Highly sensitive detection of cobalt through fluorescence changes in β-cyclodextrin-bimane complexes

A supramolecular complex of syn -(methyl,methyl)bimane ( 1 ) and β-cyclodextrin demonstrates a sensitive (limit of detection = 0.60 nM) and selective fluorescence turn-off response in the presence of cobalt in aqueous media, with calibration curves enabling quantitation in solution and using filter...

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Published inChemical communications (Cambridge, England) Vol. 56; no. 81; pp. 12126 - 12129
Main Authors Pramanik, Apurba, Amer, Sara, Grynszpan, Flavio, Levine, Mindy
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 13.10.2020
Subjects
Aqueous solutions
beta-Cyclodextrins - chemistry
Bridged Bicyclo Compounds, Heterocyclic - chemistry
Cobalt
Cobalt - analysis
Cyclodextrins
Fluorescence
Ion detectors
Molecular Structure
NMR spectroscopy
Proton Magnetic Resonance Spectroscopy
Spectrum analysis
Titration
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Summary:A supramolecular complex of syn -(methyl,methyl)bimane ( 1 ) and β-cyclodextrin demonstrates a sensitive (limit of detection = 0.60 nM) and selective fluorescence turn-off response in the presence of cobalt in aqueous media, with calibration curves enabling quantitation in solution and using filter papers on which bimane and cyclodextrin were adsorbed. 1 H NMR spectroscopy provides insight into interactions underlying the sensor performance. Cobalt detection is accomplished via efficient fluorescence quenching of a bimane-β-cyclodextrin complex, both in solution and in the solid state.
Bibliography:10.1039/d0cc05812b
1
H NMR titration and FTIR spectroscopy studies. See DOI
photophysical analyses and metal ion detection studies, limit of detection and quantification studies
Electronic supplementary information (ESI) available: Detailed experimental procedures, summary tables, and summary figures for synthesis of
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc05812b