Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 14, Pages 5730-5737Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201913798
Keywords
hemithioindigo; isomerization; molecular machines; photochemistry; physical chemistry
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Funding
- Fonds der Chemischen Industrie [Li 188/05]
- Deutsche Forschungsgemeinschaft (DFG) [DU 1414/1-1]
- Deutsche Forschungsgemeinschaft [SFB 749]
- Cluster of Excellence Center for Integrated Protein Science Munich (CIPSM)
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Light-driven molecular motors possess immense potential as central driving units for future nanotechnology. Integration into larger molecular setups and transduction of their mechanical motions represents the current frontier of research. Herein we report on an integrated molecular machine setup allowing the transmission of potential energy from a motor unit onto a remote receiving entity. The setup consists of a motor unit connected covalently to a distant and sterically encumbered biaryl receiver. By action of the motor unit, single-bond rotation of the receiver is strongly accelerated and forced to proceed unidirectionally. The transmitted potential energy is directly measured as the extent to which energy degeneration is lifted in the thermal atropisomerization of this biaryl. Energy degeneracy is reduced by more than 1.5 kcal mol(-1), and rate accelerations of several orders of magnitude in terms of the rate constants are achieved.
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