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Elucidating the Structure of the Metal-Organic Framework Ru-HKUST-1



Gregory R. Lorzing, Krista P. Balto, Alexandra M. Antonio, Benjamin Trump, Craig Brown, Eric D. Bloch


Ru-HKUST-1 (Ru3(btc)2X1.5; btc3– = 1,3,5-benzentricarboxylate; X^ = chloride, acetate, trimesate) has received considerable attention as a result of its structure type, tunability, and the redox-active nature of its constituent metal paddlewheel building units. As compared to some of the other members of the HKUST-1 family, its surface area is typically reported as 25% lower than expected. In contrast to this, a related ruthenium-based porous coordination cage, Ru24(tBu-bdc)24Cl12, displays the expected surface area when compared to Cr2+ and Mo2+ analogs. Here, we examine the factors that result in this decreased surface area for the MOF. We show that with appropriate solvent exchange and activation conditions, Ru-HKUST-1 can display a B.E.T. surface ar-eas as high as 1439 m2/g. We utilize a combination of spectroscopic and diffraction techniques to accurately determine the structure of the MOF prepared under our conditions, which is most accurately described here as Ru3(btc)2(OAc)1.07Cl0.43. Further, by simply treating the sample as air-sensitive upon isolation, adsorption selec-tivities toward unsaturated molecules greatly improve.
Chemistry of Materials


Metal Organic Framework, Gas Adsorption


Lorzing, G. , Balto, K. , Antonio, A. , Trump, B. , Brown, C. and Bloch, E. (2020), Elucidating the Structure of the Metal-Organic Framework Ru-HKUST-1, Chemistry of Materials (Accessed May 26, 2024)


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Created September 21, 2020, Updated September 2, 2021