Abstract
Dynamic chemical devices based on a terpyridine scaffold and two appended porphyrin moieties have been synthesized. In their Full Paper on page 1931 ff., T. S. Balaban, J. D. Durrant, J.‐M. Lehn et al. describe how these “butterfly‐type” devices are capable of switching from an extended open geometry W to a compact closed geometry U upon cation coordination to the terpy unit. The porphyrin moieties exist in the constructs either as free bases or they can be sequentially metallated, thus giving rise to wings of different “colors”.
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