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Electron stimulated C–F bond breaking kinetics in fluorine-containing organic thin films

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Title: Electron stimulated C–F bond breaking kinetics in fluorine-containing organic thin films
Authors: Perry, C.C.1, Wagner, Anthony J.1, Howard Fairbrother, D. howardf@jhu.edu
Source: Chemical Physics. Jun2002, Vol. 280 Issue 1/2, p111. 8p.
Subjects: Molecular self-assembly, Monomolecular films, Fluorene, Scission (Chemistry)
Abstract: By monitoring the variation in the fluorine content and the distribution of CFx (x=0–3) species in a semifluorinated self-assembled monolayer (CF-SAM) upon prolonged X-ray irradiation, the electron stimulated C–F bond breaking kinetics in fluorine-containing organic films has been determined. At short irradiation times, X-ray irradiation induced changes in the film''s chemical composition are consistent with the presence of C–F, C–C and S–Au bond cleavage events. In contrast, C–F bond breaking is identified as the dominant kinetic process for longer X-ray exposures. The kinetics of X-ray induced defluorination are consistent with a first-order decay process mediated by a series of consecutive C–F bond breaking events (e.g., CF→C) whose rate constants are in excellent agreement with a stochastic model of defluorination. [Copyright &y& Elsevier]
Copyright of Chemical Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 7822334
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Electron stimulated C–F bond breaking kinetics in fluorine-containing organic thin films
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  Data: <searchLink fieldCode="AR" term="%22Perry%2C+C%2EC%2E%22">Perry, C.C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wagner%2C+Anthony+J%2E%22">Wagner, Anthony J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Howard+Fairbrother%2C+D%2E%22">Howard Fairbrother, D.</searchLink><i> howardf@jhu.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Physics%22">Chemical Physics</searchLink>. Jun2002, Vol. 280 Issue 1/2, p111. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Molecular+self-assembly%22">Molecular self-assembly</searchLink><br /><searchLink fieldCode="DE" term="%22Monomolecular+films%22">Monomolecular films</searchLink><br /><searchLink fieldCode="DE" term="%22Fluorene%22">Fluorene</searchLink><br /><searchLink fieldCode="DE" term="%22Scission+%28Chemistry%29%22">Scission (Chemistry)</searchLink>
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  Data: By monitoring the variation in the fluorine content and the distribution of <f>CFx (x=0–3)</f> species in a semifluorinated self-assembled monolayer (CF-SAM) upon prolonged X-ray irradiation, the electron stimulated C–F bond breaking kinetics in fluorine-containing organic films has been determined. At short irradiation times, X-ray irradiation induced changes in the film''s chemical composition are consistent with the presence of C–F, C–C and S–Au bond cleavage events. In contrast, C–F bond breaking is identified as the dominant kinetic process for longer X-ray exposures. The kinetics of X-ray induced defluorination are consistent with a first-order decay process mediated by a series of consecutive C–F bond breaking events (e.g., <f>CF→C</f>) whose rate constants are in excellent agreement with a stochastic model of defluorination. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/S0301-0104(02)00561-X
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 111
    Subjects:
      – SubjectFull: Molecular self-assembly
        Type: general
      – SubjectFull: Monomolecular films
        Type: general
      – SubjectFull: Fluorene
        Type: general
      – SubjectFull: Scission (Chemistry)
        Type: general
    Titles:
      – TitleFull: Electron stimulated C–F bond breaking kinetics in fluorine-containing organic thin films
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            NameFull: Perry, C.C.
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            NameFull: Wagner, Anthony J.
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              Text: Jun2002
              Type: published
              Y: 2002
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              Value: 280
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              Value: 1/2
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            – TitleFull: Chemical Physics
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