【摘要】 本文应用宽线NMR技术,结合红外测定,研究了缙云斜发沸石中水的结构类型、存在状态、运动特征和热稳定性。结果表明:缙云斜发沸石中的沸石水按其运动特性可以分为受阻旋转水、自由旋转水和自扩散运动水三种类型,它们以谱线中分裂的双线和线宽不同的单峰相区别。低温时,受阻旋转运动的水在晶格中转变为刚性配置。其脱水次序决定于各类型水与沸石结构骨架键合的强弱,脱水是连续的。研究显示缙云斜发沸石的结构骨架相当疏宽,骨架对水分子的吸引力没有严格的方向性,这一特性有利于阳离子的交换。更多还原

【Abstract】 By using wide-line NMR and IR techniques the structure type, existing state,motion feature and thermo-stability of water in chabazite from Jinyun havebeen studied. The results show that the zeolite-water in the chabazite can be dividedinto three types according to the motion features: hindered rotation, free rota-tion and self-diffusion in solids. They are distinguished by broken lines in thespectra and single peaks differing in width. At low temperatures water mole-cules of hindered rotation type are converted to a rigid structure in the lattice.The order of its dehydration depends on the bond strength between water mo-lecule and structure framework. Dehydration is continuous. The study shows that the structural framework of chabazite is so loosethat bonding between water molecule and framework displays no strict direct-ion, This feature is favourable for cation exchange in the structural framework.更多还原