716-65-4Relevant academic research and scientific papers
Transition-metal-free mono- or dinitration of protected anilines
Dai, Enrui,Dong, Ying,Dong, Yongrui,Kong, Rui,Liang, Deqiang,Liu, Guangzhang,Ma, Yinhai,Wu, Qiong
, (2020/04/27)
An amide-assisted arene nitration is presented, and both mono- and dinitration of protected anilines could be effected by using NaNO2 and NaNO3 as the mono- and bisnitrating agents, respectively. This divergent synthesis is transition-metal- and acid-free, and features a broad substrate scope, low cost, and ortho–para selectivity.
Thiophene-fused benzothiadiazole: A strong electron-acceptor unit to build D-A copolymer for highly efficient polymer solar cells
Zhou, Pengcheng,Zhang, Zhi-Guo,Li, Yongfang,Chen, Xingguo,Qin, Jingui
, p. 3495 - 3501 (2014/06/24)
A novel strong electron-acceptor, thieno[2,3-f]-2,1,3-benzothiadiazole-6- carboxylate (BTT), was first designed and synthesized. By introducing two thienyl groups into BTT and then copolymerizing with thienyl group substituted benzo[1,2-b:4,5-b′]dithiophene (BDTT) unit, a low band gap D-A copolymer (PBTT-TBDTT) was obtained. Compared with its polymer analogue (PBT-TBDTT) with benzothiadiazole (BT) as an acceptor, PBTT-TBDTT exhibits stronger intramolecular charge transfer. Thus, it shows much broader absorption covering almost the whole visible light region (in the range of 300-850 nm) and narrower optical band gap around 1.45 eV with a large IP (ionization potential) at 5.35 eV. The maximum efficiency of PBTT-TBDTT based device reaches 6.07% which is much higher than that of PBT-TBDTT (3.24%), indicating that BTT unit is a promising electron-acceptor moiety to construct low band gap D-A copolymers for PSCs with high photovoltaic performances.
