Functionalized zeolitic imidazolate framework F-ZIF-90 as efficient catalyst for the cycloaddition of carbon dioxide to allyl glycidyl ether
Functionalized zeolitic imidazolate framework F-ZIF-90 as efficient catalyst for the cycloaddition of carbon dioxide to allyl glycidyl ether
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DOI：
10.1016/j.cattod.2014.05.022
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发表时间：
2015-05
期刊：
影响因子：
5.3
通讯作者：
T. Jose;Yeseul Hwang;Dong-Woo Kim;M. Kim;Dae-Won Park
中科院分区：
文献类型：
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作者：
T. Jose;Yeseul Hwang;Dong-Woo Kim;M. Kim;Dae-Won Park
本研究以硝酸锌和咪唑-2-羧醛(ICA)为原料合成了分子筛咪唑骨架(ZIF-90)，然后用肼对其进行后官能化，得到F-ZIF-90。用元素分析(EA)、比表面积(BET)、X射线衍射仪、~(13)C核磁共振、FT-IR和扫描电子显微镜对ZIF进行了表征。由于孔内官能化，F-ZIF-90的比表面积和孔体积均小于ZIF-90。F-ZIF-90对烯丙基缩水甘油醚(AGE)和二氧化碳合成环状碳酸酯具有良好的催化活性。考察了催化剂用量、反应时间、CO2压力、反应温度等反应参数对F-ZIF-90反应活性的影响，提出了F-ZIF-90催化剂的反应机理。然而，F-ZIF-90催化剂在重复使用时，部分失去了其晶体结构和优异的催化性能。
In this study, zeolitic imidazolate framework (ZIF-90) was synthesized from Zn(NO3)2·4H2O and imidazolate-2-carboxyaldehyde (ICA), then it was post-functionalized to form F-ZIF-90 using hydrazine followed by quaternization. The ZIFs were characterized by elemental analysis (EA), BET, XRD,13C NMR, FT-IR, and SEM. The surface area and pore volume of F-ZIF-90 were smaller than those of ZIF-90 due to functionalization inside the pores. The F-ZIF-90 showed excellent catalytic activity for the synthesis of the cyclic carbonate from allyl glycidyl ether (AGE) and carbon dioxide. The effects of the reaction parameters such as catalyst amount, reaction time, CO2pressure, and reaction temperature on the reactivity of F-ZIF-90 were also studied, and reaction mechanism including the role of F-ZIF-90 catalyst was proposed. The F-ZIF-90 catalyst, however, partially lost its crystalline structure and superior catalytic performance when it was reused.