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- W4237577125 abstract "A detailed understanding of the operation and efficiency of unidirectional photomolecular rotary motors is essential for their effective exploitation in molecular nanomachines. Unidirectional motion relies on light-driven conversion from a stable (1 a) to a metastable (1 b) conformation, which then relaxes through a thermally driven helix inversion in the ground state. The excited-state surface has thus far only been experimentally characterised for 1 a. Here we probe the metastable, 1 b, excited state, utilising ultrafast transient absorption and femtosecond stimulated Raman spectroscopy. These reveal that the “dark” excited-state intermediate between 1 a and 1 b has a different lifetime and structure depending on the initial ground-state conformation excited. This suggests that the reaction coordinate connecting 1 a to 1 b differs to that for the reverse photochemical process. The result is contrasted with earlier calculations." @default.
- W4237577125 created "2022-05-12" @default.
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- W4237577125 date "2018-04-27" @default.
- W4237577125 modified "2023-09-23" @default.
- W4237577125 title "Mapping the Excited‐State Potential Energy Surface of a Photomolecular Motor" @default.
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- W4237577125 doi "https://doi.org/10.1002/ange.201802126" @default.
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