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首页> 外文期刊>Chemistry: A European journal >Probing the Lewis Acidity and Catalytic Activity of the Metal-Organic Framework [Cu_3(btc)_2] (BTC=Benzene-l,3,5-tricarboxylate)
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Probing the Lewis Acidity and Catalytic Activity of the Metal-Organic Framework [Cu_3(btc)_2] (BTC=Benzene-l,3,5-tricarboxylate)

机译：探索金属有机骨架[Cu_3（btc）_2]（BTC =苯-1,3,5-三羧酸盐）的路易斯酸度和催化活性

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摘要

An optimized procedure was designed for the preparation of the mi-croporous metal-organic framework (MOF) [Cu_3(btc)_2] (BTC=benzene-1,3,5-tricarboxylate).The crystalline material was characterized by X-ray diffraction,optical microscopy,SEM,X-ray photoelectron spectroscopy,N_2 sorption,thermogravimetry,and IR spectroscopy of adsorbed CO.CO ad-sorbs on a small number of Cu_2O im-purities,and particularly on the free Cu~(II) coordination sites in the frame-work.[Cu_3(btc)_2] is a highly selective Lewis acid catalyst for the isomeriza-tion of terpene derivatives,such as the rearrangement of alpha-pinene oxide to campholenic aldehyde and the cycliza-tion of citronellal to isopulegol.By using the ethylene ketal of 2-bromo-propiophenone as a test substrate,it was demonstrated that the active sites in [Cu_3(btc)_2] are hard Lewis acids.Catalyst stability,re-usability,and het-erogeneity are critically assessed.
机译：设计了优化的制备微孔金属有机骨架（MOF）[Cu_3（btc）_2]（BTC =苯-1,3,5-三羧酸盐）的方法。用X射线对晶体材料进行了表征吸附的CO.CO的衍射，光学显微镜，SEM，X射线光电子能谱，N_2吸附，热重分析和IR光谱吸附在少量Cu_2O杂质上，尤其是在游离Cu〜（II）配位上[Cu_3（btc）_2]是一种高度选择性的路易斯酸催化剂，用于萜烯衍生物的异构化，例如将α-pine烯氧化物重排为樟脑醛，以及将香茅醛环化为以2-溴苯乙酮的乙烯缩酮为底物，证明[Cu_3（btc）_2]中的活性部位为硬路易斯酸。催化剂的稳定性，可重复使用性和异质性为严格评估。

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