Fluorescent compounds and application thereof

A fluorescent compound exhibiting aggregation induced emission properties, the fluorescent compound having formula (I) or formula (II):

• wherein R1 is selected from the group consisting of:
• wherein R2 is selected from the group consisting of:
• wherein X is selected from the group consisting of —H, —F, and —Cl;
• and
• wherein R1 is a tertiary aromatic amine group for introducing high steric twisting between R1 and the benzothiazole core structure, while R2 is nitrile based or pyridine based linear group for introducing low steric twisting between R2 and the benzothiazole core structure, which contributes to a locked nonplanar conformation of the fluorescent compound in the aggregate state, by avoiding the strong intermolecular π-π interactions, and to make the fluorescent compound exhibit aggregation-induced emission (AIE) properties.