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Photochemical investigation of cyanoazobenzene derivatives as components of artificial supramolecular pumps

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Abstract

Among the plethora of photochromes reported so far, azobenzene has been proven to be the most suitable photoswitch for molecular systems and materials, due to its highly efficient and clean EZ photoisomerization. Here we report two ammonium-based molecular axles bearing one or two p-cyanoazobenzene units at the extremities, able to form pseudorotaxanes with a crown ether macrocycle. The photochemistry of these compounds was studied in the isolated forms and in the pseudorotaxanes, showing that the functionalization speeds up the threading process without affecting the photochemical properties of the system. These results suggest that the investigated pseudorotaxanes can form the basis of new prototypes of artificial molecular-level pumps.

Graphical abstract: Photochemical investigation of cyanoazobenzene derivatives as components of artificial supramolecular pumps

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Publication details

The article was received on 09 Feb 2018, accepted on 16 Mar 2018 and first published on 03 May 2018


Article type: Paper
DOI: 10.1039/C8PP00062J
Citation: Photochem. Photobiol. Sci., 2018, Advance Article
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    Photochemical investigation of cyanoazobenzene derivatives as components of artificial supramolecular pumps

    L. Casimiro, J. Groppi, M. Baroncini, M. La Rosa, A. Credi and S. Silvi, Photochem. Photobiol. Sci., 2018, Advance Article , DOI: 10.1039/C8PP00062J

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