Open AccessTuning the Mechanical Response of Metal–Organic Frameworks by Defect Engineering
Author(s) -
Stefano Dissegna,
Pia Vervoorts,
Claire L. Hobday,
Tina Düren,
Dominik Daisenberger,
Andrew J. Smith,
Roland A. Fischer,
Gregor Kieslich
Publication year - 2018
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/jacs.8b07098
Subject(s) - chemistry , bulk modulus , hydrostatic pressure , metal organic framework , diffraction , melting point , hydrostatic equilibrium , moduli , crystallographic defect , metal , high pressure , modulus , nanotechnology , chemical physics , chemical engineering , crystallography , composite material , thermodynamics , materials science , organic chemistry , physics , adsorption , quantum mechanics , optics , engineering
The incorporation of defects into crystalline materials provides an important tool to fine-tune properties throughout various fields of materials science. We performed high-pressure powder X-ray diffraction experiments, varying pressures from ambient to 0.4 GPa in 0.025 GPa increments to probe the response of defective UiO-66 to hydrostatic pressure for the first time. We observe an onset of amorphization in defective UiO-66 samples around 0.2 GPa and decreasing bulk modulus as a function of defects. Intriguingly, the observed bulk moduli of defective UiO-66(Zr) samples do not correlate with defect concentration, highlighting the complexity of how defects are spatially incorporated into the framework. Our results demonstrate the large impact of point defects on the structural stability of metal-organic frameworks (MOFs) and pave the way for experiment-guided computational studies on defect engineered MOFs.
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