Name: Tris(dibenzylideneacetone)dipalladium(0)In 2022 ,《Isomeric Acceptor-Acceptor Polymers: Enabling Electron Transport with Strikingly Different Semiconducting Properties in n-Channel Organic Thin-Film Transistors》 appeared in Chemistry of Materials. The author of the article were Shi, Yongqiang; Li, Wenhao; Wang, Xin; Tu, Lijun; Li, Mingwei; Zhao, Yan; Wang, Yang; Liu, Yunqi. The article conveys some information:
The “”acceptor-acceptor”” (A-A) backbone strategy is considered one of the most promising mol. design strategies to achieve high-performance n-type semiconducting polymers. However, developing high-mobility A-A type polymers is highly challenging because of the steric hindrance inherited in typical acceptor building blocks. On the other hand, the acceptor units with isomeric chem. structures, which can induce interesting optoelectronic properties, are rarely studied in n-type semiconducting polymers because of the great challenge in the synthesis of isomers. To deeply understand the effects of isomeric electron-accepting structures on the physicochem. properties and device performances of n-type semiconducting polymers, herein, we design and synthesize two isomeric bithiazole dicarboxylate ester derivatives, namely, 2-BTzE (2,2′-bithiazole) and 5-BTzE (5,5′-bithiazole), leading to two isomeric polymers P(BTI-2-BTzE) and P(BTI-5-BTzE), resp. These two polymers have the same backbone and side chains but different linking positions of bithiazole. This subtle change leads to a striking difference in their polymerization reaction activity, mol. geometry, and solid-state packing. Thus, P(BTI-2-BTzE) demonstrates higher Mn, more planar backbone, and more ordered solid-state packing than those of P(BTI-5-BTzE). Thanks to the favorable optoelectronic properties and the backbone geometry, P(BTI-2-BTzE)-based organic thin-film transistors (OTFTs) yield a significantly higher electron mobility (μe) of 0.1 cm2 V-1 s-1, which is >200 times higher than that of P(BTI-5-BTzE) (μe = 4.1 x 10-4 cm2 V-1 s-1). Overall, this study demonstrates that the isomerization of acceptors is an effective strategy to solve the “”steric hindrance”” issue of A-A type polymers, eventually maximizing the device performance of n-channel OTFTs. The results came from multiple reactions, including the reaction of Tris(dibenzylideneacetone)dipalladium(0)(cas: 51364-51-3Name: Tris(dibenzylideneacetone)dipalladium(0))
Tris(dibenzylideneacetone)dipalladium(0)(cas: 51364-51-3) is used in the preparation of semiconducting polymers processed from nonchlorinated solvents into high performance thin film transistors.Name: Tris(dibenzylideneacetone)dipalladium(0)It is used as catalyst for the synthesis of epoxides, alpha-arylation of ketones, in combination with BINAP for the asymmetric heck arylation of olefins, site-selective benzylic sp3 palladium-catalyzed direct arylation and homoallylic diamination of terminal olefins.
Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI