Design and Synthesis of Benzoheterodiazole‐based Fluorescent Compounds for Emitting Applications

Abstract

Benzoheterodiazole‐based fluorophores with aggregation‐induced emission (AIE) properties are synthesized and their photophysical properties in different states (solution, film, and powder) are investigated. These compounds present excellent thermal stability, and the decomposition temperature is above 300 °C. Among these compounds, the fluorophores with triphenylamine (TPA) group present better fluorescent emissions in solutions as well as in aggregated states, and the highest solution fluorescent efficiency is up to 75.2% in solution. Meanwhile, the fluorescent compounds terminated with triphenylethene (TPE) exhibit the classical AIE properties. Furthermore, these compounds might be used as emissive layers for the fabrication of red, orange and green organic light emitting diodes.

A triazolium-based fluorophore intercalated in layered double hydroxides: from simple syntheses to bright solid-state luminescence

“…This high thermal stability is comparable to what has been observed in the literature for benzodiazole-based phosphors. 38,39 Mass losses observed at around 100 °C and 200 °C are associated to water on the surface and interlayer water, respectively, as well as dehydroxylation of the LDH layers. 40 To further understand this phenomenon, UV-vis (diffuse reflectance) and IR spectra of the ZNAL-PPA-triaz1 powder were recorded after 1 h and 36 h of thermal treatment at 200 °C (Fig.…”

A Triazolium-Based Fluorophore Intercalated in Layered Double Hydroxides: from Simple Syntheses to Bright Solid-State Luminescence

“…This high thermal stability is comparable to what has been observed in the literature for Benzodiazole-based phosphors. 38,39 Mass losses observed at around 100°C and 200°C are associated to water on the surface and interlayer water respectively as well as dehydroxylation of the LDH layers. 40 Thus, the PLQY decrease cannot be associated to a degradation but rather a change in the environment of the intercalated molecule leading to lower optical properties.…”