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Synthesis and Decomposition of a Novel Carboxylate Precursor to Indium Oxide

Published online by Cambridge University Press:  15 February 2011

Aloysius F. Hepp ,
Maria T. Andras ,
Stan A. Duraj ,
Eric B. Clark ,
David G. Hehemann ,
Daniel A. Scheiman  and
Phillip E. Fanwick
Aloysius F. Hepp
Affiliation:
NASA Lewis Research Center, Photovoltaic Branch, M.S. 302-1, Cleveland, OH 44135
Maria T. Andras
Affiliation:
Department of Chemistry, Cleveland State University, Cleveland, OH, 44115
Stan A. Duraj
Affiliation:
Department of Chemistry, Cleveland State University, Cleveland, OH, 44115
Eric B. Clark
Affiliation:
NASA Lewis Research Center, Photovoltaic Branch, M.S. 302-1, Cleveland, OH 44135
David G. Hehemann
Affiliation:
School of Technology, Kent State University, Kent, OH 44242
Daniel A. Scheiman
Affiliation:
Sverdrup Technology, Inc., 2001 Aerospace Parkway, Brook Park, OH 44142
Phillip E. Fanwick
Affiliation:
Department of Chemistry, Purdue University, West Lafayette, IN 47907
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Abstract

Reaction of metallic indium with benzoyl peroxide in 4-methylpyridine (4-Mepy) at 25 °C produces an eight-coordinate mononuclear indium(III) benzoate, In(η2-O2CC6H5)3(4- Mepy)2 4H2O (I), in yields of up to 60%. The indium(III) benzoate was fully characterized by elemental analysis, spectroscopy, and X-ray crystallography; (I) exists in the crystalline state as discrete eight-coordinate molecules; the coordination sphere around the central indium atom is best described as pseudo-square pyramidal. Thermogravimetric analysis of (I) and X-ray diffraction powder studies on the resulting pyrolysate demonstrate that this new benzoate is an inorganic precursor to indium oxide. Decomposition of (I) occurs first by loss of 4-methylpyridine ligands (100°-200°C), then loss of benzoates with formation of In2O3 at 450°C. We discuss both use of carboxylates as precursors and our approach to their preparation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 335: Symposium Y – Metal-Organic Chemical Vapor Deposition of Electronic Ceramics , 1993 , 227
Copyright
Copyright © Materials Research Society 1994

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