Evidence for a chemical clock in oscillatory formation of UiO-66

M. G. Goesten (), M. F. de Lange, A. I. Olivos-Suarez, A. V. Bavykina, P. Serra-Crespo, C. Krywka, F. M. Bickelhaupt, F. Kapteijn and Jorge Gascon ()
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M. G. Goesten: Catalysis Engineering, Delft University of Technology
M. F. de Lange: Catalysis Engineering, Delft University of Technology
A. I. Olivos-Suarez: Catalysis Engineering, Delft University of Technology
A. V. Bavykina: Catalysis Engineering, Delft University of Technology
P. Serra-Crespo: Radiation Science and Technology
C. Krywka: National Synchrotron Light Source, Brookhaven National Laboratory
F. M. Bickelhaupt: VU University
F. Kapteijn: Catalysis Engineering, Delft University of Technology
Jorge Gascon: Catalysis Engineering, Delft University of Technology

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Chemical clocks are often used as exciting classroom experiments, where an induction time is followed by rapidly changing colours that expose oscillating concentration patterns. This type of reaction belongs to a class of nonlinear chemical kinetics also linked to chaos, wave propagation and Turing patterns. Despite its vastness in occurrence and applicability, the clock reaction is only well understood for liquid-state processes. Here we report a chemical clock reaction, in which a solidifying entity, metal–organic framework UiO-66, displays oscillations in crystal dimension and number, as shown by X-ray scattering. In rationalizing this result, we introduce a computational approach, the metal–organic molecular orbital methodology, to pinpoint interaction between the tectonic building blocks that construct the metal–organic framework material. In this way, we show that hydrochloric acid plays the role of autocatalyst, bridging separate processes of condensation and crystallization.

Date: 2016
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DOI: 10.1038/ncomms11832

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