Visible-Light-Driven "on"/"Off" Photochromism of a Polyoxometalate Diarylethene Coordination Complex

Xu, J, Volfova, H, Mulder, R, Goerigk, L, Bryant, G, Riedle, E and Ritchie, C 2018, 'Visible-Light-Driven "on"/"Off" Photochromism of a Polyoxometalate Diarylethene Coordination Complex', Journal of the American Chemical Society, vol. 140, no. 33, pp. 10482-10487.

Document type: Journal Article
Collection: Journal Articles

Title Visible-Light-Driven "on"/"Off" Photochromism of a Polyoxometalate Diarylethene Coordination Complex
Author(s) Xu, J
Volfova, H
Mulder, R
Goerigk, L
Bryant, G
Riedle, E
Ritchie, C
Year 2018
Journal name Journal of the American Chemical Society
Volume number 140
Issue number 33
Start page 10482
End page 10487
Total pages 6
Publisher American Chemical Society
Abstract Herein we report the first photochromic polyoxometalate (POM)-based diarylethene (DAE) coordination complex, prepared by ligation of two cobalt(III)-incorporated borotungstates [BIIIWVI 11O39CoIII]6- with the ditopic pyridyl-containing diarylethene (C25H16N2F6S2). The solution-state composition, structure, and stability of the assembly were probed using 1H and 19F nuclear magnetic resonance spectroscopy (NMR), electrospray ionization quadrupolar time-of-flight mass spectrometry (ESI-QTOF-MS), ultraviolet-visible spectroscopy (UV-vis), and small-angle X-ray scattering (SAXS), revealing that the complex self-organizes to adopt a molecular dumbbell structure due to electrostatic and steric considerations. This conformation is a prerequisite for the photocyclization reaction. The assembly was found to be switchable between two states using visible light due to the perturbation of the DAE electronic structure on coordination to the POM. We present photophysical data, including the reaction quantum efficiency of the molecular switch in both directions measured using a custom-built quantum yield determination setup in addition to fatigue resistance on prolonged irradiation.
Subject Soft Condensed Matter
Transition Metal Chemistry
Nanoscale Characterisation
Copyright notice © 2018 American Chemical Society
ISSN 0002-7863
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