A Hafnium-Based Metal–Organic Framework as an Efficient and Multifunctional Catalyst for Facile CO2 Fixation and Regioselective and Enantioretentive Epoxide Activation
Journal of the American Chemical Society2014Vol. 136(45), pp. 15861–15864
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M. Hassan Beyzavi, Rachel C. Klet, Samat Tussupbayev, Joshua Borycz, Nicolaas A. Vermeulen, Christopher J. Cramer, J. Fraser Stoddart, Joseph T. Hupp, Omar K. Farha
Abstract
Porous heterogeneous catalysts play a pivotal role in the chemical industry. Herein a new Hf-based metal–organic framework (Hf-NU-1000) incorporating Hf6 clusters is reported. It demonstrates high catalytic efficiency for the activation of epoxides, facilitating the quantitative chemical fixation of CO2 into five-membered cyclic carbonates under ambient conditions, rendering this material an excellent catalyst. As a multifunctional catalyst, Hf-NU-1000 is also efficient for other epoxide activations, leading to the regioselective and enantioretentive formation of 1,2-bifuctionalized systems via solvolytic nucleophilic ring opening.
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