represents a single bond, a substituted or unsubstituted arylene, or a substituted or unsubstituted heteroarylene;
• X represents O, S, a substituted or unsubstituted nitrogen atom, a substituted or unsubstituted carbon atom, a substituted or unsubstituted silicon atom, a carbonyl, a divalent substituted or unsubstituted ethylene having a bonding chain length of 2 atoms, a substituted or unsubstituted vinylene;
• a substituted or unsubstituted o-arylene, or a substituted or unsubstituted o-heteroarylene;
• and
• Y represents C or N, and no more than one instance of Y is N;
• n is 1;
• provided that if an instance of Y is N, then the corresponding substituent selected from to R31 to R34 is absent,
• provided that at least one of the following conditions (a) to (c) is satisfied:
• (a) A is selected from A1 to A13, and X1, X2, X3, and X4 are independently selected from CN, F, CF3, SO2Ph, SO2Me, and NO2,
• (b) X1, X2, X3, and X4 are independently selected from H, F, CF3, SO2Ph, SO2Me, and NO2, and at least one instance of R1, R3, and R5 is D, and
• (c) D is independently D-II, and at least one instance of R1, R3, and R5 is D.