Synthesis and Photophysical Properties of Multi-Functional Bisimidazolyl Phenol Zinc (II) Complex: Application in OLED, Anti-Counterfeiting and Latent Finger Print Detection

摘要

+An aggregation-induced emission-based, luminescent Zinc (II) coordination complex of bisimidazolyl phenol (Zn-BDI) is prepared. The thermal stability of the complex Zn-BDI is attributed to the twisted conformation, and the rigid molecular structure of the ligand BDI resulted from the incorporation of the Zn-metal atom. The maximum emission of the Zn-BDI appears to be at 475 nm and emits strong cyan fluorescence. The light emission performance of the prepared zinc complex in organic light-emitting diodes (OLEDs) indicates fairly good electroluminescence properties (max. brightness 13500 cd/m(2), max. EQE=3.8 %). Moreover, these Zn-BDI can emit strong cyan-blue luminescence with a high quantum efficiency (0.83), and hence, latent fingerprint (LFPs) investigation exhibited permanent, immutable, and unique pores that are distributed on the ridges. Collectively, the prepared Zn complex offers a new avenue for the OLED and LFP applications.