2550-06-3Relevant articles and documents
Dendritic polarizing agents for DNP SENS
Liao, Wei-Chih,Ong, Ta-Chung,Gajan, David,Bernada, Florian,Sauvée, Claire,Yulikov, Maxim,Pucino, Margherita,Schowner, Roman,Schwarzw?lder, Martin,Buchmeiser, Michael R.,Jeschke, Gunnar,Tordo, Paul,Ouari, Olivier,Lesage, Anne,Emsley, Lyndon,Copéret, Christophe
, p. 416 - 422 (2016)
Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy (DNP SENS) is an effective method to significantly improve solid-state NMR investigation of solid surfaces. The presence of unpaired electrons (polarizing agents) is crucial for DNP, but it has drawbacks such as leading to faster nuclear spin relaxation, or even reaction with the substrate under investigation. The latter can be a particular problem for heterogeneous catalysts. Here, we present a series of carbosilane-based dendritic polarizing agents, in which the bulky dendrimer can reduce the interaction between the solid surface and the free radical. We thereby preserve long nuclear T′2 of the surface species, and even successfully enhance a reactive heterogeneous metathesis catalyst.
METHOD FOR THE DEHYDROGENATION OF DICHLOROSILANE
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Paragraph 0094, (2021/06/22)
Dichlorosilane and trichlorosilane are dehydrogenated at elevated temperature in the presence of an ammonium or phosphonium salt as a catalyst, and a halogenated hydrocarbon or hydrogen halide. The method may be used to synthesize organochlorosilane.
Continuous production process and device for γ - chloropropyltrichlorosilane
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Paragraph 0060-0091, (2021/09/29)
The invention provides a continuous production process and device for γ -chloropropyltrichlorosilane, which comprises the following steps: respectively metering trichlorosilane and chloropropene into a reactor after being metered, and adding a catalyst. The first Crude products generated in the reactor are processed by a catalyst recovery device to obtain second crude products and a catalyst, the catalyst is returned to the reactor, second crude products are conveyed to first separation units. The second Crude product was separated by first separation units to give γ - chloropropyltrichlorosilane and propyltrichlorosilane. To the method and the device, trichlorosilane and chloropropene are continuously conveyed to the reactor for reaction, unreacted raw materials and the catalyst are returned to the reactor, and products and byproducts are separated and taken out. γ.
The ligand bidentate phosphine rhodium complex and its manufacturing method, and a hydrosilylation of allyl halide using a rhodium complex compound having a bidentate phosphine (by machine translation)
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Paragraph 0047-0048, (2020/09/16)
In the manufacture of a catalyst can be used as a complex 3 - [be] halo propyl silane and manufacturing method, a method for manufacturing 3 - halo propyl silane efficiently. [Solution] a rhodium complex catalyst or the like is used as a specific formula is obtained. [Drawing] no (by machine translation)
