Angewandte Chemie International Edition

Cover image for Vol. 53 Issue 32

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, Zeitschrift für Chemie

Cover Picture (Angew. Chem. Int. Ed. Engl. 22/1997)

36_22/1997The cover picture shows a stick model of an aggregated calix[4]arenoporphyrin derived from crystal-structrue coordinates (oxygen atoms of one molecule are represented in red, and nickel atoms as glass balls; the second molecule is depicted by fainter sticks). Aggregations of two molecules to give a cogwheel arragement is clearly a dominant structural phenomenon. Combination of calix[4]arenes, which posses strong ion-bonding properties, with porphyrins, which are pH-dependent photoactive chromophores, can potentially lead to new molecular receptors for the development of efficent sensors. Calix[4]arenoporphyrins may also serve as potential models for biological systems such as the tetrapyrrole units in the light-harvesting component of bacterial LH2. More about this suprmolecular array is reported by K. M. Smith and co-workers on pages 2497–2500. The graphic was generated by Philippe Schmitt, University of Oxford, UK, with the programs POV-Ray 3.0 and POV-Chem.

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