Palladium/Norbornenes-Catalyzed C−H Bond Activation and Annulation to Construct Polycyclic Aromatic Hydrocarbons-based Fluorescent Materials

Abstract

Reported herein is the first example of NBE-CO2Me-mediated palladium-catalyzed C−H bond activation and annulation of bromo(hetero)aromatics to construct structurally diverse polycyclic aromatic hydrocarbons (PAHs)-based fluorescent materials. The approach shows a broad substrate scope and provides straightforward access to screening high-performance fluorescent materials. Novel organic single-molecule white-light material with anti-Kasha dual-emission character has been developed herein. Furthermore, the anti-Kasha dual-emission material was fabricated as water-dispersed nanoparticles (NPs) to target the mitochondria of living cells. The corresponding NPs could be further applied in two-channel emission intensity ratio imaging to observe the cellular local imaging information and the intercellular structure.