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Autonomous artificial nanomotor powered by sunlight.

Imported: 05 May '16 | Published: 25 Jan '06

Vincenzo V Balzani, Miguel M Clemente-León, Alberto A Credi, Belén B Ferrer, Margherita M Venturi, Amar H AH Flood, J Fraser JF Stoddart

PNAS

Abstract: Light excitation powers the reversible shuttling movement of the ring component of a rotaxane between two stations located at a 1.3-nm distance on its dumbbell-shaped component. The photoinduced shuttling movement, which occurs in solution, is based on a "four-stroke" synchronized sequence of electronic and nuclear processes. At room temperature the deactivation time of the high-energy charge-transfer state obtained by light excitation is approximately 10 micros, and the time period required for the ring-displacement process is on the order of 100 micros. The rotaxane behaves as an autonomous linear motor and operates with a quantum efficiency up to... Read More

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