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Title: Thermal chemistry of copper(I)-N,N '-di-sec-butylacetamidinate on Cu(110) single-crystal surfaces

Abstract

The surface chemistry of copper(I)-N,N'-di-sec-butylacetamidinate on Cu(110) single-crystal surfaces has been characterized under ultrahigh vacuum by temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy. A series of thermal stepwise conversions were identified, starting with the partial dissociative adsorption of the copper acetamidinate dimers into a mixture of monomers and dimers on the surface. An early dissociation of a C-N bond leads to the production of N-sec-butylacetamidine, which is detected in TPD experiments in three temperature regimes, the last one centered around 480 K. Butene, and a small amount of butane, is also detected above approximately 500 K, and hydrogen production, an indication of dehydrogenation of surface fragments, is observed at 460, 550 and 670 K. In total, only about 10% of the initial copper(I)-N,N'-di-sec-butylacetamidinate adsorbed monolayer decomposes, and only about {approx}3% of carbon is left behind on the surface after heating to high temperatures. The implications of this surface chemistry to the design of chemical film growth processes using copper acetamidinates as precursors are discussed.

Authors:
; ;  [1]
  1. Department of Chemistry, University of California, Riverside, California 92521 (United States)
Publication Date:
OSTI Identifier:
22054132
Resource Type:
Journal Article
Journal Name:
Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films
Additional Journal Information:
Journal Volume: 30; Journal Issue: 1; Other Information: (c) 2012 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1553-1813
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACETAMIDE; ADSORPTION; BUTANE; BUTENES; CHEMISTRY; COPPER; COPPER COMPOUNDS; CRYSTAL GROWTH; DEHYDROGENATION; DIMERS; HEAT TREATMENTS; HYDROGEN PRODUCTION; MONOCRYSTALS; MONOMERS; PYROLYSIS; SURFACES; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Qiang, Ma, Zaera, Francisco, Gordon, Roy G, and Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138. Thermal chemistry of copper(I)-N,N '-di-sec-butylacetamidinate on Cu(110) single-crystal surfaces. United States: N. p., 2012. Web. doi:10.1116/1.3658381.
Qiang, Ma, Zaera, Francisco, Gordon, Roy G, & Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138. Thermal chemistry of copper(I)-N,N '-di-sec-butylacetamidinate on Cu(110) single-crystal surfaces. United States. https://doi.org/10.1116/1.3658381
Qiang, Ma, Zaera, Francisco, Gordon, Roy G, and Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138. 2012. "Thermal chemistry of copper(I)-N,N '-di-sec-butylacetamidinate on Cu(110) single-crystal surfaces". United States. https://doi.org/10.1116/1.3658381.
@article{osti_22054132,
title = {Thermal chemistry of copper(I)-N,N '-di-sec-butylacetamidinate on Cu(110) single-crystal surfaces},
author = {Qiang, Ma and Zaera, Francisco and Gordon, Roy G and Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138},
abstractNote = {The surface chemistry of copper(I)-N,N'-di-sec-butylacetamidinate on Cu(110) single-crystal surfaces has been characterized under ultrahigh vacuum by temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy. A series of thermal stepwise conversions were identified, starting with the partial dissociative adsorption of the copper acetamidinate dimers into a mixture of monomers and dimers on the surface. An early dissociation of a C-N bond leads to the production of N-sec-butylacetamidine, which is detected in TPD experiments in three temperature regimes, the last one centered around 480 K. Butene, and a small amount of butane, is also detected above approximately 500 K, and hydrogen production, an indication of dehydrogenation of surface fragments, is observed at 460, 550 and 670 K. In total, only about 10% of the initial copper(I)-N,N'-di-sec-butylacetamidinate adsorbed monolayer decomposes, and only about {approx}3% of carbon is left behind on the surface after heating to high temperatures. The implications of this surface chemistry to the design of chemical film growth processes using copper acetamidinates as precursors are discussed.},
doi = {10.1116/1.3658381},
url = {https://www.osti.gov/biblio/22054132}, journal = {Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films},
issn = {1553-1813},
number = 1,
volume = 30,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2012},
month = {Sun Jan 15 00:00:00 EST 2012}
}