Silver-selective membrane electrodes using acyclic dithia benzene derivative neutral carriers. Comparison with related macrocyclic compounds

Casabó, Jaume; Flor, Teresa; Romero, M. I.; Teixidor, Francesç; Pérez-Jiménez, Consuelo

doi:10.1016/0003-2670(94)80196-7

Cited by 42 publications

(20 citation statements)

References 16 publications

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“…All compounds were tested as silver(I) ion sensors in membrane-based ion-selective electrodes, exhibiting good sensitivity, detection limits, reproducibility and selectivity. The chemical recognition of silver(I) by these receptors was compared to the behaviour presented by closely related macrocyclic and acyclic polythia compounds [177]. …”

Section: Application Of the Concept Of Supramolecular Chemistry In Thmentioning

confidence: 99%

Supramolecular Based Membrane Sensors

Ganjali

Norouzi

Rezapour³

et al. 2006

Sensors

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Section: Application Of the Concept Of Supramolecular Chemistry In Thmentioning

confidence: 99%

Supramolecular Based Membrane Sensors

Ganjali

Norouzi

Rezapour³

et al. 2006

Sensors

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“…In aqueous solutions, little or no reaction occurs between the sulfur containing ligands and either the alkali or alkaline earth metal ions, but the stability of complexes with mercury ions is enhanced markedly [35]. Since these ions display great affinity for soft coordination centers like sulfur [36], the use of thio compounds as carriers in ISEs is expected to increase their selectivity towards mercury over those of alkali, alkaline earth, and several other metal ions. Therefore, we were prompted to investi gate the behavior of a sulfur containing ligand, 2 mer captobenzimidazole (2MBI), as an ionophore in the construction of SC electrodes to estimate mercury ion concentration in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Mercury ion selective poly(aniline) solid contact electrode based on 2-mercaptobenzimidazol ionophore

Han

Park

et al. 2012

Russ J Electrochem

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A mercury(II) ion selective poly(aniline) solid contact electrode based on 2 mercaptobenzimida zol (2MBI) ionophore as a sulfur containing sensing material was successfully developed. The electrode exhibits a good linear response of 29.1 mV/decade (at 20 ± 0.2°C, r 2 = 0.997) within the concentration range of 1 × 10 -2 -1 × 10 -7 M Hg(II). The composition of this electrode was: ionophore 0.100, polyvinylchloride (PVC) 0.330, dibutylphthalate (DBP) 0.470, potassiumtetrakis(4 chlorophenyl)borate (KTpCIPB) 0.090, and oleic acid (OA) 0.010. A poly(aniline) solid contact electrode based on 2MBI with DBP and OA plasti cizers exhibited the best response characteristics of the results obtained for similarly coated wire type electrodes and solid contact electrodes based on only one DBP plasticizer. The electrode shows good selectivity for mer cury(II) ions in comparison with alkali, alkaline earth, transition and heavy metal ions. This electrode is suitable for use with aqueous solutions of pH 3.3-8.0 and the standard deviation in the measured EMF difference was ±0.5 mV in a mercury nitrate sample solution of 1.0 × 10 -2 M and ±1.1 mV in a mercury nitrate sample solution of 1.0 × 10 -3 M. The stabilization time was less than 15 min and the response time was less than 33 s. The elec trode was applied as a sensor for the determination of Hg(II) content in a sea water sample and some amalgam alloys. The results show good correlation with data obtained by atomic absorption spectrometry.

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“…Several ligand structural features including type and geometrical arrangement of the donor atoms, ability to coordinate with the soft silver ions and the presence of two linear coordination sites to fit the singular coordination is necessary to improve its selectivity for complexation with silver ion. On the basis of the response characteristics of the reported carrier-based silver ISEs, the following points are worth considering: the selectivity of some macrocyclic compounds toward silver ions is not due to the size of their cavity, but is related to the other ligand characteristics, so that non-cyclic carriers with suitable arrangement of donor atoms can show a better discrimination of Ag þ ion [29]; while the presence of some substituents with n-electrons [30][31][32] and oxygen atoms of the ligand mostly interact with Ag þ ion as a soft acid through ion-dipole interactions, which result in fast sensor response and higher sensitivity. Ion-sensors provide analytical procedures that overcome or minimise the drawbacks of liquid membrane electrodes since they are fast, convenient, can be handled easily and do not require sample pretreatment and large infrastructure backup.…”

Section: Introductionmentioning

confidence: 99%