Light-emitting material, compound, long-persistent phosphor and light-emitting element

A compound represented by the following general formula (1):

• wherein R1 to R5 each independently represent a hydrogen atom or a substituent;
• one of R1 and R3 is a cyano group,
• one to three of R1 to R5 each are an aryl group Ar optionally substituted with an alkyl group or an aryl group in which the aryl group Ar has a benzene ring that may be condensed with a ring that may optionally contain an oxygen atom or a sulfur atom in addition to carbon atoms as a ring skeleton-constituting atom, but is not condensed with a ring containing any other hetero atom than an oxygen atom and a sulfur atom as a ring skeleton-constituting atom, the total carbon number of the Ar is 6 to 30, and when two or more of R1 to R5 are Ar's, these Ar's may be the same as or different from each other,
• one to three of R1 to R5 each are a donor group D but excepting one that corresponds to Ar, and when two or more of R1 to R5 are D's, these D's may be the same as or different from each other.