Charge-Transfer Triiodide Ion-Selective Electrode Based on 7,16-Dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane

Khayatian, Gholamreza; Rezatabar, Hadi; Salimi, Abdollah

doi:10.2116/analsci.21.297

Cited by 9 publications

(18 citation statements)

References 35 publications

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“…7,10 On the other hand, it seems that the substitution of the electron donating tertiary butyl dicyclo groups on 18C6 moiety causes it to become highly insoluble in water, as a result, the electrode life time increase. Furthermore, as mentioned before, 8 with the usage of the ligand alone in the membrane, we don't need to prepare a charge transfer complex and therefore escapes a time consuming procedure for making ionophore.…”

Section: Resultsmentioning

confidence: 99%

“…However, the observed change below and above this pH range may be due to protonation of macrocycle as well as disproportionate reaction between I 3 -and OH -resulting in the formation of hypoiodate and iodide 7,8,12,20 (Eqs. 1 and 2), both of which are insensitive to the membrane electrode.…”

Section: Resultsmentioning

confidence: 99%

“…7,8,15 To this solution, 1.1 mg of ionophore (I) and 0.3 mg NaTPB were added and mixed well. The resulting mixtures were transferred into a glass dish of 2 cm diameter.…”

Section: Electrode Preparationmentioning

confidence: 99%

“…Research on anti-Hofmeister sensing material for anions is an expeditiously expanding domain in chemical sensors. Recently, anion membrane electrodes, especially those based on vitamin B12 derivatives, 3 metalloporphrins, 4 metallophtalocyanines, 5 Schiff-base complexes 6 and charge transfer complexes [7][8][9][10][11][12] have been reported as possessing improved characteristics in selectivity. Due to importance of triiodide ion in industry, pharmacology and environmental pollution, such as determination of copper, 8,13 iron 13 and antimony 13 in ore samples, determination of ascorbic acid and hydroquinone in drug 9 and determination of chlorine and dissolved O 2 in water.…”

Section: Introductionmentioning

confidence: 99%

“…14 Ttherefore, a sensitive method is required for its reliable measurement. We have recently introduced two PVC-based membrane sensors for triiodide ions 7,8 using macrocyclic ligands (such as DBzDA18C6 7 and C222 8 ) as ion carrier. Although they are sensitive and very selective electrodes, they suffer from a short life time (1 month).…”

Section: Introductionmentioning

confidence: 99%

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Triiodide PVC Membrane Electrode Based on a Charge‐Transfer Complex of Iodine with Ditertbutyl‐Dicyclohexyl‐18‐Crown‐6

Khayatian

Karoonian

2008

J Chinese Chemical Soc

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A new triiodide ion-selective electrode based on a charge-transfer complex of iodine with ditertbutyldicyclohexyl-18-crown-6 (t-Bu) 2 DC18C6 as membrane carrier was prepared. The electrode has a linear dynamic range from 6.3´10-3 -5´10 -6 with a Nernstian response of 58.6 ± 1 mV decade -1 and a detection limit of 1.3´10 -6 M. The response time of the sensor was 25 s. The membrane could be used for two months without any divergence in potentials. The electrode exhibits an anti-Hofmeistetr selectivity sequence with a preference for triiodide at pH 2.0-10.0. The response mechanism of the electrode was investigated by Uv-Vis spectroscopic technique. The electrode can be used for the determination of ascorbic acid in orange juice.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…7,8,15 To this solution, 1.1 mg of ionophore (I) and 0.3 mg NaTPB were added and mixed well. The resulting mixtures were transferred into a glass dish of 2 cm diameter.…”

Section: Electrode Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Triiodide PVC Membrane Electrode Based on a Charge‐Transfer Complex of Iodine with Ditertbutyl‐Dicyclohexyl‐18‐Crown‐6

Khayatian

Karoonian

2008

J Chinese Chemical Soc

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Design and Application of a Triiodide‐Selective Membrane Electrode

et al. 2011

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I 3À -selective electrodes with a PVC membrane containing ionic associates of crystal violet (CV) triiodide as electrode-active substance were developed. The pH working range is 2-12, the linearity range of the electrode function is 9 10 À6 -1 10 À1 mol/L, and the electrode function slopes are varying from 44.0 to 62.0 mV/decade, depending on the plasticizers in the membranes. The efficiency of the use of these electrodes for dibenzoyl peroxide and magnesium monoperoxyphthalate determination in pharmaceutical preparations was shown by potentiometric titration methods. Due to the functional properties of ion associates (IA) to donate both a cation and an anion as potential-determining ions, they are the most universal ionophores [2][3][4][5]. It is likely that solubility is the main restriction for their use as ionophores [5]. The solubility of IAs should be sufficiently low in water phase; otherwise they will be washed out from the membranes, and, at the same time, large in the membrane phase, because it will be difficult to obtain a homogeneous membrane. Ion associates formed by various quaternary ammonium or phosphonium bases most often exhibit such properties [2][3][4][5][6][7][8][9][10][11][12]. Previously, we analyzed the applicability of ISEs based on ion associates of basic dyes as electrode active substances in analytical chemistry [13][14][15][16]. These systems were barely used for the determination of organic substances. KeywordsThe iodide ion is a sufficiently good reducing agent to react quantitatively with a number of oxidizing agents. It has various applications in industry, pharmacology, food and environmental pollution, such as determination of iron, copper and antimony in ore [17] We previously demonstrated the effectiveness of IA on the basis of crystal violet for making diclofenac selective sensors [32].In this work, we report on the use of crystal violet (CV) triiodide ion associate as an excellent ionophore for a PVC membrane triiodide sensor, and develop a simple and inexpensive technique for the assaying of dibenzoyl peroxide and magnesium monoperoxyphthalate in pharmaceutical preparations by potentiometric titration methods.An ion associate of triiodide and crystal violet was prepared by mixing equal quantities of 1 10 À2 mol/L triiodide solution and 1 10 À2 mol/L basic dye CV solution. The mixture was settled during 2 hours and the sediment of the ion associate was filtered (quantitative rapid filter paper). This residue was treated with 50 mL cold distilled water. The filter paper containing the precipitate was dried for 24 h at room temperature. This triiodide-CV IA was used as an electrode active substance (EAS) for preparing ISEs for magnesium monoperoxyphthalate determination.A triiodide-selective electrode for ionometric analysis was developed using PVC membranes plasticized with dibutyl phthalate (DBP), dioctyl phthalate (DOP), dinonyl phthalate (DNP), dibutyl sebacate (DBS), or tricresyl 2144

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Triiodide Ion‐Selective Electrode Based on Charge‐Transfer Complex of 4,7,13,16,21,24‐Hexaoxa‐1,10‐diazabicyclo‐[8.8.8]hexacosane

Khayatian

Rezatabar

Karonian

et al. 2006

J Chinese Chemical Soc

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Two new highly selective triiodide electrodes have been prepared using charge‐transfer complex of iodine with cryptand 222 as an electroactive ionophore and nitrophenyl octyl ether as a plasticizing agent. The electrodes showed Nernstian response to triiodide ions over a concentration range from 1.0 × 10−;2 — 7.9 × 10−;7 M and from 1.0 × 10−;2 — 1 × 10−;6 M with detection limits of 6.3 × 10−;7 and 7.9 × 10−;7 M for cryptand and its charge‐transfer complex with iodine, respectively. The response times (t95%) of the sensors were 10 and 5 s. The membrane could be used for more than 1 month without any divergence in potentials. The proposed sensors exhibited very high selectivity for triiodide ion over other anions, and could be used in a wide pH range ˜2–10. These electrodes were successfully applied as an indicator electrode in potentiometric titration of copper in ore samples.

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Charge-Transfer Triiodide Ion-Selective Electrode Based on 7,16-Dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane

Cited by 9 publications

References 35 publications

Triiodide PVC Membrane Electrode Based on a Charge‐Transfer Complex of Iodine with Ditertbutyl‐Dicyclohexyl‐18‐Crown‐6

Triiodide PVC Membrane Electrode Based on a Charge‐Transfer Complex of Iodine with Ditertbutyl‐Dicyclohexyl‐18‐Crown‐6

Design and Application of a Triiodide‐Selective Membrane Electrode

Triiodide Ion‐Selective Electrode Based on Charge‐Transfer Complex of 4,7,13,16,21,24‐Hexaoxa‐1,10‐diazabicyclo‐[8.8.8]hexacosane

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