http://www.cnr.it/ontology/cnr/individuo/prodotto/ID39695

Counterion-Dependent Proton-Driven Self-Assembly of Linear Supramolecular Oligomers Based on Amino-Calix[5]arene Building Blocks (Articolo in rivista)

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Counterion-Dependent Proton-Driven Self-Assembly of Linear Supramolecular Oligomers Based on Amino-Calix[5]arene Building Blocks (Articolo in rivista) (literal)

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Alternative label

Sebastiano Pappalardo; Valentina Villari; Sarit Slovak; Yoram Cohen; Giuseppe Gattuso; Anna Notti; Andrea Pappalardo; Ilenia Pisagatti; Melchiorre F. Parisi (2007)
Counterion-Dependent Proton-Driven Self-Assembly of Linear Supramolecular Oligomers Based on Amino-Calix[5]arene Building Blocks
in Chemistry (Weinh., Print); Wiley-VCH Verlag Gmbh, Weinheim (Germania)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Sebastiano Pappalardo; Valentina Villari; Sarit Slovak; Yoram Cohen; Giuseppe Gattuso; Anna Notti; Andrea Pappalardo; Ilenia Pisagatti; Melchiorre F. Parisi (literal)

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Note

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Dipartimento di Scienze Chimiche, Università di Catania Viale A. Doria 6, 95125 Catania (Italy) CNR-Istituto per i Processi Chimico-Fisici Via La Farina 237, 98100 Messina (Italy) School of Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv, University Ramat Aviv 69978, Tel Aviv (Israel) Dipartimento di Chimica Organica e Biologica, Università di Messina Salita Sperone 31, 98166 Messina (Italy) (literal)

Titolo

Counterion-Dependent Proton-Driven Self-Assembly of Linear Supramolecular Oligomers Based on Amino-Calix[5]arene Building Blocks (literal)

Abstract

Self-assembly of a calix[5]arene bearing a 12-aminododecyl pendant group on the lower rim into supramolecular oligomers through intermolecular iterative inclusion events is readily triggered by contact with acid solutions and is reversed to the amino monomer precursor by treatment with a base. 1H NMR data are consistent with the formation of head-to-tail assemblies derived from endo-cavity inclusion of the alkylammonium moiety. Diffusion NMR and light-scattering studies provide evidence for the presence of oligomers in solution and show that different counterions and concentrations result in different oligomer sizes, whereas ESI-MS and SEM investigations, respectively, indicate that self-assembly also takes place in the gas phase and in the solid state. The growth of these supramolecular oligomers is concentration-dependent; however, as a consequence of the saline nature of the monomer, it also shows a distinct counterion-dependence owing to ion-pairing/solvation effects. (literal)

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