UNSPECIFIED (2001) Photoinduction of fast, reversible translational motion in a hydrogen-bonded molecular shuttle. SCIENCE, 291 (5511). pp. 2124-2128. ISSN 0036-8075

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Abstract

A rotaxane is described in which a macrocycle moves reversibly between two hydrogen-bonding stations after a nanosecond Laser pulse. Observation of transient changes in the optical absorption spectrum after photoexcitation allows direct quantitative monitoring of the submolecular translational process. The rate of shuttling was determined and the influence of the surrounding medium was studied: At room temperature in acetonitrile, the photoinduced movement of the macrocycle to the second station takes about 1 microsecond and, after charge recombination (about 100 microseconds), the macrocycle shuttles back to its original position. The process is reversible and cyclable and has properties characteristic of an energy-driven piston.

Item Type:	Journal Article
Subjects:	Q Science
Journal or Publication Title:	SCIENCE
Publisher:	AMER ASSOC ADVANCEMENT SCIENCE
ISSN:	0036-8075
Date:	16 March 2001
Volume:	291
Number:	5511
Number of Pages:	5
Page Range:	pp. 2124-2128
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/12355

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