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EP2588411A1 - Polysilanes à longueur de chaîne moyenne et procédé pour leur préparation - Google Patents

Polysilanes à longueur de chaîne moyenne et procédé pour leur préparation

Info

Publication number
EP2588411A1
EP2588411A1 EP11730630.8A EP11730630A EP2588411A1 EP 2588411 A1 EP2588411 A1 EP 2588411A1 EP 11730630 A EP11730630 A EP 11730630A EP 2588411 A1 EP2588411 A1 EP 2588411A1
Authority
EP
European Patent Office
Prior art keywords
polysilanes
ppm
chain length
medium chain
length according
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Withdrawn
Application number
EP11730630.8A
Other languages
German (de)
English (en)
Inventor
Norbert Auner
Christian Bauch
Rumen Deltschew
Sven Holl
Javad MOHSSENI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spawnt Private SARL
Original Assignee
Spawnt Private SARL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Spawnt Private SARL filed Critical Spawnt Private SARL
Publication of EP2588411A1 publication Critical patent/EP2588411A1/fr
Withdrawn legal-status Critical Current

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
    • C01B33/08—Compounds containing halogen
    • C01B33/107—Halogenated silanes
    • 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
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/60—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which all the silicon atoms are connected by linkages other than oxygen atoms

Definitions

  • the present invention relates to polysilanes of medium chain length as pure compound or mixture of
  • composition the atomic ratio substituent: silicon is at least 1: 1, and method for their preparation.
  • polysilanes are prepared by numerous methods, such as by heating gaseous chlorosilanes with or without reducing agent to relatively high temperatures (above 700 ° C).
  • PCS chlorinated polysilanes
  • the resulting chlorinated polysilanes (PCS) have only a high proportion of short-chain, branched and / or cyclic molecules and are also contaminated with solvent / catalyst or substances from the reactor walls.
  • PCS chlorinated polysilanes
  • the present invention is based on the object
  • Polysilanes medium chain length as a pure compound or Mixture of compounds each having at least one direct bond Si-Si whose substituents consist exclusively of halogen and / or hydrogen and in whose composition the atomic ratio substituent: silicon is at least 1: 1, and a process for their
  • polysilanes according to the invention of medium chain length are characterized in their chemical properties by the presence of direct bonds Si-Si, whereby these substances have a strong affinity for oxygen and chlorine and are suitable for binding these elements.
  • these substances e.g. chlorinated oligosilanes too
  • the vapor pressure is preferably above 1 hPa and below 1000 hPa at 200 ° C. Particularly noteworthy here is the property of all According to the invention polysilanes that from these due to their molecular composition by suitable processes, such as annealing at high temperatures, pure silicon can be obtained.
  • All polysilanes according to the invention also have in common that they disproportionate in the thermal treatment, that is, disintegrate into longer and shorter-chain products.
  • the brominated or hydrogenated polysilane is colorless to light yellow.
  • the chlorinated polysilane is colorless to greenish yellow, intense orange or reddish brown.
  • the polysilanes of medium chain length are liquid or viscous to solid depending on their molecular structure.
  • polysilanes which are solids in pure form may also be completely or partially dissolved in liquid polysilanes.
  • the polysilanes expediently have a metal content of less than 1%.
  • polysilanes which are less than 2 atomic%.
  • polysilanes are used which predominantly linear long chains and almost no short chain
  • branch points of the short-chain Proportion based on the entire product, preferably less than 2%.
  • the substituents of the polysilanes preferably consist exclusively of halogen or of halogen and hydrogen.
  • the polysilanes of medium chain length can continue
  • Polysilanes whose substituents are bromine have a) in 29 Si NMR spectra their significant product signals in the chemical shift range from -10 ppm to -42 ppm, from -46 ppm to -55 ppm and / or -63 ppm to -96 ppm , b) typical RAMAN intensities not outside the ranges 10 cm “1 to 150 cm “ 1 , 155 cm “1 to 350 cm “ 1 , at 390 cm “1 to 600 cm “ 1 and at 930 cm “1 to 1,000 cm “ 1 .
  • Laser excitation T-sapphire laser, pumped by Ar ion laser
  • confocal Raman and Lumineszenzmikroskop with liquid nitrogen cooled CCD detector, measuring temperature equal to room temperature, excitation wavelengths in the visible spectral range, u. a. 514.53 nm and 750 nm, measured.
  • Bruker OPX 250 with pulse sequence zg30 recorded and against tetramethylsilane (TMS) as external standard [ ⁇ ( 29 Si) 0.0] referenced.
  • Polysilanes of medium chain length Si n 2n + 2 and Si n 2n with n greater than 3 and less than 50, preferably greater than 3 and less than 9, more preferably greater than 3 and less than 7, and X F, Cl, Br, I and / or H is thereby characterized in that it contains one or more of the synthesis steps described below.
  • the individual variants are below
  • the polysilanes are through
  • the polysilanes are obtained by plasma-assisted synthesis of halosilanes, where halogen is bromine.
  • the polysilanes are obtained by plasma-assisted synthesis of H-silanes and / or H-oligosilanes.
  • the polysilanes are obtained by plasma-assisted synthesis of halogenated oligosilanes, with particular preference being given to using halogenated di- and trisilanes.
  • the polysilanes are prepared by plasma-assisted synthesis of mixtures which also contain organically substituted silanes and / or oligosilanes.
  • methylchlorosilanes are used for this purpose.
  • the polysilanes are through
  • Hydrohalogenation may be assisted by catalysts such as ammonium salts.
  • the polysilanes by catalytic coupling of disilanes and / or trisilanes with Organylphosphonium- and / or -ammoniumsalzen as
  • the polysilanes are through
  • Wurtzkupplung of lower halosilanes such as disilanes and / or trisilanes
  • alkali metals and / or magnesium Especially preferred are activated metals, e.g. Rieke magnesium.
  • the polysilanes are through
  • the polysilanes are through
  • the polysilanes are through
  • Hydrogenation of polysilanes medium chain length obtained preference is given to using halogenated polysilanes.
  • metal or metalloid hydrides are preferably used.
  • the reactor parts in which the above reactions take place are at a temperature of -70 ° C to 500 ° C,
  • the polysilanes are obtained by pyrolysis of polysilane by a
  • Disproportionation and isolation of the polysilanes of the invention takes place from the vapor phase.
  • the polysilanes are obtained by thermolytic chain extension on contact materials. It is after disproportionation of
  • Starting material preferably the longer-chain fraction isolated from the product mixture.
  • the polysilanes are obtained by thermal reaction of silicon with S1X. 4
  • FIG. 1 shows a Si-NMR spectrum of a
  • thermolysis A mixture of 300 sccm of H2 and 600 sccm of SiCl 4 (1: 2) is introduced into a quartz glass reactor, the process pressure being kept constant in the range from 1.5 to 1.6 hPa. The gas mixture is then by a high-frequency discharge in the
  • the polychlorosilane mixture converted to a solid, highly crosslinked chlorinated polysilane (chloride-containing silicon) of the empirical formula SiClo, os to SiClo, o7 and short-chain chlorosilanes. After completion of the reaction, the container was allowed to cool and the solid product was taken out. Yields based on the
  • a mixture of 200 sccm of H2 and 600 sccm of SiCl 4 vapor (1: 3) is introduced into a quartz glass reactor, the process pressure being kept constant in the range of 1.50-1.55 hPa.
  • the gas mixture is then transferred by a high-frequency discharge in the plasma-shaped state, wherein the
  • radiated power is 400W.
  • the orange-yellow product is removed from the reactor by dissolving in a little SiCl 4 .
  • 86.5 g of chlorinated polysilane remain in the form of an orange-yellow viscous mass.
  • 80 g of a chlorinated polysilane obtained in this way are mixed with 36.5 g
  • the chain length refers to the number of directly interconnected silicon atoms in a compound.
  • the term "average chain length" those compounds in which 3 ⁇ n ⁇ 50, preferably 3 ⁇ n ⁇ 9, more preferably 3 ⁇ n ⁇ 7.
  • longer-chain used here refers to those compounds in which n> 3. Where n is the
  • Contaminants are present in the mixture than is usual at high levels of purity for fine chemicals (e.g.,> 99%). Therefore, here is meant a purity of at least 99.9%.
  • polysilane such as SiCl 4 , benzene, toluene, paraffin, etc.
  • the polysilane preferably meets the requirements for
  • monosilanes can be used as starting materials for the process according to the invention

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Silicon Polymers (AREA)
  • Silicon Compounds (AREA)

Abstract

La présente invention concerne des polysilanes à longueur de chaîne moyenne se présentant sous forme de composé pur ou de mélange de composés comprenant chacun au moins une liaison directe Si-Si, dont les substituants sont composés exclusivement d'halogène et/ou d'hydrogène, dont les longueurs de chaîne moyennes n sont supérieures à 3 et inférieures à 50, de préférence supérieures à 3 et inférieures à 9, mieux encore supérieures à 3 et inférieures à 7, et dans la composition desquels le rapport atomique substituant/silicium est d'au moins 1/1. L'invention concerne, en outre, un procédé de préparation de ces polysilanes.
EP11730630.8A 2010-07-02 2011-07-04 Polysilanes à longueur de chaîne moyenne et procédé pour leur préparation Withdrawn EP2588411A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010025948A DE102010025948A1 (de) 2010-07-02 2010-07-02 Polysilane mittlerer Kettenlänge und Verfahren zu deren Herstellung
PCT/EP2011/061258 WO2012001180A1 (fr) 2010-07-02 2011-07-04 Polysilanes à longueur de chaîne moyenne et procédé pour leur préparation

Publications (1)

Publication Number Publication Date
EP2588411A1 true EP2588411A1 (fr) 2013-05-08

Family

ID=44544097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11730630.8A Withdrawn EP2588411A1 (fr) 2010-07-02 2011-07-04 Polysilanes à longueur de chaîne moyenne et procédé pour leur préparation

Country Status (7)

Country Link
US (1) US20130216465A1 (fr)
EP (1) EP2588411A1 (fr)
JP (1) JP2013529591A (fr)
KR (1) KR101569594B1 (fr)
CN (1) CN103080006A (fr)
DE (1) DE102010025948A1 (fr)
WO (1) WO2012001180A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013021306A1 (de) * 2013-12-19 2015-06-25 Johann Wolfgang Goethe-Universität Verfahren zum Herstellen von linearen, cyclischen und/oder käfigartigen perhalogenierten Oligo- und Polysilyl-Anionen
DE102014109275A1 (de) * 2014-07-02 2016-01-07 Spawnt Private S.À.R.L. Verfahren zur Herstellung von Nanopartikeln, Nanopartikel und deren Verwendung
DE102014013250B4 (de) 2014-09-08 2021-11-25 Christian Bauch Verfahren zur Aufreinigung halogenierter Oligosilane
KR101945215B1 (ko) * 2016-02-16 2019-02-07 쇼와 덴코 가부시키가이샤 올리고실란의 제조 방법
US11401166B2 (en) 2018-10-11 2022-08-02 L'Air Liaquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Process for producing isomer enriched higher silanes
US11097953B2 (en) 2018-10-11 2021-08-24 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Process for producing liquid polysilanes and isomer enriched higher silanes
US10752507B2 (en) 2018-10-11 2020-08-25 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Process for producing liquid polysilanes and isomer enriched higher silanes

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Also Published As

Publication number Publication date
DE102010025948A1 (de) 2012-01-05
CN103080006A (zh) 2013-05-01
JP2013529591A (ja) 2013-07-22
KR101569594B1 (ko) 2015-11-16
WO2012001180A1 (fr) 2012-01-05
US20130216465A1 (en) 2013-08-22
KR20130072237A (ko) 2013-07-01

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