Light-Driven Machine Prototypes Based on Dissociative Excited States: Photoinduced Decoordination and Thermal Recoordination of a Ring in a Ruthenium(II)-Containing [2]Catenane

Authors

  • Pierre Mobian Dr.,

    1. Laboratoire de Chimie Organo-Minérale, UMR CNRS no. 7513, Faculté de chimie Institut Le Bel, Université Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg Cedex, France, Fax: (+33) 390-241-368
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  • Jean-Marc Kern Prof.,

    1. Laboratoire de Chimie Organo-Minérale, UMR CNRS no. 7513, Faculté de chimie Institut Le Bel, Université Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg Cedex, France, Fax: (+33) 390-241-368
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  • Jean-Pierre Sauvage Prof.

    1. Laboratoire de Chimie Organo-Minérale, UMR CNRS no. 7513, Faculté de chimie Institut Le Bel, Université Louis Pasteur, 4, rue Blaise Pascal, 67070 Strasbourg Cedex, France, Fax: (+33) 390-241-368
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  • We thank the Ministry of Education for a fellowship to P.M., and the CNRS and the European Commission for financial support.

Abstract

original image

A marked difference is observed in the photochemistry of [2]catenanes containing a complexed ruthenium(II) center. The photochemical reactions result in a decoordination process and large amplitude motions through the formation of a strongly dissociative ligand-field excited state (see example, L=CH3CN or Cl), with the rate dependent on the ring size. The back reaction is performed thermally.

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