Applications of Pair Distribution Function Analyses to the Emerging Field of Non-Ideal Metal-Organic Framework Materials
Pair Distribution Function, PDF, analyses are emerging as a powerful tool to characterize non-ideal metal-organic framework (MOF) materials with compromised ordering. Altough originally envisaged as crystalline porous architectures, MOFs can incoporate defects in their structures either through chemistry or mechanical stress, resulting in materials with unpredicted novel properties. Indeed, a wide variety of current non-ideal MOFs have disorder in their structures at some extent, thereby often lacking of crystals. Typically, PDF experiments are performed using high-energy synchrotron X-rays or neutrons to achieve a superior highly atomic resolution in short times. The PDF technique analyses both Bragg and diffuse scattering signals, simultaneously, without being restricted to crystalline materials. This characeristic make PDF analyses a powerful probe to address the structural characterization of non-ideal MOF materials both at the local and intermediate range scales, including under in-situ conditions relevant for MOF synthesis, activation and catalysis.
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