Photochemical synthesis of disilane from silane with infrared laser radiation

Journal Article · Thu Jul 27 04:00:00 EDT 1989 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100352a019· OSTI ID:7171082

Zavelovich, J ^[1]; Lyman, J L ^[2]

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1. Amoco Technology Co., Naperville, IL (USA)
2. Los Alamos National Lab., NM (USA)

The authors report the clean and efficient conversion of silane to disilane by CO{sub 2} laser irradiation. The direct irradiation of pure silane at high pressures (from 75 to 1,700 Torr) converts silane to disilane with high selectivity and with efficient use of the absorbed laser radiation. Hydrogen is the only other major volatile product, and the production of solid products is minimal. The proposed mechanism of the photochemical reaction includes (1) collisionally enhanced absorption of the laser radiation by silane, (2) collisional deexcitation of the vibrationally excited silane, (3) concurrent decomposition to SiH{sub 2} and H{sub 2}, (4) production of vibrationally excited disilane by SiH{sub 2} insertion into a silane Si-H bond, (5) collisional quenching of the excited disilane, and (6) rapid cooling of the irradiated gas by thermal expansion. They support the proposed mechanism by additional experiments and model calculations.

• OSTI ID: 7171082
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:15; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400000* -- Chemistry
400500 -- Photochemistry
CHEMISTRY
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
FILMS
HIGH PRESSURE
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
LASERS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
PHOTOCHEMISTRY
SEMIMETALS
SILANES
SILICON
SILICON COMPOUNDS
SYNTHESIS
THIN FILMS