Lu, Mengxia published the artcileSynthesis of D-A low-bandgap polymer-based thieno[3,4-b]pyrazine and benzo[1,2-b:4,5-b’]dithiophene for polymer solar cells, Related Products of bromides-buliding-blocks, the publication is Polymer Bulletin (Heidelberg, Germany) (2017), 74(2), 603-614, database is CAplus.
Three D-A low-bandgap polymer-based benzo[1,2-b:4,5-b’]dithiophene (BDT) and thieno[3,4-b]pyrazine (TP) unit with different substituents were synthesized using Stille coupling. The substituent effects were explored. It is found that attaching the Ph group at the 2,3-positions of thienopyrazine unit is beneficial to good coplanarity and regularity of mol. packing. Meanwhile, attaching the longer alkoxyl side chain at BDT unit or Ph group at the 2,3-positions of thienopyrazine unit had the relatively deep HOMO (LUMO) energy levels. The three D-A polymers showed good thermal stability and exhibited broad absorption, low bandgap, and order packing structure. As a result, the highest PCE of 1.50 % was achieved for the polymer P2 with the substituents, including hexyldecyloxyl at the BDT unit and Ph at the TP unit.
Polymer Bulletin (Heidelberg, Germany) published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Related Products of bromides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary