Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/6556
Título: Cooperative assembly of discrete stacked aggregates driven by supramolecular host-guest complexation
Autor: Basílio, Nuno
Piñeiro, Ángel
Silva, José P. da
García-Río, Luís
Data: 2013
Editora: American Chemical Society
Resumo: p-Sulfonatocalix[4]arene (SC4) interacts with the aromatic dye crystal violet (CV) to form complexes with stoichiometries ranging from SC4:CV = 1:1 up to 1:5 both in solution and in the gas phase. While the 1:1 complex is of the inclusion type, as frequently observed for other guests, in the higher-order complexes the CV molecules interact with SC4 in a peripheral manner. The formation of such complexes is driven by ionic interactions established between the dye and the calixarene and by CV-CV stacking interactions. The application of an advanced fitting procedure made possible a quantitative analysis of the UV-vis data and allowed the determination of the stepwise binding constants. This unprecedented approach provides evidence that the formation of the highest-order complexes occurs through a cooperative mechanism. Moreover, the development of a quantitative analytical model enables the possibility of using this type of system for water-soluble sensing assays, as is also exemplified in the present work. © 2013 American Chemical Society.
Peer review: yes
URI: http://hdl.handle.net/10400.1/6556
DOI: https://dx.doi.org/10.1021/jo401307c
ISSN: 0022-3263
Aparece nas colecções:FCT3-Livros (ou partes, com ou sem arbitragem científica)



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