Solution-Mediated Transformation of a 1D [Zn（Im）（HIm）2（OAc）] Precursor to Several Different 3D Zn（Im）2 Frameworks

作     者：Youjun Guan Qi Shi Jinxiang Dong 

作者机构：College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan Shanxi 030024 China 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2017年第35卷第7期

页      面：1086-1090页

核心收录：

学科分类：1007[医学-药学(可授医学、理学学位)] 100705[医学-微生物与生化药学] 09[农学] 0901[农学-作物学] 10[医学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China (No. 21306126) 

主　　题：zinc metal-organic framework phase transitions 

摘      要：1D compound [Zn（Im）（HIm）2（OAc）] was used as a single precursor of metal and imidazole to prepare several 3-dimensional （3D） Zn（Im）2 frameworks by solution-mediated transformation. Specifically, three known topologies, zni, coi and crb （BCT） were obtained using a solution-mediated transformation with CH3OH, DMF and DMA as solvent, respectively. Structural studies by 13C MAS NMR spectroscopy and TG imply that in the transformation process from 1D compound to coi-[Zn（Im）2]·（DMF）x and crb-[Zn（Im）2]·（DMA）x （ZIF-1）, DMF and DMA solvent molecules acted as structure-directing agent and, therefore, were occluded inside the framework, respectively. In contrast, in the formation of zni-[Zn（Im）2], no solvent molecules were present in the frameworks; therefore the transformation from 1 D compound to zni was induced by temperature. Thus, solution-mediated transformation of a single precursor （1 D compound） approach was established for the synthesis of ZIFs.