Conferences - Seminars

  Monday 14 May 2018 13:15 - 14:15 MXF 1

Out-of-equilibrium Integration of Molecular Machines

By Prof. Nicolas Giuseppone, University of Strasbourg France

Abstract: Making molecular machines that can be useful in the macroscopic world is a challenging long-term goal of nanoscience. Inspired by the protein machinery found in biological systems, and based on the theoretical understanding of the physics of motion at the nanoscale, organic chemists have developed a number of molecules that can produce work when triggered by various external chemical or physical stimuli. In particular, basic molecular switches that commute between at least two thermodynamic minima and more advanced molecular motors that behave as dissipative units working far from equilibrium when fueled with external energy have been reported. However, the ultimate challenge of coordinating individual molecular motors in a continuous mechanical process that can have a measurable effect at the macroscale has remained elusive until very recently. We will discuss advances developed by our group on artificial molecular machines and involving their mechanical coupling within dynamic polymer systems. We will show that it is now possible to amplify their individual motions to achieve macroscopic functions in materials. In particular, we will present a dual-light controlled system operating fully out-of-equilibrium, and in which the integrated motions of two types of mechanically active units can be tuned by modulation of frequencies.
Selected references:
[1]   G. Du, E. Moulin, N. Jouault, E. Buhler, N. Giuseppone
Angew. Chem. Int. Ed. 2012, 51, 12504.
[2]   Goujon, A., Du, G., Moulin, E., Fuks, G., Maaloum, M., Buhler, E., Giuseppone, N.
Angew. Chem. Int. Ed.  2016, 55, 703.
[3]   Goujon, A., Mariani, G., Lang, T., Moulin, E., Rawiso, M., Buhler, E., Giuseppone, N.
J. Am. Chem. Soc. 2017, 139, 4923.
[4]   Goujon, A., Lang, T., Mariani, G., Moulin, E., Fuks, G., Raya, J., Buhler, E., Giuseppone, N.
J. Am. Chem. Soc. 2017, 139, 14825.
[5]   Li, Q., Fuks, G., Moulin, E., Maaloum, M., Rawiso, M., Kulic, I., Foy, J. T., Giuseppone, N.
Nature Nanotech. 2015, 10, 161.
[6]   Foy, J., Li, Q., Goujon, A., Colard-Otté, J.-R., Fuks, G., Moulin, E., Schiffmann, O., Dattler, D., Funeriu, D. P., Giuseppone, N.
Nature Nanotech. 2017, 12, 540.

Bio: Prof. Nicolas Giuseppone is director of the Research Federation on Materials and Nanoscience of Strasbourg. He received his PhD in asymmetric catalysis (laboratory of Prof. H.B. Kagan), performed a post-doctoral research in total synthesis (laboratory of Prof. K.C. Nicolaou), and entered the field of supramolecular chemistry as a CNRS researcher (laboratory of Prof. J.-M. Lehn). In 2008 he started his own research group, and was awarded an ERC Starting Grant from the European Research Council in 2010. In 2013 he was nominated as a junior member of the Institut Universitaire de France (IUF), and promoted Distinguished Professor at the University of Strasbourg in 2016.
His research interests are focused on supramolecular chemistry, molecular machines and functional materials.

Organization Esther Amstad & Vaso Tileli

Contact Esther Amstad & Vaso Tileli

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