Journal
CHEMISTRY OF MATERIALS
Volume 13, Issue 5, Pages 1700-1707Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm001244l
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Polyborazilene, a precursor for hexagonal boron nitride (h-BN) ceramics, has been extensively characterized by N-15 and B-11 MAS NMR. The various B and N sites have been identified according to their first neighboring atoms as well as to the second ones in the case of N-15 and have also been quantified. This study demonstrates that a suitable choice of NMR techniques together with the use of isotopic enrichment can lead to a large improvement in spectral resolution, which allows better understanding of such complex BN preceramic polymer structures.
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