Safety of 4-Bromo-2-fluorobenzonitrileIn 2017 ,《Triplet decay-induced negative temperature dependence of the transient photoluminescence decay of thermally activated delayed fluorescence emitter》 was published in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices. The article was written by Wei, Xiaofang; Chen, Yongzhen; Duan, Ruihong; Liu, Jianjun; Wang, Ruifang; Liu, Yanwei; Li, Zhiyi; Yi, Yuanping; Yamada-Takamura, Yukiko; Wang, Pengfei; Wang, Ying. The article contains the following contents:
The photophys. properties of three TX-based D-A isomers (TXO-PhCz1, TXO-PhCz3, and TXO-PhCz4) with a PhCz donor at different substitution positions of Ph group on a TXO unit were studied. The substitution position of the PhCz unit significantly impacts the photophys. properties of these isomers. TXO-PhCz1 exhibits a very weak emission in both undoped and doped films, while TXO-PhCz3 and TXO-PhCz4 exhibit a strong emission with the requisite properties for TADF emitters, including a small ΔEST and transient PL decay curves with a prompt and delayed fluorescent component. TXO-PhCz4 exhibits a much stronger orbital coupling than TXO-PhCz3 and then the phosphorescent emission causes the inverse temperature dependence of the transient PL decay, which is contrary to that of TXO-PhCz3 and other TADF emitters. TXO-PhCz4 exhibits a small ΔEST of 23 meV and a short decay time of 14 μs at room temperature, which are much smaller and shorter than those of TXO-PhCz3. Multilayer OLEDs based on TXO-PhCz4 exhibit a very low-efficiency roll-off with a maximum current efficiency of 49.2 cd A-1, a maximum power efficiency of 47.7 lm W-1, and a maximum EQE of 16.3%. In the experiment, the researchers used 4-Bromo-2-fluorobenzonitrile(cas: 105942-08-3Safety of 4-Bromo-2-fluorobenzonitrile)
4-Bromo-2-fluorobenzonitrile(cas:105942-08-3) is used as a OLED intermediate, Pharmaceutical, electronic and chemical intermediate.Safety of 4-Bromo-2-fluorobenzonitrile It is used in the synthesis of heterocycles and liquid crystals.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts