Intracomplex electron transfer in a hydrogen-bonded calixarene–porphyrin system

Abstract
Photoinduced electron transfer in a non-covalent assembly based on supramolecular contacts between the phenolic hydroxy groups of a calix[4]arene-substituted ZnII metalloporphyrin photodonor and the carbonyl groups of a benzoquinone acceptor (Ka= 40 ± 3.6 dm3 mol–1) in CDCl3 occurs with a rate constant of (8.0 ± 0.2)× 108 s–1.