ArticleJournal of the American Chemical Society2023
Control of Photoconversion Yield in Unidirectional Photomolecular Motors by Push-Pull Substituents.
Article in Journal of the American Chemical Society, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Towards helical-chirality-controlled molecular motors.Chemical science · 2026Article
- Solvent-Dependent Ultrafast Photochemical Dynamics ofThe journal of physical chemistry. A · 2025Article
- Unidirectional molecular rotary motor with remotely switchable rotation direction.Science advances · 2025Article
- Excited State Dynamics in Unidirectional Photochemical Molecular Motors.Journal of the American Chemical Society · 2024Review
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Molecular motors based on the overcrowded alkene motif convert light energy into unidirectional mechanical motion through an excited state isomerization reaction. The realization of experimental control over conversion efficiency in these molecular motors is an important goal. Here, we combine the synthesis of a novel "push-pull" overcrowded alkene motor with photophysical characterization by steady state and ultrafast time-resolved electronic spectroscopy. We show that tuning of the charge transfer character in the excited state has a dramatic effect on the photoisomerization yield, enhancing it to near unity in nonpolar solvents while largely suppressing it in polar solvents. This behavior is explained through reference to solvent- and substituent-dependent potential energy surfaces and their effect on conical intersections to the ground state. These observations offer new routes to the fine control of motor efficiency and introduce additional degrees of freedom in the synthesis and exploitation of light-driven molecular motors.
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Registered trials
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