Synthesis and characterization of alkaline-earth-metal. beta. -diketonate complexes used as precursors for chemical vapor deposition of thin-film superconductors
- Univ. of Colorado, Boulder (USA)
Several of the {beta}-diketonate metal complexes used for metal organic chemical vapor deposition (MOCVD) of thin-film superconductors have been characterized by thermogravimetric analysis, mass spectrometry, and gas chromatography/mass spectrometry. The volatility of the alkaline-earth-metal chelates has been studied, and it has been determined that one reason the alkaline-earth-metal chelates are less volatile than other metal {beta}-diketonates is that they exist as oligomers. For example, one barium {beta}-diketonate chelate consists of a cluster of five metal ions bridged by {beta}-diketonate carbonyl oxygens and water molecules. It has also been found that the addition of uncomplexed (protonated) {beta}-keto enolate ligand to the carrier gas stream greatly improves the gas chromatographic behavior of these alkaline-earth-metal chelates, probably owing to adduct formation accompanying the dissociation of the oligomers. The results of these studies, as well as the implications for using these chelates together with auxiliary ligands for MOCVD, will be discussed. 3 tables, 5 figs., 26 refs.
- OSTI ID:
- 5485744
- Journal Information:
- Inorganic Chemistry; (United States), Journal Name: Inorganic Chemistry; (United States) Journal Issue: 6 Vol. 30:6; ISSN 0020-1669; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Volatile yttrium, barium, and copper compounds for preparing films of high-temperature superconductors
Synthesis and characterization of volatile bismuth [beta]-diketonate compounds for metal-organic chemical vapor deposition of thin films
Related Subjects
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPLEXES
BARIUM COMPLEXES
CALCIUM COMPLEXES
COATINGS
COMPLEXES
DATA
EXPERIMENTAL DATA
FILMS
INFORMATION
KETONES
NUMERICAL DATA
ORGANIC COMPOUNDS
SUPERCONDUCTORS
SYNTHESIS
THIN FILMS
VAPOR DEPOSITED COATINGS