Preparation and Photoluminescent Properties of Three 5‐Amino Benzothiadiazoles (5‐amBTDs)

Abstract

Three DÀ A compounds were designed and synthesized based on a benzothiadiazole acceptor. Azepane (AP), iminodubenzyl (IDB) and iminostilbene (ISB) were used, respectively, as donors and installed on the 5-position of BTD to afford 1, 2 and 3, respectively. Their photophysical properties in different states (solution, film, crystal, and powder) are systematically investigated. Among them, AIEactive compounds 2 and 3 were found to have good sensitivity toward viscosity and display quite good linear relationship with an increase in viscosity. Compound 2 displayed dual emission in solutions which largely depended on the polarity of the solvent. Meanwhile, compound 2 exhibits a mechanochromic character with disappearance and reappearance of a dual-emissive peak induced by mechanical grinding and solvent fuming. Furthermore, these three compounds can be used in the fabrication of blue OLED devices.

4,7-Diarylbenzo[c][1,2,5]thiadiazoles as fluorophores and visible light organophotocatalysts

“…5,7 The focus of research into BTZ fluorescence includes methods to tune the wavelengths of emission ( particularly towards lower energy red light) and spans applications such as sensors, 37 bioimaging agents, 38 thermally activated delayed fluorophores, 39 and organic LED devices. 40 With this in mind, we sought to examine the fluorescence properties of our library of BTZ molecules in parallel with assessing their photocatalytic performance.…”