6533b870fe1ef96bd12cf16b
RESEARCH PRODUCT
Detecting ni(ii) in aqueous solution by 3-(2-pyridyl)-[1,2,3]triazolo[1,5-a]pyridine and dimethyl-beta-cyclodextrin
P. Salgado-figueroaCarolina JullianRosa AdamMax Rojas-aranguizSamuel Fernández-sandovalHoracio Gómez-machucaGerald Zapata-torresCristian Celis-barrosBelén Abarcasubject
Models MolecularPolymers and PlasticsPyridinesSupramolecular chemistryAnalytical chemistryMolecular ConformationDivalentchemistry.chemical_compoundNickelPyridineMaterials Chemistrychemistry.chemical_classificationAqueous solutionCyclodextrinChemistryOrganic Chemistrybeta-CyclodextrinsWaterTriazolesSolutionsProton NMRPhysical chemistrySelectivityTwo-dimensional nuclear magnetic resonance spectroscopyWater Pollutants ChemicalEnvironmental Monitoringdescription
Abstract 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 and binding ability of pyridyltriazolopyridine (PTP) with dimethyl-β-cyclodextrin (DMβCD) has been investigated both in solution and solid state by means of absorption, fluorescence, 1H NMR, DSC, and molecular modeling methods. The stoichiometry of the inclusion complex is 1:1, and the thermodynamic studies indicate that the inclusion of PTP is mainly an entropic driven process. The 2D NMR studies revealed that the pyridyl-triazolopyridine is included by both sides of cyclodextrin which are in good agreement with the docking results. The fluorescence changes upon addition of divalent cations to the inclusion complex indicate a high selectivity and sensitivity for Ni2+ by fluorescence quenching in neutral aqueous solution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-11-29 |