title: Surface Raman spectroscopy of the interface of tris-(8-hydroxyquinoline) aluminum with Mg.
abstract: Surface Raman spectroscopy in ultrahigh vacuum is used to interrogate interfaces formed between tris-(8-hydroxyquinoline) aluminum (Alq(3)) and vapor-deposited Mg. The Raman spectral results for deposition of Mg mass thicknesses between 5 and 20 A indicate formation of a complex interfacial region composed primarily of Mg-Alq(3) 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 nu(ring), nu(C-N), nu(Al-N), and nu(Al-O) modes along with the appearance of nu(Mg-C) and nu(Mg-O) modes suggest a structure for the Mg-Alq(3) adduct in which Mg is bound to the O and C atoms of Alq(3). In addition, several intense, broad modes are observed that are consistent with partial graphitization of the Alq(3) film.
authors: Department of Chemistry, University of Arizona, 1306 E. University Boulevard, Tucson, Arizona 85721, USA.
authors: Robert J
authors: RJ
authors: Davis
authors: Jeanne E
authors: JE
authors: Pemberton
mesh_terms: D018360:Crystallography, X-Ray; D006108:Graphite / Q000737:chemistry; D008274:Magnesium / Q000737:chemistry*; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
chemical_list: D009942:Organometallic Compounds; C500391:tris(8-quinolinolato-N1,O8)aluminum; D006108:Graphite; D008274:Magnesium