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Fumitaka Terao, Dr. Masakazu Morimoto and Prof. Dr. Masahiro Irie Inside Cover: Light-Driven Molecular-Crystal Actuators: Rapid and Reversible Bending of Rodlike Mixed Crystals of Diarylethene Derivatives (Angew. Chem. Int. Ed. 4/2012) Angewandte Chemie International Edition 51

Version of Record online: 15 NOV 2011 | DOI: 10.1002/anie.201107570

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Light-driven actuators can be potentially used in various micro- and nanomechanical applications. In their Communication on page 901 ff., M. Irie and co-workers describe the preparation of robust molecular-crystal actuators with interesting mechanical properties. Two-component mixed crystals of photochromic diaryl ethenes exhibit rapid, reversible, and fatigue-resistant bending upon photoirradiation and carry out mechanical work, such as lifting weights and rotating gears.

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