Leus, Karen

Liu, Ying-Ya

Van Der Voort, Pascal

English

Ghent University Academic Bibliography

Cu@COMOC-4, a bimetallic Metal-Organic Framework for the size selective epoxidation of cycloalkenes. Ying-Ya Liu, Karen Leus and Pascal Van Der Voort Center for Ordered Materials, Organometallics and Catalysis, Dept. of Inorganic and Physical Chemistry, Ghent University, Belgium  A gallium 2,2′-bipyridine-5,5′-dicarboxylate, Ga(OH)(bpydc), denoted as COMOC-4 (COMOC = Center for Ordered Materials, Organometallics and Catalysis, Ghent University), has been synthesized via both solvothermal and microwave synthesis procedures. The bipyridine linkers of this open MOF with a MIL-253[1] topology are ideal anchors to graft metal complexes for advanced heterogeneous catalysis. In this work, we use CuCl2 as a model system to create a size selective epoxidation catalyst. It will tether tot he bipyridine linker as shown in Figure 1.  We use cyclohexene, cyclooctene and cyclododecene in the liquid phase as the substrates for the epoxidation and a pure copper bipyridine complex: CuCl2(L1) (L1= dimethyl [2,2'-bipyridine]-5,5'-dicarboxylate) as the benchmark homogeneous catalyst. As the mentioned alkenes have molecular dimensions of 5.0Å, 5.7 Å and 7.6 Å respectively, the pore entrance of our MOF-system has a diameter of ~10.1 Å, diffusion limitations can result in a profound size selectivity. Details of the size selective epoxidation will be unraveled and we will moreover show that the catalyst is highly stable and recyclable.   Figure 1. Representative structure CuCl2 incorporated COMOC-4 framework; a) in view from b axis; b) the channel wall of connected {GaO6} chains, linked through the bpydc2- ligand with CuCl2 at open N sites.  [1]  Bloch, E. D.; Britt, D.; Lee, C.; Doonan, C. J.; Uribe-Romo, F. J.; Furukawa, H.; Long, J. R.; Yaghi, O. M. J. Am. Chem. Soc., 132(2010), 14382.  E-mail:  yingya.liu@ugent.be www: http://www.we06.ugent.be/comoc 

Cu@COMOC-4, a bimetallic metal-organic framework for the size selective epoxidation of cycloalkenes

https://biblio.ugent.be/publication/3165995/file/3166000.pdf

Cu@COMOC-4, a bimetallic metal-organic framework for the size selective epoxidation of cycloalkenes

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Ghent University Academic Bibliography