Issue 6, 2018

Photochemical investigation of cyanoazobenzene derivatives as components of artificial supramolecular pumps

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

Article information

Article type
Paper
Submitted
09 Feb 2018
Accepted
16 Mar 2018
First published
03 May 2018

Photochem. Photobiol. Sci., 2018,17, 734-740

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, 17, 734 DOI: 10.1039/C8PP00062J

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