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Article Dans Une Revue Nature Communications Année : 2022

Towards the engineering of a photon-only two-stroke rotary molecular motor

Résumé

The rational engineering of photoresponsive materials, e.g., light-driven molecular motors, is a challenging task. Here, we use structure-related design rules to prepare a prototype molecular rotary motor capable of completing an entire revolution using, exclusively, the sequential absorption of two photons; i.e., a photon-only two-stroke motor. The mechanism of rotation is then characterised using a combination of non-adiabatic dynamics simulations and transient absorption spectroscopy measurements. The results show that the rotor moiety rotates axially relative to the stator and produces, within a few picoseconds at ambient T, an intermediate with the same helicity as the starting structure. We discuss how such properties, that include a 0.25 quantum efficiency, can help overcome the operational limitations of the classical overcrowded alkene designs.
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hal-03834058 , version 1 (28-10-2022)

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Michael Filatov, Marco Paolino, Robin Pierron, Andrea Cappelli, Gianluca Giorgi, et al.. Towards the engineering of a photon-only two-stroke rotary molecular motor. Nature Communications, 2022, 13, pp.6433. ⟨10.1038/s41467-022-33695-x⟩. ⟨hal-03834058⟩
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