配体几何结构控制锌基金属有机框架的部分结构以实现其在克诺文格尔缩合反应中的催化性能。
Ligand geometry controlling Zn-MOF partial structures for their catalytic performance in Knoevenagel condensation.
作者信息
He Zimo, Zhao Xi, Pan Xinbo, Li Yuanyuan, Wang XiaoXiao, Xu Haitao, Xu Zhenliang
机构信息
School of Chemistry and Molecular Engineering, East China University of Science and Technology (ECUST) 130 Meilong Road Shanghai 200237 China.
State Key Laboratory of Chemical Engineering, Membrane Science and Engineering R&D Lab, Chemical Engineering Research Center, East China University of Science and Technology (ECUST) 130 Meilong Road Shanghai 200237 China
出版信息
RSC Adv. 2019 Aug 13;9(43):25170-25176. doi: 10.1039/c9ra04499j. eCollection 2019 Aug 8.
A series of novel Zn-MOFs {1Zn: [Zn(NIA)(3-bpdh)]; 2Zn: [Zn(NPA)(4-bpdh)HO]; 3Zn: [Zn(CHDA)(3-bpd)]} were constructed by dicarboxylic acid and ,'-bis(pyridine-yl-ethylidene)hydrazine. Ligand geometry revealed 1D to 3D Zn-MOF crystal topologies, whose combined-mode could be affected by the conditions. All these conditions affected the micro-nano crystal morphologies, namely 1Zn micro-sheets or nanospheres, 2Zn micro-clusters or micro-stick, and 3Zn micro-clusters or hollowspheres that were obtained. The catalysts exhibited 100% selectivity for Knoevenagel condensation reactions, among which the benzaldehyde conversion rate of the 3Zn hollowspheres was the highest, reaching a peak of 90%.
通过二羧酸和1,2'-双（吡啶基-亚乙基）肼构建了一系列新型锌基金属有机框架化合物{1Zn：[Zn(NIA)(3-bpdh)]；2Zn：[Zn(NPA)(4-bpdh)HO]；3Zn：[Zn(CHDA)(3-bpd)]}。配体几何结构揭示了从一维到三维的锌基金属有机框架晶体拓扑结构，其组合模式可能受条件影响。所有这些条件都影响了微纳晶体形态，即获得了1Zn的微片或纳米球、2Zn的微簇或微棒以及3Zn的微簇或空心球。这些催化剂对Knoevenagel缩合反应表现出100%的选择性，其中3Zn空心球的苯甲醛转化率最高，达到了90%的峰值。
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