Copper(II)-selective fluorimetric bulk optode membrane based on a 1-hydroxy-9,10-anthraquinone derivative having two propenyl arms as a neutral fluorogenic ionophore.
A new optical chemical sensor has been developed for the selective determination of copper(II) ions in aqueous solutions. The reversible sensing system was prepared by incorporating 1-hydroxy-2-(prop-2'-enyl)-4-(prop-2'-enyloxy)-9,10-anthraquinone (AQ) as a neutral Cu2+-selective fluoroionophore in the plasticized PVC membrane with potassium tetrakis(p-chlorophenyl borate) as an anionic additive. The response of the sensor is based on the fluorescence quenching of AQ by Cu2+ ions. At a pH 5.5, the proposed sensor displays a calibration response for Cu2+ over a wide concentration range of 1.0 x 10(-2) to 1.0 x 10(-6) M, with a relatively fast response of less than 40 s. In addition to high stability and reproducibility, the sensor shows a unique selectivity towards Cu2+ ion with respect to common co-existing cations. The proposed fluorescence optode was applied successfully to the determination of copper(II) in black tea samples.
Shamsipur
Mojtaba
M
Department of Chemistry, Razi University, Kermanshah, Iran. mshamsipur@yahoo.com
Poursaberi
Tahereh
T
Avanes
Armen
A
Sharghi
Hashem
H
D000880:Anthraquinones / Q000737:chemistry*; D015374:Biosensing Techniques; D002413:Cations, Divalent / Q000032:analysis; D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D005470:Fluorometry; D006863:Hydrogen-Ion Concentration; D007476:Ionophores / Q000737:chemistry*; D008567:Membranes, Artificial; D011143:Polyvinyl Chloride / Q000737:chemistry; D015203:Reproducibility of Results; D012996:Solutions
C508915:1-hydroxy-2-(prop-2'-enyl)-4-(prop-2'-enyloxy)-9,10-anthraquinone; D000880:Anthraquinones; D002413:Cations, Divalent; D005456:Fluorescent Dyes; D007476:Ionophores; D008567:Membranes, Artificial; D012996:Solutions; D003300:Copper; D011143:Polyvinyl Chloride