Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. name: Pd2(DBA)3. Introducing a new discovery about 52409-22-0, Name is Pd2(DBA)3
Dithienosilole-benzothiadiazole based low bandgap copolymers remain promising material for organic photovoltaics. A new copolymer, poly[(4,4?-dioctyldithieno[3,2-b:2?,3?-d]silole-2,6-diyl) -alt-{4,7-bis[2-(3-hexyl)thienyl]-2,1,3-benzothiadiazole-5,5?-diyl}] (PDTSDTBT) was designed by introducing a thiophene spacer bearing a hexyl chain at beta-position in the main backbone and compared to its analog poly[(4,4?-dioctyldithieno[3,2-b:2?,3?-d]silole-2,6-diyl) -alt-(2,1,3-benzothiadiazole-4,7-diyl)] (PDTSBT). In PDTSDTBT, linear alkyl chains on silicon were chosen due to facile and cheap access and the inserted 3-hexylthiophene units were chosen to increase solubility and molar mass, a weak point with PDTSBT. The two parameters are important to optimize photovoltaic performances. To compare characteristics, PDTSDTBT of molar masses greater than, and equal to a sample of PDTSBT, were prepared. Pd-catalyzed Stille cross-coupling reactions in a micro-wave reactor to promote an efficient copolymerisations. A strong absorption ranging from 370 nm to 800 nm and a good thermal stability were observed. PDTSDTBT showed better solubility and higher degree of crystallinity. Facile synthesis of high molar masses meant that higher efficiencies, around 40% greater, could be obtained with PDTSDTBT. The polymer was demonstrated to be susceptible to improvement through the use of device-additives. For example, under initial optimisations using PDTSDTBT:PC60BM blend at a ratio of 1:1 delivered a power conversion efficiency of 2.13% with JSC = 7.73 (mA/cm2), under AM 1.5 (100 mW/cm2) illumination.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.name: Pd2(DBA)3, you can also check out more blogs about52409-22-0
Reference：
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method