沸石咪唑骨架材料（ZIF-8）的结构生长过程

摘要

Zeolitic imidazolate framework-8 (ZIF-8) was synthesized at room temperature by using 2-methylimidazole as an organic ligand, Zn(NO3)2 as metal ions source and methanol as solvent. The structure and formation process of ZIF-8 were characterized by using FTIR, XRD, TEM and TG. The results showed that ZIF-8 crystals are formed quickly at the initial stage, and they gradually grow up to form hexagon and dodecahedron in 3D. A fundamental understanding of ZIF-8 structural evolution could facilitate the preparation of functional metal-organic frame-work phases with controlled crystal size and morphology.%以2-甲基咪唑为有机配体，由硝酸锌提供金属离子，在室温下以甲醇为溶剂合成了沸石咪唑骨架（ZIF-8）晶体。通过红外光谱、X射线衍射、透射电子显微镜、热重分析等手段对晶体结构及其生长过程进行了表征。结果表明：随着反应时间延长ZIF-8晶体迅速形成，然后逐渐堆积成六面体二维结构，进而形成三维十二面体结构。对ZIF-8结构的生长过程的理解有助于通过控制ZIF-8的大小和形态来制备出功能化的金属有机骨架材料。