Surface Raman spectroscopy of the interface of tris-(8-hydroxyquinoline) aluminum with Mg

Robert J. Davis, Jeanne E. Pemberton

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Surface Raman spectroscopy in ultrahigh vacuum is used to interrogate interfaces formed between tris-(8-hydroxyquinoline) aluminum (Alq3) and vapor-deposited Mg. The Raman spectral results for deposition of Mg mass thicknesses between 5 and 20 Å indicate formation of a complex interfacial region composed primarily of Mg-Alq3 adducts and small-grained amorphous or nanocrystalline graphite, the presence of which may have a significant effect on the electronic properties of this metal-organic interface. The observed shifts in νring, ν(C-N), ν(Al-N), and ν(Al-O) modes along with the appearance of ν(Mg-C) and ν(Mg-O) modes suggest a structure for the Mg-Alq3 adduct in which Mg is bound to the O and C atoms of Alq3. In addition, several intense, broad modes are observed that are consistent with partial graphitization of the Alq 3 film.

Original languageEnglish (US)
Pages (from-to)10009-10014
Number of pages6
JournalJournal of the American Chemical Society
Volume131
Issue number29
DOIs
StatePublished - Jul 29 2009

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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