A Calixarene-based {Co₉} Coordination Triangle as an Efficient Heterogenous Catalyst

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• 作者：Shentang Wang ; Yanfeng Bi ; Xinxin Hang ; Xiaofei Zhu and Wuping Liao
• 刊名：Zeitschrift für anorganische und allgemeine Chemie
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：643
• 期：2
• 页码：160-165
• 全文大小：1246K
• ISSN：1521-3749

文摘

Two triangular calixarene-based coordination assemblies, namely [M₉(HTC4A)₃(ox)₃Cl₃(H₂O)₆] [M = Co (CIAC-214) and Ni (CIAC-215); H₄TC4A = p-tert-butylthiacalix[4]arene; H₂ox = oxalic acid], were synthesized by solvothermal reactions. In both structures, three shuttlecock-like M₃-TC4A secondary building units (SBUs) as the vertices are bridged by three ox linkers to form a triangular assembly. Remarkably, the activated cobalt compound with Lewis acid sites shows high heterogeneous catalysis in the degradation of methyleneblue (with conversion of nearly 70 % in 10 min of the 3rd run) and the reduction of 2, 4-dinitrophenol (with conversion of 95.3 % in 60 min). The catalyst can be easily separated and recovered from the reaction system without significant loss of catalytic activity.