10025-78-2Relevant academic research and scientific papers
Analysis of the pyrolysis products of dimethyldichlorosilane in the chemical vapor deposition of silicon carbide in argon
Cagliostro,Riccitiello,Carswell
, p. 607 - 614 (1990)
A study of the products and reactions occurring during the chemical vapor deposition of silicon carbide from dimethyldichlorosilane in argon is presented. The silicon carbide solid that formed showed the presence of hydrogen and chlorine as impurities, wh
Amorphous silicon: New insights into an old material
Spomer, Natalie,Holl, Sven,Zherlitsyna, Larissa,Maysamy, Fariba,Frost, Andreas,Auner, Norbert
, p. 5600 - 5616 (2015)
Amorphous silicon is synthesized by treating the tetrahalosilanes SiX4 (X=Cl, F) with molten sodium in high boiling polar and non-polar solvents such as diglyme or nonane to give a brown or a black solid showing different reactivities towards suitable reagents. With regards to their technical relevance, their stability towards oxygen, air, moisture, chlorine-containing reaction partners RCl (R=H, Cl, Me) and alcohols is investigated. In particular, reactions with methanol are a versatile tool to deliver important products. Besides tetramethoxysilane formation, methanolysis of silicon releases hydrogen gas under ambient conditions and is thus suitable for a decentralized hydrogen production; competitive insertion into the MeO-H versus the Me-OH bond either yields H- and/or methyl-substituted methoxy functional silanes. Moreover, compounds, such as MenSi(OMe)4-n (n=0-3) are simply accessible in more than 75% yield from thermolysis of, for example, tetramethoxysilane over molten sodium. Based on our systematic investigations we identified reaction conditions to produce the methoxysilanes MenSi(OMe)4-n in excellent (n=0:100%) to acceptable yields (n=1:51%; n=2:27%); the yield of HSi(OMe)3 is about 85%. Thus, the methoxysilanes formed might possibly open the door for future routes to silicon-based products. Amorphous silicon is easily synthesized from tetrahalosilanes SiX4 (X=Cl, F) and molten sodium in different solvents. Reactivity studies prove the resulting materials as versatile tools for the formation of technical important silanes, such as the silicon chloro-, alkoxy-, and methylalkoxy-substituted derivatives (see figure; bl=black, br=brown).
Preparation of trichlorosilane from hydrogenation of silicon tetrachloride in thermal plasma
Wu, Qingyou,Chen, Hanbin,Li, Yuliang,Tao, Xumei,Huang, Zhijun,Shang, Shuyong,Yin, Yongxiang,Dai, Xiaoyan
, p. 251 - 254 (2010)
A new method of producing trichlorosilane by hydrogenation of silicon tetrachloride with assistance of DC charged thermo-plasma was proposed. We have studied the dependence of degree of disassociation and ionization of hydrogen on temperature, as well as
Yolk-Shell-Structured CuO?ZnO?In2O3 Trimetallic Oxide Mesocrystal Microspheres as an Efficient Catalyst for Trichlorosilane Production
Guo, Xiangfeng,Ji, Yongjun,Jia, Lihua,Li, Jing,Li, Qiongguang,Li, Xin,Liu, Hezhi,Su, Fabing,Zhang, Yu,Zhong, Ziyi
, (2020)
Trichlorosilane (TCS), the primary chemical feedstock for production of high-purity Si used in Si-based solar cells, is currently manufactured industrially via a non-catalytic hydrochlorination of metallurgical Si. This process generates a huge amount of undesirable silicon tetrachloride (STC) byproduct. Here we report the synthesis of yolk-shell-structured CuO?ZnO?In2O3 trimetallic oxide mesocrystal microspheres that can be employed as an efficient catalyst to produce TCS catalytically. The CuO?ZnO?In2O3 microspheres with multiple hetero-interfaces were prepared using a facile solvothermal reaction followed by calcination. We found that differing from a single CuO mesocrystal, the electronic density on Cu atoms in the CuO phase within CuO?ZnO and CuO?ZnO?In2O3 can be tuned by varying the composition. When used as a catalyst for Si hydrochlorination reaction to produce TCS, CuO?ZnO?In2O3 shows excellent catalytic performance with very high Si conversion and TCS selectivity. Under the same reaction conditions, the TCS yield increased 13 times relative to the catalyst-free process. This work demonstrates the possibility to decrease the amount of STC needed for the catalytic manufacture of TCS, and provides an approach to the facile synthesis of multi-component mesocrystal materials with a specific structure.
Hydrodechlorination of silicon tetrachloride to trichlorosilane over ordered mesoporous carbon catalysts: Effect of pretreatment of oxygen and hydrochloric acid
Kwak, Do-Hwan,Akhtar, M. Shaheer,Kim, Ji Man,Yang, O-Bong
, p. 1802 - 1805 (2016)
This paper reports on the catalytic reaction for the conversion of silicon tetrachloride (STC) to trichlorosilane (TCS) over pretreated ordered mesoporous carbon (OMC) catalysts by oxygen (denoted as OMC-O2) and hydrochloric acid (denoted as OM
REACTION OF 2,4,6-TRI-t-BUTYLPHENYLLITHIUM WITH BROMOTRICHLOROSILANE. GENERATION OF TRICHLOROSILYLLITHIUM, LiSiCl3
Oehme, H.,Weiss, H.
, p. C16 - C18 (1987)
Trichlorosilyllithium, LiSiCl3, is formed by reaction of bromotrichlorosilane with 2,4,6-tri-t-butylphenyllithium or mesityllithium.It is detected as trichlorosilane which is obtained by protonation and characterized by a 29Si NMR shift of 30.9 ppm.Its stability is evaluated.
Formation of 1,1-dichloro-2-vinyl-1-silacyclopropane by a photoinduced reaction between dichlorosilylene and 1,3-butadiene
Boganov, Sergey E.,Promyslov, Vladimir M.,Rynin, Stanislav S.,Krylova, Irina V.,Egorov, Mikhail P.
, p. 574 - 576 (2018)
A matrix FTIR study of interaction between SiCl2 and 1,3-butadiene revealed that at low temperatures, it stops at the step of complexation between the reactants. This allowed us to investigate a photochemical version of this interaction resulti
Compensation effect in trichlorosilane synthesis
Acker, J?rg,Bohmhammel, Klaus
, p. 151 - 157 (2003)
In a recent publication [J. Acker, K. Bohmhammel, J. Phys. Chem. B 106 (2002) 5105], the reactions between transition metal silicides and hydrogen chloride were studied by isothermal calorimetric measurements. The obtained apparent activation energies and pre-exponential factors show clearly a linear dependence that is attributed to the compensation effect. An isokinetic temperature of 696.9±22.1 K was determined. According to Larsson's model of selective energy transfer, a characteristic frequency of 969.3±46.5 cm-1 is calculated. The occurrence of the compensation effect is discussed in terms of chemisorption, precursor formation, and the involvement of surface species in essential reaction steps.
Preparation of trichlorosilane by plasma hydrogenation of silicon tetrachloride
Gusev,Kornev,Sukhanov
, p. 1023 - 1026 (2006)
We have studied silicon tetrachloride hydrogenation in an rf (40.68 MHz) plasma and have determined the trichlorosilane yield as a function of the molar energy input, H2: SiCl4 molar ratio, and pressure. The highest trichlorosilane y
The Amine Catalysed Cleavage of Oligochloropolysilanes with HCl
Raml, Walter,Hengge, Edwin
, p. 29 - 36 (1980)
Tetrakis(trichlorosilyl)silan (neo-Si3Cl12) is cleaved in an amine catalysed reaction by HCl in benzene solution to tris(trichlorosilyl)silan HSi(SiCl3)3 (1).The amine catalysed cleavage of 1 with different amines and solvents is investigated.A new method for preparation of pentachlorodisilane HSi2Cl5 is described and a reaction mechanism for the cleavage is postulated. - Keywords: Oligochlorosilanes; SiSi-Cleavage with HCl; neo-Dodecachloropentasilane; Tris(trichlorosilyl)silane
