Reversible single crystal-to-single crystal double [2+2] cycloaddition induces multifunctional photo-mechano-electrochemical properties in framework materials

Dylan A. Sherman, Ryuichi Murase, Samuel G. Duyker, Qinyi Gu, William Lewis, Teng Lu, Yun Liu and Deanna M. D’Alessandro ()
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Dylan A. Sherman: The University of Sydney
Ryuichi Murase: The University of Sydney
Samuel G. Duyker: The University of Sydney
Qinyi Gu: The University of Sydney
William Lewis: The University of Sydney
Teng Lu: The Australian National University
Yun Liu: The Australian National University
Deanna M. D’Alessandro: The University of Sydney

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Reversible structural transformations of porous coordination frameworks in response to external stimuli such as light, electrical potential, guest inclusion or pressure, amongst others, have been the subject of intense interest for applications in sensing, switching and molecular separations. Here we report a coordination framework based on an electroactive tetrathiafulvalene exhibiting a reversible single crystal-to-single crystal double [2 + 2] photocyclisation, leading to profound differences in the electrochemical, optical and mechanical properties of the material upon light irradiation. Electrochemical and in situ spectroelectrochemical measurements, in combination with in situ light-irradiated Raman spectroscopy and atomic force microscopy, revealed the variable mechanical properties of the framework that were supported using Density Functional Theory calculations. The reversible structural transformation points towards a plethora of potential applications for coordination frameworks in photo-mechanical and photoelectrochemical devices, such as light-driven actuators and photo-valves for targeted drug delivery.

Date: 2020
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DOI: 10.1038/s41467-020-15510-7

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