Angewandte Chemie International Edition
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Cover Picture: Angew. Chem. Int. Ed. 4/2003
Flexible and dynamic channels created by an interdigitated framework of microporous coordination polymers are shown on the cover picture. The compound undergoes reversible crystal-to-crystal transformation from a nonporous (closed-form) to a microporous (open-form) structure, which is triggered by adsorption of supercritical gases. A hysteretic isotherm, shown bottom left, displays abrupt adsorption at a gate-opening pressure and equally sharp desorption at a gate-closing pressure. More about this coordination polymer is reported in the Communication by S. Kitagawa et al. on page 428 ff.