Evidence for Initiation of Thermal Reactions of Alkenes with Hydrogen-Terminated Silicon by Surface-Catalyzed Thermal Decomposition of the Reactant

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DOIResolve DOI: http://doi.org/10.1021/la804210d
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TypeArticle
Journal titleLangmuir
Volume25
Issue10
Pages56265630; # of pages: 4
Subjectthermal reactions; microscopy; imaging
AbstractNew insights into the mechanism of thermal reactions of alkenes with hydrogen terminated silicon are presented. Scanning tunneling microscopy (STM) imaging at the early stages of the reaction of 1-decene with H/Si(111) at 150C confirm this reaction occurs via a propagating radical chain mechanism. In addition, evidence is presented for an initiation mechanism involving degradation of hydrocarbon molecules catalyzed by the silanol surface of Schlenk tubes commonly used in carrying out these reactions. Hydrogen-terminated silicon surfaces are found to be unstable in the “inert” solvent dodecane when heated at 150C in a Pyrex Schlenk tube. By contrast, the surfaces were significantly more stable at the same temperature when reactions were carried out in Teflon (polytetrafluoroethylene or PTFE). The thermal reaction of decene with H/Si(111) was found to proceed more rapidly in Pyrex than in PTFE, consistent with an impurity-based initiation mechanism.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Steacie Institute for Molecular Sciences; Executive Offices
Peer reviewedYes
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This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NPARC number16080387
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Record identifier3ef34f90-e7ee-4cd9-8bb3-3927da8893b7
Record created2010-09-21
Record modified2016-05-09
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