Novel Cesium‐Selective Electrodes Based on Lipophilic 1,3‐Bisbridged Cofacial‐calix[6]crowns

Jeon, Seungwon; Yeo, Heekyoung; Lee, Hyo Kyoung; Ko, Seung Whan; Nam, Kye Chun

doi:10.1002/elan.200402847

Electroanalysis

2004

DOI: 10.1002/elan.200402847

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Novel Cesium‐Selective Electrodes Based on Lipophilic 1,3‐Bisbridged Cofacial‐calix[6]crowns

Seungwon Jeon

Heekyoung Yeo

Hyo Kyoung Lee

et al.

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Cited by 8 publications

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References 20 publications

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“…Surprisingly, the selectivities of fluorous membranes not only compare well with those of receptor-free membranes but also are in the range of those of ionophore-based Cs + selective electrodes (see Table ). Since the high selectivities of the fluorous membranes are the result of the low extent of solvation of interfering ions, we expect that similarly receptor-based fluorous membranes will be much more selective than corresponding nonfluorous ones.…”

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confidence: 86%

Fluorous Bulk Membranes for Potentiometric Sensors with Wide Selectivity Ranges: Observation of Exceptionally Strong Ion Pair Formation

2005

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Potentiometric sensors based on fluorous membranes doped with a fluorophilic tetraphenylborate derivative are shown to have a remarkably wide range of selectivities that exceeds the selectivity range of conventional polymeric membranes by 8 orders of magnitude. The fluorous character of these sensing membranes explains the formation of ion pairs of unprecedented strength. Ion pair formation constants in perfluoroperhydrophenanthrene, as measured in this work, are on the order of 1020 and exceed previously reported values for ion pair formation in nonpolar solvents by 6 orders of magnitude. The low solubility of lipids in such fluorous phases makes them very promising for the reduction of biofouling.

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confidence: 86%

Fluorous Bulk Membranes for Potentiometric Sensors with Wide Selectivity Ranges: Observation of Exceptionally Strong Ion Pair Formation

2005

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Polymeric membrane coated graphite cesium selective electrode based on 4′,4″(5′) di–tert-butyl di-benzo-18-crown-6

Sadeghi

Fathi

2009

J Incl Phenom Macrocycl Chem

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

Seo

Lee

2010

J Fluoresc

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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(+).

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Novel Cesium‐Selective Electrodes Based on Lipophilic 1,3‐Bisbridged Cofacial‐calix[6]crowns

Cited by 8 publications

References 20 publications

Fluorous Bulk Membranes for Potentiometric Sensors with Wide Selectivity Ranges: Observation of Exceptionally Strong Ion Pair Formation

Fluorous Bulk Membranes for Potentiometric Sensors with Wide Selectivity Ranges: Observation of Exceptionally Strong Ion Pair Formation

Polymeric membrane coated graphite cesium selective electrode based on 4′,4″(5′) di–tert-butyl di-benzo-18-crown-6

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

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