氨硼烷同分异构体H2B(NH3)2BH4的制备

摘要

本文以NaBH4为硼源、氨基络合物为氨源制备出了能缩短氨硼烷热分解放氢诱导期的氨硼烷同分异构体H2B(NH3)2BH4.研究了反应温度、时间和溶剂等因素对H2B(NH3)2BH4产率的影响.实验结果表明:在温度为25℃,物质的量Cu(NH3)6Cl2∶NaBH4=1∶2,反应时间为10 h的条件下,制得的H2B(NH3)2BH4产率高达74％.XRD检测到反应产物中有金属Cu,经超景深显微镜观测,其粒径大小约为20 μm.%Thermal decomposition of ammonia borane usually has an induction period,which is of great significance inits practical applications.As an isomer of NHaBH3,H2B(NH3)2BH4 was synthesized by using sodium borohydride and ammonia complex,which significantly shortens the induction period of NH3BH3.The effect of reaction temperature,reaction time and solvent on the productivity of H2B(NHa)2BH4 has been investigated.The results show that the productivity of H2B(NH3)2 BH4 is about 74％ which was obtained with the molar ratio of NaBH4 ∶Cu(NH3)6Cl2 of 2/1 and the reaction time of 10h at 25℃C.A certain amount of Cu exists in the products detected by XRD,and its particle size is about 20μm observed by ultra-depth microscope.