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Science 20 September 1996:
Vol. 273. no. 5282, pp. 1686 - 1688
DOI: 10.1126/science.273.5282.1686
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Reports

Dynamic Control and Amplification of Molecular Chirality by Circular Polarized Light

Nina P. M. Huck, Wolter F. Jager, Ben de Lange, Ben L. Feringa *

The enantiomers of a racemic photoresponsive material represent two distinct states that can be modulated with irradiation at a single wavelength by changing the handedness of the light. Dynamic control over molecular chirality was obtained by the interconversion of enantiomers of helically shaped molecules with either left or right circular polarized light (CPL). Photoresolution of the bistable compound as a dopant in a nematic liquid crystalline phase by CPL irradiation led to a chiral mesoscopic phase. The chiral information inherent to CPL is therefore transmitted to the bistable molecule, followed by amplification and macroscopic expression of the chirality.

Department of Organic and Molecular Inorganic Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, Netherlands.
*   To whom correspondence should be addressed.

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