Search results for "Trivalent cations"

showing 2 items of 2 documents

5,5′-Bis-vanillin derivatives as discriminating sensors for trivalent cations

2015

[EN] Several bis-vanillin derivatives containing semicarbazone moieties have been prepared and used in discriminating trivalent cations. The prepared probes are readily obtained and they are usually highly crystalline. Depending on the ligand and the studied cations, quenching, enhancement or no changes in the fluorescence spectrum were observed. Using a series of the prepared ligands allows distinguishing between Fe3+, Cr3+ and Al3+. Detection limits and selectivity in front of divalent cations have been evaluated. (C) 2015 Elsevier Ltd. All rights reserved.

SemicarbazoneBIS-VAINILLINVanillinOrganic ChemistryInorganic chemistryCiencias QuímicasTrivalent cationsChemosensorBiochemistryFluorescencechemistry.chemical_compoundQuímica OrgánicachemistrySensingDrug DiscoveryOrganic chemistryBis-vanillinSemicarbazoneCIENCIAS NATURALES Y EXACTASTetrahedron Letters
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A chalcone-based highly selective and sensitive chromofluorogenic probe for trivalent metal cations

2015

[EN] Anew chalcone-based probe for the chromofluorogenic sens-ing of trivalent (Al3 +,Fe3+,Cr3+,Ga3+,In3+and As3 +)overmono-and divalent cationsand anionsisreported. In the presence of trivalent metal cations,the probe was able to displayaremarkable color change from yellow to colorless that wasclearly visible to the naked eye. Also, the initial strongyellowemission was gradually quenched and substituted by aweaklyshifted band.

chemistry.chemical_classificationChalconeQUIMICA INORGANICAGeneral ChemistryHighly selectivePhotochemistrysensorstrivalent cationsDivalentchalcone-based probeMetalchemistry.chemical_compoundchromofluorogenic sensingQUIMICA ORGANICAchemistryvisual_artQUIMICA ANALITICAvisual_art.visual_art_mediumNaked eyeanions
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