Abstract
Herein, the desolvation, dehydroxylation and rehydroxylation of the metal organic frameworks UiO-66 and -67 are followed by in situ DRIFTS and TG–DSC. The spectra recorded on UiO-66 feature multiple bands corresponding to chemically inequivalent isolated hydroxyl groups, whereas UiO-67 has the expected single μ3-OH band from the Zr6O4(OH)4 cornerstone. Complete rehydration is demonstrated on both materials. Based on further experimental insights, hypotheses are given to explain the observed differences between UiO-66 and -67. Quantum chemical calculations are employed in order to deduce the feasibility of one possible explanation for the observed behaviour on UiO-66.
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Thanks are due to the Research Council of Norway for grant of computer time through the NOTUR project) account NN4683K). This publication forms a part of the inGAP Center of Research-based innovation, which receives financial support from the Research Council of Norway under Contract 174893.
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Shearer, G.C., Forselv, S., Chavan, S. et al. In Situ Infrared Spectroscopic and Gravimetric Characterisation of the Solvent Removal and Dehydroxylation of the Metal Organic Frameworks UiO-66 and UiO-67. Top Catal 56, 770–782 (2013). https://doi.org/10.1007/s11244-013-0027-0
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DOI: https://doi.org/10.1007/s11244-013-0027-0