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首页> 外文期刊>Journal of industrial and engineering chemistry >Allyl functionalized UiO-66 metal-organic framework as a catalyst for the synthesis of cyclic carbonates by CO2 cycloaddition
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Allyl functionalized UiO-66 metal-organic framework as a catalyst for the synthesis of cyclic carbonates by CO2 cycloaddition

机译：烯丙基官能化UIO-66金属有机框架作为合成Co2环加成的环状碳酸酯的催化剂

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摘要

The conversion of epoxides to cyclic carbonates is one of the most common CO2 fixation reactions. Metal-organic frameworks (MOFs), due to their porosity, easily tunable properties and Lewis acidic sites, are extensively used in heterogeneous catalysis. In this paper, we report the derivatization of the metal-organic framework (MOF) UiO-66 (University of Oslo) with allyloxy groups to give UiO-66-BAT (BAT= bisallyloxyterephthalate). The catalyst was characterized by PXRD, BET, IR, SEM, digestion NMR and CO2 adsorption. UiO-66-BAT had a good CO2 uptake of 84 cc/g at 273K and a Qst value of 27.5 kJ mol(-1). Due to the affinity of the allyloxy group toward CO2 and the proximity of the zirconium Lewis acid sites, we applied UiO-66-BAT as a catalyst for the conversion of epoxides to cyclic carbonates by using CO2. We showed that UiO-66-BAT converts propylene oxide (PO) to its corresponding cyclic carbonates at 50 degrees C, a 5 bar pressure, and a 6 h reaction time with a 95% yield. UiO-66-BAT also gave a good yield in the conversion of numerous aliphatic and aromatic epoxides. The catalysts exhibited a good recyclability for up to 9 cycles. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：环氧化物转化为环状碳酸盐是最常见的CO 2固定反应之一。由于它们的孔隙率，易调谐性质和路易斯酸性位点，金属有机框架（MOF）广泛用于异质催化。在本文中，我们将金属 - 有机框架（MOF）UIO-66（OSLO大学）用烯丙氧基衍生化，得到UIO-66-BAT（BAT =苯甲酸二丙酯）。催化剂的特征在于PXRD，BET，IR，SEM，消化NMR和CO 2吸附。 UIO-66-BAT在273K时具有84cc / g的良好二氧化碳吸收，QST值为27.5 kJ摩尔（-1）。由于烯丙氧基族对二氧化碳的亲和力和锆路易斯酸的邻近，通过使用CO 2将UIO-66-BAT作为催化剂作为催化剂，以通过使用CO 2将环氧化物转化为环碳酸盐。我们表明，UIO-66-BAT在50℃，5巴压力下将环氧丙烷（PO）转化为其相应的环碳酸酯，并以95％收率为6小时反应时间。 UIO-66-BAT还良好的产量在众多脂族和芳香环氧化物的转化中得到了良好的产量。催化剂表现出良好的再循环性，最多9个循环。 （c）2020朝鲜工业与工程化学学会。 elsevier b.v出版。保留所有权利。

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