Decomposition of fluorinated diethers on the clean iron surface

Mary E. Napier, Peter C Stair

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Polymeric perfluoroalkylethers are being considered for use as lubricants in high temperature applications, but have been observed to catalytically decompose in the presence of metals. X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption (TPD) were used to explore the decomposition of three model fluorinated ethers on clean iron surfaces. Low temperature adsorption of the model fluorinated ethers was molecular. Defluorination of the three model compounds was observed at remarkably low temperatures, 155 K and below, with formation of iron fluoride. Preferential C-F bond scission occurred at methoxy, CF3O, of perfluoro-1-methoxy-2-ethoxy ethane and perfluoro-1-methoxy-2-ethoxy propane and at CF3 CF2O of perfluo-o-1,3-diethoxy propane. The reactivity of the iron toward perfluoroalkylether decomposition when compared to other metals is due to the strength of the iron fluoride bond and the strong electron donating ability of the metallic iron.

Original languageEnglish
Pages (from-to)201-214
Number of pages14
JournalSurface Science
Volume298
Issue number1
DOIs
Publication statusPublished - Dec 10 1993

Fingerprint

Iron
Decomposition
decomposition
iron
Propane
Ethers
Fluorides
propane
fluorides
ethers
defluorination
Metals
Ethane
High temperature applications
Temperature programmed desorption
lubricants
ethane
metals
Lubricants
cleavage

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Decomposition of fluorinated diethers on the clean iron surface. / Napier, Mary E.; Stair, Peter C.

In: Surface Science, Vol. 298, No. 1, 10.12.1993, p. 201-214.

Research output: Contribution to journalArticle

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