Synthesis of amorphous boron nitride from the molecular precursor ammonia-monochloroborane

Ammonia-monochloroborane, NH3BH2Cl, has been synthesized from the reaction of ammonia-borane with HCl in Et2O. Decomposition of the solid under NH3 to 600 °C produced amorphous BN in 97% yield. The 11B magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectrum of the amorphous BN is indica...

Full description

Saved in:
Bibliographic Details
Published inJournal of materials research Vol. 14; no. 5; pp. 1934 - 1938
Main Authors Ketchum, Douglas R., DeGraffenreid, Allison L., Niedenzu, Philipp M., Shore, Sheldon G.
Format Journal Article
LanguageEnglish
Published New York, USA Cambridge University Press 01.05.1999
Online AccessGet full text

Cover

More Information
Summary:Ammonia-monochloroborane, NH3BH2Cl, has been synthesized from the reaction of ammonia-borane with HCl in Et2O. Decomposition of the solid under NH3 to 600 °C produced amorphous BN in 97% yield. The 11B magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectrum of the amorphous BN is indicative of boron in the same environment as in hexagonal BN. Subsequent pyrolysis of the amorphous BN to 1000 °C produced turbostratic BN. Pyrolysis of NH3BH2Cl under vacuum to 1100 °C led to the formation of turbostratic BN as confirmed by x-ray diffraction (XRD) analysis. Gas evolution during this pyrolysis confirmed that the precursor loses H2 and HCl.
Bibliography:PII:S0884291400049633
istex:435E6388D4019633E5CCE8AC5527848B858E87E1
ark:/67375/6GQ-W9SGJ2N5-3
a)Address all correspondence to this author.
ArticleID:04963
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.1999.0260