Document Detail


Synthesis of a nitrogen-stabilized hexagonal Re(3)ZnN(x) phase using high pressures and temperatures.
MedLine Citation:
PMID:  19799428     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
High pressure can induce profound changes in solids. A significant barrier to new alloys and ceramics, however, is that targeted starting materials may not react with each other, even with the help of pressure. We use nitrogen, in a new capacity, to incorporate two otherwise unreactive elements, Re and Zn, in the same structure when pressure alone does not suffice, without nitrogen altering the resulting backbone structure. Synthesis experiments up to 20 GPa and 1800 K show that while no Re-Zn alloy or solid solution is formed, a novel Re(3)ZnN(x) ordered solid solution is formed, at 20 GPa, with nitrogen occupying Re-coordinated cages. We put forth that unlike pure Re(3)Zn, our novel hexagonal Re(3)ZnN(x) structure is stabilized by nitrogen bond formation with rhenium. Pressure lifts the pronounced ambient Zn anisotropy, making it more compatible with Re and likely facilitating incorporation of the structure-stabilizing nitrogen anion. This methodology and result denote further options for removing impasses to material preparation, thus opening new avenues for synthesis. These can also be pursued with other ions including carbon, hydrogen, and oxygen, in addition to nitrogen.
Authors:
George Serghiou; Christophe L Guillaume; Andrew Thomson; Jean-Paul Morniroli; Dan J Frost
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Chemical Society     Volume:  131     ISSN:  1520-5126     ISO Abbreviation:  J. Am. Chem. Soc.     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-11-20     Completed Date:  2010-02-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503056     Medline TA:  J Am Chem Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  15170-5     Citation Subset:  -    
Affiliation:
University of Edinburgh, School of Engineering and Centre for Materials Science, Kings Buildings, Mayfield Road, EH9 3JL UK.
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