EP3436403A1 - Gezielte herstellung von 2,2,3,3-tetrasilyltetrasilan - Google Patents
Gezielte herstellung von 2,2,3,3-tetrasilyltetrasilanInfo
- Publication number
- EP3436403A1 EP3436403A1 EP17717637.7A EP17717637A EP3436403A1 EP 3436403 A1 EP3436403 A1 EP 3436403A1 EP 17717637 A EP17717637 A EP 17717637A EP 3436403 A1 EP3436403 A1 EP 3436403A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formula
- halides
- sih
- ppm
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/04—Hydrides of silicon
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/021—Preparation
- C01B33/027—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
Definitions
- Objects of the present invention are the octasilane 2,2,3,3-tetrasilyltetrasilane 1, compositions which, in addition to 2,2,3,3-tetrasilyltetrasilane 1, have one or more additional constituents which are not 1, processes for the preparation of 2,2,3,3-tetrasilyltetrasilane 1 and mixtures of higher hydridosilanes having 1.
- Another object of the present invention is the use of 1 and mixtures of higher hydridosilanes, which have 1, for the deposition of silicon-containing material.
- Silicon-containing material such as Silicon-containing layers or films on a support, find use as a semiconductor, insulator or sacrificial layer, for example in the manufacture of electronic circuits and in the production of photovoltaic cells for generating electric current from light.
- Metal silicides or from the decomposition of S1H4 or S12H6 were obtained under the action of energy and subsequent oligomerization.
- WO 2015/034855 A1 discloses the nonasilane 2,2,4,4-tetrasilylpentasilane 4 prepared by the thermal reaction of neopentasilane 3, also referred to as Si (SiH 3) 4 or 2,2-disilyltrisilane. Also disclosed is the use of 4 in the form of the tube product for the further production of silicon-based materials. However, pure 4 or the analytical data of pure 4 are not disclosed.
- desirable hydridosilanes have a boiling point of about 25 ° C. under reduced pressure, in order to allow decomposition-free purification of the hydridosilane, for example by distillative work-up.
- 2,2,3,3-Tetrasilyltetrasilane 1 should show these two properties in an almost ideal manner. It is an object of the present invention to produce octasilane 2,2,3,3-tetrasilyltetrasilane 1 selectively in pure form and in preparatively usable amounts.
- Another object of the invention is a composition
- a composition comprising 2,2,3,3-tetrasilyl tetrasilane of the formula 1 and one or more additional ingredients which are not 2,2,3,3-tetrasilyl tetrasilane 1.
- additional components are understood as meaning not only chemical compounds but also unspecified mixtures, such as, for example, decomposition products.
- By-products of the reaction are, for the purposes of the invention, e.g. understood the lithium halides formed.
- compositions according to the invention comprise tetrasilyltetrasilane of the formula 1 and hydridosilane of the formula 2, preferably in a ratio of the area% of the respective species of 2 to 1 to 20 to 1, preferably 3 to 1 to 10 to 1.
- Particularly preferred compositions have Tetrasilyltetrasilan of formula 1, and hydridosilane of the formula 2 and neopenta- silane of the formula 3, preferably in a ratio of the area% of the sum of
- the stated area% refer to the total area of one Gas chromatographic measurement performed as indicated below.
- step b) of the process according to the invention isotetrasilanyllithium prepared from neopentasilane 3 and methyllithium, as alkali metal silanide with dibromoethane, corresponding to route A, or SiCU, according to route B is converted to 1, further hydridosilanes, such as undecasilane 2 and with partial reformation of neopentasilane 3 according to the following reaction scheme (I):
- step b) of the process according to the invention the reaction in a temperature gradient with continuous homogenization of the reaction mixture, wherein a temperature range between -80 ° C to 50 ° C, in particular selected between 0 ° to 25 ° C,
- step b) of the process according to the invention it is also advantageous in step b) of the process according to the invention to carry out the reaction in a solvent or solvent mixture.
- suitable solvents or solvent mixtures include ethers, e.g. Diethyl ether. If the electrophile used is liquid within the temperature gradient, it may function as part of the solvent mixture or as the solvent.
- At least 0.03 equivalents of electrophile are added, based on the molar amount of hydridosilane used, which is converted to the metal silanide.
- 0.55 equivalents an equimolar amount or up to a ten-fold excess of electrophile based on the molar amount of hydridosilane used, which is converted to the metal silanide added.
- alkali metal silanides possible to set a molar ratio of 1:10 to 1: 100,000 based on the particular electrophile used.
- the electrophile serves as part of the solvent or is the solvent as previously described.
- the metal silanide is advantageously generated in situ from a hydridosilane and a metal organyl compound in a solvent or solvent mixture in advance, the reaction in a temperature range from - 30 ° C to + 30 0 C, advantageously at room temperature.
- equimolar amounts of organometallic compound are added, based on the molar amount of the hydridosilane used, which is reacted in situ to form the metal silanide, with the term equimolar amounts of organometallic compound also including molar amounts of 0.95 or 1, 05 equivalents are understood in the context of this invention.
- at least 0.01 to 0.05 equivalent of organometallic compound is added based on the molar amount of hydridosilane used, which is reacted in-situ to the metal silanide.
- Suitable organometallics are alkyl lithium compounds such as methyl lithium; suitable solvents or solvent mixtures include ethers, e.g. Diethyl ether.
- the reaction takes place with the greatest possible exclusion of moisture and oxygen. This is achieved by the use of dried solvents or dried solvent mixtures with a residual content of water of not more than 30 mass ppm and the use of an inert gas atmosphere.
- inert gases are understood as meaning gases or gas mixtures which do not react with the starting materials and / or the products in such a way that the yield of 1, of a reactive precursor of 1 or further higher hydridosilanes, is reduced.
- Suitable intergass or inert gas mixtures are largely free of oxygen and have dried nitrogen, argon or mixtures thereof.
- the workup of the reaction mixture in step c) of the process according to the invention is carried out using suitable physicochemical properties of the hydridosilanes formed.
- suitable physicochemical properties of the hydridosilanes formed include, for example, their good solubility in nonpolar solvents or nonpolar solvent mixtures and their partial pressures.
- Suitable nonpolar solvent mixtures include e.g. Pentane.
- Step b) is advantageously carried out in a temperature gradient with continuous homogenization of the reaction mixture, wherein a temperature range between -80 ° C to 50 ° C, in particular between 0 ° to 25 ° C is selected.
- Step b) is advantageously carried out using an equimolar amount up to a ten-fold excess of electrophile, alternatively using a molar ratio of alkali metal silanide to electrophile of 1:10 to 1: 100,000. If the selected electrophile is liquid within the temperature gradient, it may function as a solvent or part of the solvent mixture in the latter case.
- Step c) is carried out using suitable physico-chemical properties of the hydridosilanes 1 and 2 formed, such as their good solubility in non-polar solvents or nonpolar solvent mixtures or their Partiald back, with 1 and 2 are advantageously removed by extraction from the reaction mixture.
- Suitable nonpolar solvent mixtures include, for example, pentane.
- Step b) is advantageously carried out in a temperature gradient with continuous homogenization of the reaction mixture, wherein a temperature range between -80 ° C to 50 ° C, in particular between 0 ° to 25 ° C is selected.
- Step b) is advantageously carried out using an equimolar amount up to a ten-fold excess of electrophile, alternatively using a molar ratio of alkali metal silanide to electrophile of 1:10 to 1: 100,000. If the selected electrophile is liquid within the temperature gradient, it may function as a solvent or part of the solvent mixture in the latter case.
- Step c) is carried out using suitable physico-chemical properties of the silanes 1 and 2 formed, such as their good solubility in nonpolar solvents or nonpolar solvent mixtures or their vapor pressure, wherein 1 and 2 are advantageously removed by extraction from the reaction mixture.
- Suitable nonpolar solvent mixtures include, for example, pentane.
- NMR spectra were evaluated using the Mest-ReNova software from MestreLab Research, Chemistry Software Solutions. Product mixtures were tested by a combination of gas chromatography-mass spectrometry consisting of an HP 5890 Series II gas chromatograph coupled to an HP 5971 / A mass spectrometer, both manufactured by Agilent Technologies, Inc. Gas chromatographic separation was via an HP-1 Capillary column with a length of 25 m and a
- the quantification of the hydridosilanes was carried out by integration of the individual fractions, expressed in area% and based on the total area of the ion chromatogram, whereby the integration of the GC-MS signals was previously calibrated by comparison with the integrals of resonances in H NMR spectra of comparable Hydridosilangemische , such as S15H10, corresponding to cyclopentasilane and S16H12, corresponding to cyclohexasilane.
- GC / MS data were evaluated using the GC / MSD ChemStation software from Agilent Technologies, Inc.
- UV ultraviolet
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Silicon Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016205446.5A DE102016205446A1 (de) | 2016-04-01 | 2016-04-01 | Gezielte Herstellung von 2,2,3,3-Tetrasilyltetrasilan |
| PCT/EP2017/057251 WO2017167715A1 (de) | 2016-04-01 | 2017-03-28 | Gezielte herstellung von 2,2,3,3-tetrasilyltetrasilan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3436403A1 true EP3436403A1 (de) | 2019-02-06 |
Family
ID=58548661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17717637.7A Withdrawn EP3436403A1 (de) | 2016-04-01 | 2017-03-28 | Gezielte herstellung von 2,2,3,3-tetrasilyltetrasilan |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20190127229A1 (de) |
| EP (1) | EP3436403A1 (de) |
| JP (1) | JP2019509974A (de) |
| CN (1) | CN109153575A (de) |
| DE (1) | DE102016205446A1 (de) |
| TW (1) | TW201805238A (de) |
| WO (1) | WO2017167715A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020211833A1 (de) | 2020-09-22 | 2022-03-24 | Evonik Operations Gmbh | Verfahren zur Herstellung oligomerer Hydridosilane aus SiH4 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8535760B2 (en) * | 2009-09-11 | 2013-09-17 | Air Products And Chemicals, Inc. | Additives to silane for thin film silicon photovoltaic devices |
| DE102010028170B4 (de) * | 2010-04-26 | 2016-05-12 | Evonik Degussa Gmbh | Verfahren zur Herstellung metallierter Hydridosilanverbindungen |
| DE102011005387A1 (de) * | 2011-03-10 | 2012-09-13 | Wacker Chemie Ag | Verfahren zur Reduzierung des Aluminiumgehaltes von Neopentasilan |
| DE102013010101A1 (de) * | 2013-06-18 | 2014-12-18 | Evonik Industries Ag | Formulierungen umfassend Hydridosilane und Hydridosilan-Oligomere, Verfahren zu ihrer Herstellung und ihrer Verwendung |
| TWI634073B (zh) | 2013-09-05 | 2018-09-01 | 道康寧公司 | 2,2,4,4-四矽基五矽烷及其組成物、方法及用途 |
-
2016
- 2016-04-01 DE DE102016205446.5A patent/DE102016205446A1/de not_active Withdrawn
-
2017
- 2017-03-28 CN CN201780033923.9A patent/CN109153575A/zh active Pending
- 2017-03-28 US US16/089,921 patent/US20190127229A1/en not_active Abandoned
- 2017-03-28 EP EP17717637.7A patent/EP3436403A1/de not_active Withdrawn
- 2017-03-28 WO PCT/EP2017/057251 patent/WO2017167715A1/de not_active Ceased
- 2017-03-28 JP JP2018551449A patent/JP2019509974A/ja active Pending
- 2017-03-30 TW TW106110894A patent/TW201805238A/zh unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019509974A (ja) | 2019-04-11 |
| US20190127229A1 (en) | 2019-05-02 |
| WO2017167715A1 (de) | 2017-10-05 |
| CN109153575A (zh) | 2019-01-04 |
| DE102016205446A1 (de) | 2017-10-05 |
| TW201805238A (zh) | 2018-02-16 |
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