Polysulfamide is a linear polymer with selective metal (palladium) adsorption capacity. The research group of Professor Yi Wenbin of Nanjing University of Science and Technology has developed a general method for preparing polysulfamide using secondary amines, and uses palladium to assist the synthesis of polysulfamide. A palladium-crosslinked polysulfamide skeleton metal catalyst was prepared by intramolecular collapse within the chain to form single-chain nanoparticles (SCNPs) [1] (Figure 1).

Figure 1 Synthesis of palladium cross-linked single-chain nanoparticles (PdII-SCNPs)

This catalyst can be very well used in many chemical transformations, such as SuZuki coupling, Heck coupling, nitro hydrogenation reduction and other reactions (Figure 2), and can be recycled after the reaction (Figure 3), fundamentally solving the problem This solves the previous problems of non-recyclable metal homogeneous catalysts, high cost and poor catalytic efficiency of recyclable heterogeneous catalysts.

Figure 2 Catalytic reactions of reusable homogeneous palladium-crosslinked single-chain nanoparticles (PdII-SCNPs) catalysts

Figure 3 Recycling process of palladium cross-linked single-chain nanoparticles (PdII-SCNPs)

Yi Wenbin is a professor and doctoral supervisor at Nanjing University of Science and Technology. He is mainly engaged in research on the principles, design and application of fluorine-containing functional chemicals. In the past five years, he has presided over more than 10 national-level projects, including the xx6 special project, the xx3 special project, and the National Natural Science Foundation of China (4 projects) in the field of national defense; as the first or corresponding author in J. Am. Chem. Soc., Angew. Published more than 30 articles in international and domestic magazines such as Chem. Int. Ed., Nat. Commun., CCS Chemistry, etc.; more than 20 authorized patents, 3 of which have been implemented into large-scale production, and 9 of which have been transformed; selected as "Stuck Neck" in Jiangsu Province Talent projects for technological research talents (result transformation), the second level of Jiangsu Province's "333", and young and middle-aged academic leaders in Jiangsu Province; won the second prize of the Jiangsu Province Science and Technology Progress Award as the first person, and the China Industry-Academic-Research Cooperation Innovation Achievement Award for Excellence Award, the first Science and Technology Innovation Development Award of Jiangsu Province.

J&K Scientific exclusively supplies recyclable homogeneous palladium single-chain nanoparticle catalysts developed by the research group of Professor Yi Wenbin of Nanjing University of Science and Technology. The product advantages are as follows:
Good catalytic efficiency: suitable for suzuki coupling reaction, heck coupling reaction, nitro reduction reaction, and the gas phase yield is above 85%;
The recovery process is simple: the reaction solution can be recovered and reused by simply precipitating and filtering in methanol;
The recycling efficiency is stable: it can be reused more than three times and still maintain a good nanoparticle size and a catalytic efficiency of more than 80%.

Recommended products

References

Xiang H, Wang J, Guo Z, et al. Functional polythioamides derived from thiocarbonyl fluoride[J]. 2023.