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Simultaneous determination of cadmium (II) and zinc (II) by molecular fluorescence spectroscopy and multiple linear regression using an anthrylpentaazamacrocycle chemosensor.

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Yunus, Sami [UCL] Charles, S. Dubois, F. Vander Donckt, E

The work that is reported here concerns a method that allows the simultaneous determination of cadmium (II) and zinc (II) in aqueous solution by molecular fluorescence spectroscopy using 9-(1',4',7',10',13'-pentaazacyclopentadecyl)-methylanthracene. For this chemosensor, the fluorophore pi-system is insulated from an azacrown donor by one methylene group. A self-quenching mechanism, resulting from an electron transfer from the nitrogens of the azacrown to the excited aromatic system, essentially precludes fluorescence emission. Fluorescence is restored when cadmium (II) or zinc (II) are chelated by the macrocycle. The difference between the emission spectra profiles of the free chemosensor, the cadmium and the zinc chelates is such that the concentration determination of the two metals and the remaining free chemosensor is possible at the nanomolar scale in only one experiment using a multiple linear regression algorithm. Usefulness and convenience of this simple method is proven by steady state and kinetic quantitative determination experiments.

Document type Article de périodique (Journal article) – Journal Article
Access type Accès restreint
Publication date 2008
Journal information "Journal of fluorescence" - Vol. 18, no. 2, p. 499-506 (2008)
Peer reviewed yes
issn 1053-0509
Publication status Publié
Affiliation UCL - FSA/MAPR - Département des sciences des matériaux et des procédés
MESH Subject Anthracenes - chemistry ; Cadmium - chemistry ; Heterocyclic Compounds, 1-Ring - chemistry ; Macrocyclic Compounds - chemistry ; Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Molecular Probe Techniques ; Molecular Structure ; Organometallic Compounds - analysis - chemistry ; Spectrometry, Fluorescence - methods ; Zinc - chemistry
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Bibliographic reference Yunus, Sami ; Charles, S. ; Dubois, F. ; Vander Donckt, E. Simultaneous determination of cadmium (II) and zinc (II) by molecular fluorescence spectroscopy and multiple linear regression using an anthrylpentaazamacrocycle chemosensor.. In: Journal of fluorescence, Vol. 18, no. 2, p. 499-506 (2008)
Permanent URL http://hdl.handle.net/2078.1/29432