Autocatalytic behavior of trimethylindium during thermal decomposition
Pyrolysis of trimethylindium (TMIn) in a hot-wall flow-tube reactor has been investigated at temperatures between 573 and 723 K using a modulated molecular-beam mass-sampling technique and detailed numerical modeling. The TMIn was exposed to various mixtures of carrier gases: He, H{sub 2}, D{sub 2}, and C{sub 2}H{sub 4}, in an effort to elucidated the behavior exhibited by this compound in different chemical environments. The decomposition of TMIn is a heterogeneous, autocatalytic process with an induction period that is carrier-gas dependent and lasts on the order of minutes. After activation of the tube wall, the thermolysis exhibits a steady-state behavior that is surface mediated. This result is contrary to prior literature reports, which state that decomposition occurs in the gas phase via successive loss of the CH{sub 3} ligands. This finding also suggests that the bond dissociation energy for the (CH{sub 3}){sub 2}In-CH{sub 3} bond derived from flow-tube investigations is erroneous and should be reevaluated.
- Research Organization:
- Sandia National Lab., Livermore, CA (US)
- OSTI ID:
- 20050897
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 2 Vol. 12; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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