Photochemical synthesis of disilane from silane with infrared laser radiation

Zavelovich, J.; Lyman, John L.

doi:10.1021/j100352a019

Cited by 8 publications

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“…Recent laboratory experiments investigated the photochemistry of silane and the subsequent reactions of the photodissociation products. These data suggested that more complex, hydrogenated silicon clusters of the generic formula Si 2 H x (x = 1-6) are formed in these processes (Cook et al 2001;Zavelovich & Lyman 1989;Hu et al 2003;Glenewinkel-Meyer et al 1993;Tonokura et al 1992;Perkins et al 1979;Borsella et al 1988;Ashfold et al 1996;Aka & Boch 2002;Wang & Huang 1998;Oikawa et al 1994). Their experiments suggest that a rich silane chemistry is expected in the circumstellar envelope of IRC+10216: photochemistry of silane molecules close to the photosphere could contribute to the formation of small hydrogenated silicon clusters of the generic formula Si 2 H x .…”

Section: Introductionmentioning

confidence: 96%

Infrared spectroscopic studies of hydrogenated silicon clusters

Kaiser

Osamura

2005

A&A

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Abstract. Silicon-bearing species Si 2 H x (x = 1-6) are probable candidates in the circumstellar envelope of IRC+10216. We have observed several fundamentals of new silicon-containing radicals Si 2 H 3 and Si 2 H 5 in addition to the well-known Si 2 H 4 and Si 2 H 6 species from infrared spectroscopy in low temperature silane matrices at 10 K. Several infrared bands identify the Si 2 H x species and can be used to search for these molecules in the circumstellar envelope of IRC+10216. These infrared bands are confirmed by ab initio quantum chemical calculation as well as via corresponding infrared spectra detected for the deuterated species Si 2 D x .

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Section: Introductionmentioning

confidence: 96%

Infrared spectroscopic studies of hydrogenated silicon clusters

Kaiser

Osamura

2005

A&A

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“…In the literature SiH2 is discussed to be the active species in a-Si:H film formation [33-353. Reactions of SiH2 in the gas phase are possible, forming higher silanes (e. g. Si2H6) by insertion of the SiH2 into Si -H-bonds of undissociated SiH4 molecules [30,31,36]. In the present paper SiH4, Si2H6, and mixtures of both were used as reactant gases.…”

Section: Introductionmentioning

confidence: 99%

Hydrogenated Amorphous Silicon by Infrared Multiphoton Absorption with a Pulsed CO₂‐Laser

Roth¹,

Chiussi²,

Dietrich³

et al. 1990

Ber Bunsenges Phys Chem

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The following work gives a discussion on hydrogenated amorphous silicon (a‐Si:H) film preparation by laser induced chemical vapor deposition (LICVD) using a pulsed CO2‐laser in a parallel configuration. Deposition rate and initiation of polymerization were studied as a function of total pressure, gas flow, gas mixture (buffer gas, silane and/or disilane), substrate temperature, and radiation flux. The results lead to a reaction model where higher silane homologues play an important role for the film production. The film properties strongly depend on the substrate temperature Ts. The activation energy Ea of the dark conductivity decreases from 1.1 eV to 0.7 eV for films prepared at Ts = 230°C to 450°C. In the same temperature range, the dark conductivity σd increases from ∼10−14 to ∼10−10 (Ω cm)−1, whereas the photo conductivity σph shows a maximum of ∼10−6 (Ω cm)−1 at Ts = 320‐330°C. These values, especially their temperature behaviour, are compared with the results of other CO2‐LICVD works and further production methods. It is shown that the film formation depends on the gas phase chemistry as well as on the substrate temperature.

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Silicon: Inorganic Chemistry

Lickiss

2005

Encyclopedia of Inorganic Chemistry

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Silicon is an element of vital importance in many areas of modern synthetic chemistry, the electronics industry and in materials science. This article attempts to summarize the many types of important inorganic derivatives of silicon but excludes the chemistry of silicates and zeolites, which are covered in separate articles. The isolation of elemental silicon from sand is described together with the various methods of purification of the element for use in the semiconductor industry. A brief description of the occurrence of silicon in biology is also given. The bulk of the article deals with compounds of silicon organized according to coordination number. One‐coordinate compounds are short‐lived intermediates and are described briefly. Two‐coordinate compounds, silylenes, have become increasingly important in recent years as are transition metal complexes in which they act as ligands. The use of bulky substituents has allowed stable silylenes to be isolated and their chemistry is described. Three‐coordinate compounds comprise radicals, cations, anions, and silanes (compounds containing a double bond to Si). These species are also generally short‐lived and reactive. The bulk of the article deals with four‐coordinate compounds and is organized according to the substituents at silicon. The industrially important hydrosilanes and halosilanes are described together with the mixed halohydrosilanes and the less common pseudohalosilanes. Alkoxysilanes are also industrially important and these are discussed with other oxygen derivatives such as esters and silanols. Compounds containing SiN bonds are also common and have interesting structural features. The preparation and structures of transition metal complexes containing silyl ligands is described. This is followed by a description of compounds containing silicon with coordination number five or six. The final section describes the analytical methods for the determination of the composition and structure of inorganic silicon compounds. Compounds containing SiC bonds are excluded throughout.

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Photochemical synthesis of disilane from silane with infrared laser radiation

Cited by 8 publications

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Infrared spectroscopic studies of hydrogenated silicon clusters

Infrared spectroscopic studies of hydrogenated silicon clusters

Hydrogenated Amorphous Silicon by Infrared Multiphoton Absorption with a Pulsed CO₂‐Laser

Silicon: Inorganic Chemistry

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Photochemical synthesis of disilane from silane with infrared laser radiation

Cited by 8 publications

References 0 publications

Infrared spectroscopic studies of hydrogenated silicon clusters

Infrared spectroscopic studies of hydrogenated silicon clusters

Hydrogenated Amorphous Silicon by Infrared Multiphoton Absorption with a Pulsed CO2‐Laser

Silicon: Inorganic Chemistry

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Hydrogenated Amorphous Silicon by Infrared Multiphoton Absorption with a Pulsed CO₂‐Laser