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Research Highlight

Rotational Dynamics of an Amphidynamic Zirconium MOF Determined by Dielectric Spectroscopy

Scientific Achievement

The non-Debye relaxation behavior of amphidynamic zirconium MOF is identified by broadband dielectric spectroscopy and a low barrier is found despite rotator-framework interactions.

Significance and Impact

The work provides an approach for analyzing complicated dynamics of dipolar rotor arrays in a porous framework and paves the way for future design of dielectric materials.

Research Details

– The dynamics of dipolar rotator arrays in amphidynamic MOF crystals are determined by broadband dielectric spectroscopy
– Analysis reveals fast rotational dynamics and low activation barrier of 2,3-difluorophenylene rotator linked by triple bonds
– Hydrogen-bonds between rotor and framework give rise to dynamic heterogeneity
 

Zhiyu Liu, Yangyang Wang, and M. A. Garcia-Garibay, "Rotational Dynamics of an Amphidynamic Zirconium Metal-Organic Framework Determined by Dielectric Spectroscopy," J. Phys. Chem. Lett. 12, 5644-5648 (2021).  DOI: 10.1021/acs.jpclett.1c01333