Jean-Claude Bunzli - Isolated d-f pairs in supramolecular complexes with tunable structural and electronic properties

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  Publication Details (including relevant citation   information):

  Piguet,C., Edder,C., Rigault,S., Bernardinelli,G., Bunzli,J.C.G.,   Hopfgartner,G. Journal of the Chemical Society-Dalton   Transactions 2000 (22) 3999-4006

  Abstract: The use of predisposed segmental   ligands in multi-component self-assembly processes allows the   preparation of triple-helical heterodimetallic d-f complexes in   which each pair of metal ions is isolated and protected from   external interactions. The selection of the programmed   heterodimetallic edifice within the 'dynamic virtual library'   arising from the mixture of the reacting components relies on a   judicious matching between the stereochemical preferences of the   metal ions and the binding abilities of the receptors combined   with a reliable characterisation of the thermodynamic equilibria   controlling the assembly process. Minor modifications of the   receptors (donor groups, peripheral substituents) have   considerable effects on formation of heterodimetallic d-f   complexes (HHH)-[LnM(L)(3)]   {L=bis[1-methyl-2-(2-pyridyl)benzimidazol-5-yl]methane   derivative} thus leading to successive improvements of the   stability in aqueous solvent and to the fine tuning of structural   and electronic properties. The implementation of specific   light-converting properties, thermochromism, switchable magnetism   and tunable dynamic behaviour are discussed together with the   development of new paramagnetic NMR techniques for characterising   lanthanide-containing dimetallic architectures in solution

  Address (URL): WOS:000165330600001