Molecular tectonics: from crystals to crystals of crystals
Résumé
Three new organic tectons (2-4) based on the p-tert-butylthiacalix[4]arene backbone, blocked in the 1,3alternate conformation, bearing four pyridyl coordinating moieties, have been synthesised and characterised in the solid state. The ligands are positional isomers and differ by the position of the N atom on the pyridyl unit (ortho for 2, meta for 3 and para for 4). Their combination with Ag + cation leads, reproducibly, to the formation of 2-and 3-D infinite silver coordination networks. Independent of the nature of the anion, the combination of 2 offering four (N,S) type chelate with Ag + cation affords an unprecedented diamond type 3D network. Both 3 and 4, behaving as tetrakis monodentate ligands, lead to the formation of 2-D architectures.
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