In Situ FTIR Analysis for the Thermal Decompositions of Trimethylgallium and Trimethylgallium-Ammonia Adduct

Seong Han Kim; Hyang Sook Kim; Jin Soo Hwang; Joong Gill Choi; Paul Joe Chong

doi:10.1021/cm00039a005

In Situ FTIR Analysis for the Thermal Decompositions of Trimethylgallium and Trimethylgallium-Ammonia Adduct

Seong Han Kim, Hyang Sook Kim, Jin Soo Hwang, Joong Gill Choi, Paul Joe Chong

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The thermal decompositions of trimethylgallium (TMG) and trimethylgallium-ammonia adduct (TMG:NH₃) have been studied using Fourier transform infrared spectroscopy. A static cold-wall reactor is designed for use in the temperature range 25–1000 °C, and the gaseous reactants and products are in situ analyzed to obtain the kinetic information. TMG:NH₃ as well as TMG is decomposed around 500 °C with liberation of the CH₃ group. In the case of TMG:NH₃, the CH₃ group abstracts hydrogen from NH₃, forming CH₄. The decomposition of NH₃ can be described as second-order kinetics, and that of TMG and TMG:NH₃ as first-order kinetics. The decomposition rate constant of TMG:NH₃ at 1.6 Torr is estimated to be log k₁ = 15–63 (kcal/mol)/2.303RT.

Original language	English
Pages (from-to)	278-281
Number of pages	4
Journal	Chemistry of Materials
Volume	6
Issue number	3
DOIs	https://doi.org/10.1021/cm00039a005
Publication status	Published - 1994 Mar 1

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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title = "In Situ FTIR Analysis for the Thermal Decompositions of Trimethylgallium and Trimethylgallium-Ammonia Adduct",

abstract = "The thermal decompositions of trimethylgallium (TMG) and trimethylgallium-ammonia adduct (TMG:NH3) have been studied using Fourier transform infrared spectroscopy. A static cold-wall reactor is designed for use in the temperature range 25–1000 °C, and the gaseous reactants and products are in situ analyzed to obtain the kinetic information. TMG:NH3 as well as TMG is decomposed around 500 °C with liberation of the CH3 group. In the case of TMG:NH3, the CH3 group abstracts hydrogen from NH3, forming CH4. The decomposition of NH3 can be described as second-order kinetics, and that of TMG and TMG:NH3 as first-order kinetics. The decomposition rate constant of TMG:NH3 at 1.6 Torr is estimated to be log k1 = 15–63 (kcal/mol)/2.303RT.",

author = "Kim, {Seong Han} and Kim, {Hyang Sook} and Hwang, {Jin Soo} and Choi, {Joong Gill} and Chong, {Paul Joe}",

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AU - Kim, Seong Han

AU - Kim, Hyang Sook

AU - Hwang, Jin Soo

AU - Choi, Joong Gill

AU - Chong, Paul Joe

PY - 1994/3/1

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N2 - The thermal decompositions of trimethylgallium (TMG) and trimethylgallium-ammonia adduct (TMG:NH3) have been studied using Fourier transform infrared spectroscopy. A static cold-wall reactor is designed for use in the temperature range 25–1000 °C, and the gaseous reactants and products are in situ analyzed to obtain the kinetic information. TMG:NH3 as well as TMG is decomposed around 500 °C with liberation of the CH3 group. In the case of TMG:NH3, the CH3 group abstracts hydrogen from NH3, forming CH4. The decomposition of NH3 can be described as second-order kinetics, and that of TMG and TMG:NH3 as first-order kinetics. The decomposition rate constant of TMG:NH3 at 1.6 Torr is estimated to be log k1 = 15–63 (kcal/mol)/2.303RT.

AB - The thermal decompositions of trimethylgallium (TMG) and trimethylgallium-ammonia adduct (TMG:NH3) have been studied using Fourier transform infrared spectroscopy. A static cold-wall reactor is designed for use in the temperature range 25–1000 °C, and the gaseous reactants and products are in situ analyzed to obtain the kinetic information. TMG:NH3 as well as TMG is decomposed around 500 °C with liberation of the CH3 group. In the case of TMG:NH3, the CH3 group abstracts hydrogen from NH3, forming CH4. The decomposition of NH3 can be described as second-order kinetics, and that of TMG and TMG:NH3 as first-order kinetics. The decomposition rate constant of TMG:NH3 at 1.6 Torr is estimated to be log k1 = 15–63 (kcal/mol)/2.303RT.

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In Situ FTIR Analysis for the Thermal Decompositions of Trimethylgallium and Trimethylgallium-Ammonia Adduct

Abstract

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