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

Robert J. Davis; Jeanne E. Pemberton

doi:10.1021/ja808021d

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

Robert J. Davis
, Jeanne E. Pemberton

Research output: Contribution to journal › Article › peer-review

24 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 ν_ring, 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 language	English (US)
Pages (from-to)	10009-10014
Number of pages	6
Journal	Journal of the American Chemical Society
Volume	131
Issue number	29
DOIs	https://doi.org/10.1021/ja808021d
State	Published - Jul 29 2009

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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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 (Alq3) and vapor-deposited Mg. The Raman spectral results for deposition of Mg mass thicknesses between 5 and 20 {\AA} 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.",

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T1 - Surface Raman spectroscopy of the interface of tris-(8-hydroxyquinoline) aluminum with Mg

AU - Davis, Robert J.

AU - Pemberton, Jeanne E.

PY - 2009/7/29

Y1 - 2009/7/29

N2 - 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.

AB - 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.

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

Abstract

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