Angewandte Chemie International Edition

Cover image for Vol. 55 Issue 27

Editor: Peter Gölitz, Deputy Editors: Neville Compton, Haymo Ross

Online ISSN: 1521-3773

Associated Title(s): Angewandte Chemie, Chemistry - A European Journal, Chemistry – An Asian Journal, ChemistryOpen, ChemPlusChem, Zeitschrift für Chemie

Cover Picture: Absolute Asymmetric Photocyclization of a Photochromic Diarylethene Derivative in Single Crystals (Angew. Chem. Int. Ed. 14/2003)

42_14/2003Absolute Asymmetric Photochromism in chiral crystals has enormous potential. The cover picture shows this phenomenon for 1,2-bis(2-methyl-5-(3-formylphenyl)-3-thienyl)perfluorocyclopentene, which has no chiral resources, but forms chiral crystals. Upon UV irradiation the diarylethene unit undergoes the photochromic reaction both in the single crystals and in solution, and each chiral crystal gives one enantiomer. The photocyclization/cycloreversion cycle can be repeated by using UV and visible light alternately. Details of the study are reported by M. Irie et al. on page 1636 ff.

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