Detecting Ni(II) in aqueous solution by3-(2-pyridyl)-[1,2,3]triazolo[1,5-a]pyridine anddimethyl- -cyclodextrin
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A new supramolecular sensitizer for nickel(II) ion in aqueous solution based on a pyridyltriazolopyridine-cyclodextrin inclusion complex is proposed. The inclusion complexation behavior, characterization andbinding ability of pyridyltriazolopyridine (PTP) with dimethyl- -cyclodextrin (DM CD) has been inves-tigated both in solution and solid state by means of absorption, fluorescence,1H NMR, DSC, and molecularmodeling methods. The stoichiometry of the inclusion complex is 1:1, and the thermodynamic studiesindicate that the inclusion of PTP is mainly an entropic driven process. The 2D NMR studies revealed thatthe pyridyl-triazolopyridine is included by both sides of cyclodextrin which are in good agreement withthe docking results. The fluorescence changes upon addition of divalent cations to the inclusion complexindicate a high selectivity and sensitivity for Ni2+by fluorescence quenching in neutral aqueous solution.
Artículo de publicación ISI
Fondecyt 1120142 and to CEPEDEQ from theChemical and Pharmaceutical Science Faculty of the University ofChile for the use of NMR. Ministerio de Ciencia e Innovación (Spain) (Project Consolider-Ingenio Supramed CSD 2010-00065) and to Generalitat Valenciana (Valencia, Spain)(Project PROMETEO 2011/008).
DOI: DOI: 10.1016/j.carbpol.2014.02.043
Quote ItemCarbohydrate Polymers 107 (2014) 124–131