Reference : Kinetic and energetic insights into the dissipative non-equilibrium operation of an a...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
Physics and Materials Science
http://hdl.handle.net/10993/51508
Kinetic and energetic insights into the dissipative non-equilibrium operation of an autonomous light-powered supramolecular pump
English
Corra, Stefano [> >]
Baki, Marina Tranfi [> >]
Groppi, Jessica [> >]
Baroncini, Massimo [> >]
Silvi, Serena [> >]
Penocchio, Emanuele mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Esposito, Massimiliano mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Credi, Alberto [> >]
2022
Nature Nanotechnology
Yes
International
1748-3395
[en] Natural and artificial autonomous molecular machines operate by constantly dissipating energy coming from an external source to maintain a non-equilibrium state. Quantitative thermodynamic characterization of these dissipative states is highly challenging as they exist only as long as energy is provided. Here we report on the detailed physicochemical characterization of the dissipative operation of a supramolecular pump. The pump transduces light energy into chemical energy by bringing self-assembly reactions to non-equilibrium steady states. The composition of the system under light irradiation was followed in real time by 1H NMR for four different irradiation intensities. The experimental composition and photon flow were then fed into a theoretical model describing the non-equilibrium dissipation and the energy storage at the steady state. We quantitatively probed the relationship between the light energy input and the deviation of the dissipative state from thermodynamic equilibrium in this artificial system. Our results provide a testing ground for newly developed theoretical models for photoactivated artificial molecular machines operating away from thermodynamic equilibrium.
European Research Council
http://hdl.handle.net/10993/51508
10.1038/s41565-022-01151-y
https://doi.org/10.1038/s41565-022-01151-y
H2020 ; 692981 - LEAPS - Light effected autonomous molecular pumps: Towards active transporters and actuating materials

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