An investigation on the synthesis of borazine

作者:Li, Jun sheng*; Zhang, Chang rui; Li, Bin; Cao, Feng; Wang, Si qing
来源:Inorganica Chimica Acta, 2011, 366(1): 173-176.
DOI:10.1016/j.ica.2010.10.030

摘要

Borazine is a promising precursor for boron nitride. A detailed investigation on the reaction of sodium borohydride and ammonium sulfate from 40 degrees C to 120 degrees C for synthesis of borazine was performed. The reaction was monitored by means of (11)B nuclear magnetic resonance ((11)B NMR) and Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), mass spectroscopy (MS). The reaction produces mainly ammonia borane (AB), but not borazine at temperatures below 60 degrees C. Increases of temperature promote yield of borazine, which reaches the maximum around 110 degrees C. Whereas further increased temperature causes severe polymerization of borazine, and hence holds back yields of borazine.