The thiadiazole represented by formula (
2
) or (
4
), when used as a light-emitting material in a light-emitting element, allows the light-emitting element to emit near-infrared light:
[In formulae (
2
) and (
4
), each R independently represents a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group. There may be a ring formed by a carbon linkage between two adjacent R's.]
当作为发光元件中的
发光材料使用时,由式(2)或(4)表示的
噻二唑允许发光元件发射近红外光:[在式(2)和(4)中,每个R分别表示氢原子、烷基或取代或未取代的芳基。两个相邻的R之间可能由碳键形成环。]