A Novel Fluorescent Cesium Ion-Selective Optode Membrane based on 15-Crown-5-Anthracene

Abstract

An optode system based on a plasticized polymer membrane containing cesium ion-selective fluoroionophore and lipophilic anions for the determination of cesium ions has been developed. In this work, 15-crown-5 derivative including anthracene was used as a fluoroionophore. Emission intensity of the optode membrane incorporating 15-crown-5-anthracene was measured at 500 nm with excitation at 360 nm in the presence of Tris-HCl buffer solution. Under optimum experimental condition, the relative fluorescence intensity was linear with the concentration of cesium ion in the range of 1.0 × 10(-4) M to 1.0 × 10(-1) M and the detection limit was obtained 4.2 × 10(-5) M, as defined by LOD=3 × S(b)/m (where S(b)=standard deviation of blank signal and, m=slope of the calibration curve). The effect of pH of sample solution on the fluorescent response, the selectivity, response time and reproducibility of the optode membrane were also discussed. The fluorescent optode system shows a high selectivity and sensitivity for cesium ion with respect to other cations such as K(+), Na(+) and Li(+).

Intracellular Imaging of Cesium Distribution in Arabidopsis Using Cesium Green

“…By using the optode method, aqueous-phase Cs detection and estimation of the selectivity by organic-phase extraction become possible. Also, there exist other optode methods for determination of Cs + , which may be useful for comparative purposes. , In this work, the optode membrane was prepared from Cesium Green-C12, the pH-response dye KDM-13, the cation exchanger NaTFPB, and the plasticizer dioctyl sebacate with poly­(vinyl chloride) as a matrix.…”

Selective chemical binding enhances cesium tolerance in plants through inhibition of cesium uptake

“…By contrast, it is a general agreement that effects of the chemical treatment are universal across most of the plant species, especially when the chemical works outside of the plants as is the case of CsTolen A. Although various compounds and materials such as zeolites, silicates and crown ethers have been proposed as selective Cs + -capturing agents for the decontamination of radioactive waste water2122232425262728, this is the first report, to the best of our knowledge, on a compound which, through selective binding, enables a plant to avoid Cs + uptake and thus harmful accumulation. The efficacy of CsTolen A needs to be assessed in the field at Fukushima, the site of the nuclear accident29.…”