Zhang, Guobing; Yu, Hao; Sun, Yue; Wang, Weiwei; Zhao, Yao; Wang, Lichun; Qiu, Longzhen; Ding, Yunsheng published their research in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2021. The article was titled 《Aza-substitution on naphthalene diimide-based conjugated polymers for n-type bottom gate/top contact polymer transistors under ambient conditions》.Reference of 2,5-Dibromopyridine The article contains the following contents:
Four conjugated polymers based on naphthalene diimide (NDI) as the acceptor and thiophene-phenyl-thiophene with different aza-substitutions as co-units were synthesized. The aza-substitution gradually lowered the HOMO (HOMO) and the LUMO (LUMO) energy levels. The polymer with four aza-substitutions exhibited the deepest LUMO/HOMO energy level (-4.10/-6.01 eV). Consequently, organic field-effect transistors (OFETs) based on the bottom-gate/top-contact configuration exhibited unipolar electron transport characteristics even if the devices were exposed directly to ambient conditions. Furthermore, the corresponding devices also maintained their n-type transport behavior during long-term storage in air (>300 days). This work demonstrated that the incorporation of nitrogen atoms into NDI-based conjugated polymers for further lowering the energy levels is a feasible strategy for the construction of air-stable n-type unencapsulated OFETs. After reading the article, we found that the author used 2,5-Dibromopyridine(cas: 624-28-2Reference of 2,5-Dibromopyridine)
2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Reference of 2,5-Dibromopyridine