Jiang, Yunsheng et al. published their research in Chemistry of Materials in 2022 | CAS: 128-08-5

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Synthetic Route of C4H4BrNO2

Alkyloxime-Substituted Thiophene-Based Wide-Band-Gap Polymer Donor Achieving a High Short Circuit Current Density of 30 mA cm-2 in Organic Solar Cells was written by Jiang, Yunsheng;Liu, Haitao;Li, Xu;Yuan, Yi;Wang, Jinliang;Cui, Bo;Li, Yuning. And the article was included in Chemistry of Materials in 2022.Synthetic Route of C4H4BrNO2 This article mentions the following:

A new polymer TTOTCl with a repeat unit consisting of a chlorinated thienyl-substituted benzo[1,2-b:4,5-b′]dithiophene (BDTCl) donor unit, a thiophene spacer, and an alkyloxime-substituted thiophene (TO) acceptor unit is reported as a wide-band-gap donor for nonfullerene acceptor-based organic solar cells (OSCs). The optical band gap (Egopt = 1.97 eV), the HOMO (HOMO) energy level (EHOMO = -5.48 eV), and the LUMO (LUMO) energy level (ELUMO = -3.51 eV) of TTOTCl match well with the nonfullerene acceptor Y6 (Egopt = 1.33 eV; EHOMO = -5.65 eV; ELUMO = -4.10 eV). TTOTCl also showed a high space charge-limited current (SCLC) hole mobility of 1.36 x 10-3 cm2 V-1 s-1. OSCs using TTOTCl as the donor and Y6 as the acceptor achieved a high power conversion efficiency (PCE) of up to 14.42% with a record high Jsc of 30.00 mA cm-2 along with a Voc of 0.70 V and a fill factor (FF) of 0.68. The PCE was further improved to 15.43% using a hole transport enhancement layer, with an enhanced Voc and FF of 0.72 V and 0.71, resp. The unencapsulated OSC device showed excellent long-term stability in ambient air with a 90.4% retention in the PCE over 30 days. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Synthetic Route of C4H4BrNO2).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Synthetic Route of C4H4BrNO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary