A comparative study of the SF6-sensitized interaction of a cw-CO2 laser radiation with methyltrichloro derivatives of carbon, silicon and germanium

A comparative study of the gas-phase interaction of methyltrichloro derivatives of carbon, silicon and germanium (CH3MCl3 where M = C, Si and Ge) with sulfur hexafluoride either excited by a cw-CO2 laser radiation or under conventional static pyrolytic conditions is reported. 1,1,1-Trichloroethane and methyltrichlorogermane do not react with SF6 under laser irradiation and undergo their decomposition leading to the same products as afforded by heating: CH3CCl3 yields Cl2C=CH2 and HCl, and CH3GeCl3 gives HGeCl3 along with CH4 and C2H2. Mixtures of methyltrichlorosilane and SF6 afford under the both conditions products of the CH3SiCl3 decomposition -CH4, C2H2, HCl and SiCl4 and products of the CH3SiCl3-SF6 reaction -SiF4, SCF2 and CS2. Possible reasons for the different reactivity of CH3MCl3 compounds toward SF6 are briefly discussed. The decompositions of CH3GeCl3 to HGeCl3 offers new way for the preparation of the latter compound.

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Some chemical reactions of sulfur hexafluoride with silicon containing species stimulated by cw CO2 laser radiation

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19792092 ◽

1979 ◽

Vol 44 (7) ◽

pp. 2092-2095 ◽

Cited By ~ 8

Author(s):

Josef Pola ◽

Pavel Engst ◽

Milan Horák

Keyword(s):

Laser Radiation ◽

Chemical Reactions ◽

Carbon Disulfide ◽

Sulfur Hexafluoride ◽

Initial Pressure ◽

Reaction Vessel ◽

Silicon Tetrachloride ◽

Vibrationally Excited ◽

Cw Co2 Laser ◽

Co2 Laser Radiation

The CO2 cw laser induced interaction of sulfur hexafluoride with chlorine, silicon tetrachloride, trichlorosilane, and methyltrichlorosilane in a glass reaction vessel has been investigated. The reaction of SF6 with glass surface yielding silicon tetrafluoride and thionyl fluoride was observed. It is inhibited by the products and its rate increases with growing initial pressure (0.6-5.3 kPa) of SF6. Presumed vibrationally excited or dissociated SF6 undergoes the same reaction in the presence of chlorine and silicon tetrachloride, too. The reaction is suppressed by the addition of trichlorosilane and methyltrichlorosilane; in these cases SiF4, SiCl4 and HCl, or SiF4, SiCl4, HCl, acetylene and carbon disulfide are formed. The products indicate a non-sensitizing action of SF6 and a specific reaction channel for the formation of CS2 not attainable by pyrolysis.

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Thermovision monitoring of gas-phase fluorescence induced by cw CO2 laser radiation

Spectrochimica Acta Part A Molecular Spectroscopy ◽

10.1016/0584-8539(90)80170-4 ◽

1990 ◽

Vol 46 (4) ◽

pp. 559-562

Author(s):

J. Krása ◽

P. Engst ◽

M. Horák

Keyword(s):

Laser Radiation ◽

Gas Phase ◽

Co2 Laser ◽

Cw Co2 Laser ◽

Co2 Laser Radiation

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On the ignition of laser supported absorption waves from solid targets by CW CO2 laser radiation

10.2514/6.1984-1573 ◽

1984 ◽

Keyword(s):

Laser Radiation ◽

Co2 Laser ◽

Cw Co2 Laser ◽

Co2 Laser Radiation

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Influence of cw CO2-laser radiation on the amorphous-to-microcrystalline phase transition in a-Si:H films: a Raman spectroscopic study

Applied Physics A ◽

10.1007/s00339-013-8121-5 ◽

2013 ◽

Vol 116 (1) ◽

pp. 303-310 ◽

Cited By ~ 5

Author(s):

A. G. Kalampounias ◽

E. Farsari ◽

E. Amanatides ◽

D. Mataras ◽

G. N. Papatheodorou

Keyword(s):

Phase Transition ◽

Laser Radiation ◽

Spectroscopic Study ◽

Co2 Laser ◽

Raman Spectroscopic ◽

Raman Spectroscopic Study ◽

Cw Co2 Laser ◽

Co2 Laser Radiation

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A comparative study of second harmonic generation of pulsed CO2 laser radiation in some infrared crystals

Infrared Physics & Technology ◽

10.1016/j.infrared.2006.11.002 ◽

2007 ◽

Vol 51 (1) ◽

pp. 9-12 ◽

Cited By ~ 2

Author(s):

S. Das ◽

C. Ghosh ◽

S. Gangopadhyay

Keyword(s):

Laser Radiation ◽

Second Harmonic Generation ◽

Comparative Study ◽

Harmonic Generation ◽

Co2 Laser ◽

Second Harmonic ◽

Pulsed Co2 Laser ◽

Co2 Laser Radiation

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Studies of Metal Oxidation under the Action of CW — CO2 Laser Radiation

Trends in Quantum Electronics ◽

10.1007/978-3-662-10624-2_22 ◽

1986 ◽

pp. 313-330 ◽

Cited By ~ 1

Author(s):

I. Ursu ◽

L. C. Nistor ◽

I. N. Mihailescu ◽

V. S. Teodorescu ◽

L. Nanu ◽

...

Keyword(s):

Laser Radiation ◽

Co2 Laser ◽

Metal Oxidation ◽

Cw Co2 Laser ◽

Co2 Laser Radiation

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Carbonyl fluoride formation by cw-CO2 laser-induced and sulfur hexafluoride-sensitized decomposition of hexafluoroacetone

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19811254 ◽

1981 ◽

Vol 46 (5) ◽

pp. 1254-1257 ◽

Cited By ~ 3

Author(s):

Josef Pola ◽

Pavel Engst ◽

Milan Horák

Keyword(s):

Gas Phase ◽

Co2 Laser ◽

Sulfur Hexafluoride ◽

Phase Decomposition ◽

First Order ◽

First Order Kinetics ◽

Cw Co2 Laser ◽

Carbonyl Fluoride

The cw-CO2 laser-induced gas phase decomposition of hexafluoroacetone sensitized with sulfur hexafluoride (both 0.7-5.2 kPa) affords, besides perfluorinated hydrocarbons and minor amounts of trifluoroacetyl fluoride, carbonyl fluoride the formation of that obeys first-order kinetics and is favored with higher SF6 content.

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