Crystal Growth and Design p. 5492 - 5500 (2018)
Update date:2022-08-17
Topics:
Drache, Franziska
Cirujano, Francisco G.
Nguyen, Khoa D.
Bon, Volodymyr
Senkovska, Irena
Llabrés I Xamena, Francesc X.
Kaskel, Stefan
A postsynthetic treatment with diluted solutions of the inorganic HCl or H2SO4 acids was applied to functionalize the eight connected Zr-based metal-organic framework DUT-67 (DUT = Dresden University of Technology). During the treatment, it is possible to remove and exchange the pristine modulator (formate) by Cl- or SO42- anions. The position of the chlorine in the crystal structure of DUT-67 after HCl treatment could be determined by single-crystal X-ray diffraction analysis. Moreover, by means of the acidic treatment the polarity of the network as well as its Br?nsted acid strength are increased, which have a crucial impact on the catalytic performance. The improved catalytic activity of the acid-treated materials was demonstrated in the esterification of levulinic acid with ethanol.
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