Composition of matter for use in organic light-emitting diodes

A compound of Formula (I):

• wherein
• R1, R2, R3, R4 and R5 are independently selected from hydrogen, deuterium, Ar1, and D1;
• at least one of R1, R2, R3, R4 and R5 is D1;
• A1 is independently selected from
• XA is independently selected from O, S, and NRA′;
• RA is independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy, substituted or unsubstituted aryl, substituted or unsubstituted aryloxy, substituted or unsubstituted heteroaryl, substituted or unsubstituted heteroaryloxy, and silyl;
• two or more instances of RA taken together can form a ring system;
• RA′ is independently selected from hydrogen, deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl;
• two or more instances of RA′ and RA taken together can form a ring system;
• RA′ is fluoroalkyl;
• LA is independently selected from substituted or unsubstituted arylene, and substituted or unsubstituted heteroarylene;
• wherein each instance of arylene and heteroarylene can be substituted with one or more substituents independently selected from deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl;
• two or more of these substituents taken together can form a ring system;
• D1 is independently selected from
• XD is independently selected from O, S, NRD′, C(O), substituted or unsubstituted methylene, substituted or unsubstituted ethylene, substituted or unsubstituted vinylene, substituted or unsubstituted o-arylene, and substituted or unsubstituted o-heteroarylene;
• wherein each instance of methylene, ethylene, vinylene, o-arylene or o-heteroarylene can be substituted with one or more substituents independently selected from deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl;
• RD is independently selected from hydrogen, deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy, substituted or unsubstituted amino, substituted or unsubstituted aryl, substituted or unsubstituted aryloxy, substituted or unsubstituted heteroaryl, substituted or unsubstituted heteroaryloxy, and silyl;
• two or more instances of RD taken together can form a ring system;
• RD′ is independently selected from hydrogen, deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl;
• two or more instances of RD′ and RD taken together can form a ring system;
• LD is independently selected from single bond, substituted or unsubstituted arylene, and substituted or unsubstituted heteroarylene;
• wherein each instance of arylene and heteroarylene can be substituted with one or more substituents independently selected from deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl;
• two or more of these substituents taken together can form a ring system;
• Ar1 is independently selected from substituted or unsubstituted aryl and substituted or unsubstituted heteroaryl without containing any nitrogen atoms;
• and wherein each instance of aryl, and heteroaryl can be substituted with one or more substituents independently selected from deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl without containing any nitrogen atoms;
• two or more of these substituents taken together can form a ring system;
• and
• each “*” represents a point of attachment to a carbon of Formula (I).