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Synthesis and characterization of poly(aminoborane) as a new boron nitride precursor

✍ Scribed by Dong-Pyo Kim; Kyo-Tae Moon; Joong-Gon Kho; James Economy; Christel Gervais; Florence Babonneau

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
198 KB
Volume
10
Category
Article
ISSN
1042-7147

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✦ Synopsis

During the solution reaction of NaBH 4 /(NH 4 ) 2 SO 4 in tetraglyme to form borazine, polymeric aminoborane (NH 2 BH 2 ) x has been isolated as a white powder. The powder was characterized by thermal gravimetric analysis/differential scanning calorimetry, infrared and mass spectroscopies, and powder X-ray diffraction. Solid-state 15 N and 11 B nuclear magnetic resonance firmly proved that the chain-like poly(aminoborane) evolved a partially condensed B 3 N 3 ring structure by dehydrogenative condensation between chains at 200 °C. Pyrolysis of the polymer in a nitrogen stream up to 1400 °C led to a 75% yield of hexagonal boron nitride with an interlayer spacing of 3.37 A Ê .

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