CAJ | 학술논문

基于沸石咪唑骨架材料在离子液体和低共熔溶剂中冷却结晶的析出方式，开发了一种离子热法合成沸石咪唑骨架材料的新途径，采用X射线衍射、扫描电镜、核磁共振光谱、红外光谱以及热重分析等方法对制备的产物进行了表征，研究了合成条件对产物结晶度、尺寸和形貌的影响，探讨了沸石咪唑骨架材料在离子热合成体系中的溶解-结晶析出机理。研究发现，冷却速率能够影响产物形貌，急速冷却时， sod (RCSR代码)型产物的形貌为球形， zni (RCSR代码)型产物为棒状或平板状；程序控制冷却时， sod型产物的形貌为多面体， zni型产物呈团簇状。
기우비석미서골가재료재리자액체화저공용용제중냉각결정적석출방식，개발료일충리자열법합성비석미서골가재료적신도경，채용X사선연사、소묘전경、핵자공진광보、홍외광보이급열중분석등방법대제비적산물진행료표정，연구료합성조건대산물결정도、척촌화형모적영향，탐토료비석미서골가재료재리자열합성체계중적용해-결정석출궤리。연구발현，냉각속솔능구영향산물형모，급속냉각시， sod (RCSR대마)형산물적형모위구형， zni (RCSR대마)형산물위봉상혹평판상；정서공제냉각시， sod형산물적형모위다면체， zni형산물정단족상。
A cooling-induced crystallization process was used to synthesize sod (RCSR symbol)-and zni (RCSR symbol)-type zeolitic imidazolate frameworks (ZIFs) ionothermally in 1-ethyl-3-methylimidazolium bromide ionic liquid and a urea-choline chloride deep eutectic solvent. The products were charac-terized by X-ray diffraction, scanning electron microscopy, nuclear magnetic resonance spectrosco-py, infrared spectroscopy and thermal gravimetric analysis. The effect of the synthesis conditions on the crystallinity, size and morphology of the product was studied. The dissolution-crystallization mechanism of ZIFs was discussed. The cooling rate affected the product morphology. When the synthesis solution was cooled by rapid cooling, the shape of the sod-type product was spherical and the morphology of the zni-type product was rod-like or plate-like. With a programmed cooling, the sod-type product was polyhedron in shape and the zni-type product was in the form of clusters.