Facilitated transport of halides through Nafion ionomer membrane modified with lanthanide complexes

Ramkumar, Jayshree; Unnikrishnan, E.; Maiti, B.; Mathur, P.K.

doi:10.1016/s0376-7388(97)00318-9

Cited by 7 publications

(6 citation statements)

References 12 publications

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“…The most efficient transport properties were found for the chloride ions. Ramkumar et al (1998) studied the transport of chloride and bromide ions through a Nafion 117 cation exchange membrane by [R(tta) 3 ] complexes (R = Pr, Eu). The β-diketonate complexes were immobilized by precipitation on the polymer membrane.…”

Section: Solvent Extractionmentioning

confidence: 99%

Rare-earth beta-diketonates

Binnemans

2005

Handbook on the Physics and Chemistry of Rare Earths

397

303

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Contents 157 5.6. Solution structure 157 5.7. Electrochemical properties 158 5.8. Thermodynamic properties 159 5.9. Magnetic properties 159 5.10. Crystal-field splittings 160 5.11. Infrared spectra 161 5.12. Chirality sensing 161 5.13. Properties of hemicyanine dyes with βdiketonate counter ions 162 6. Luminescence of β-diketonate complexes 162 6.1. Photoluminescence 162 6.2. Electroluminescence 178 6.3. Triboluminescence 179 6.4. Sensitized chemiluminescence 183 7. From complexes to materials 185 7.1. Sol-gel glasses 185 7.2. Ormosils 186 7.3. β-Diketonates in polymer matrices 190 7.4. β-Diketonates in zeolites 195 7.5. Langmuir-Blodgett films (LB films) 197 7.6. Liquid crystals 200 7.7. Nonlinear optical materials 203 8. From materials to devices 205 8.1. Chelates for lasers 205 8.2. Organic light-emitting diodes (OLEDs) 206 8.3. Liquid crystal displays (LCDs) 216 8.4. Polymeric optical waveguides and amplifiers 217 9. NMR shift reagents 218 9.1. Historical development and general principles 218 9.2. Achiral shift reagents 221 9.3. Chiral shift reagents 226 10. Analytical applications 227 10.1. Trace analysis of lanthanide ions 227 10.2. Trace analysis of organic and biomolecular compounds 229 10.3. Luminescent visualization of latent fingerprints 230 10.4. Chemical sensors 232 10.5. Stationary phases in gas chromatography 232 11. Applications of volatile complexes 233 11.1. Volatile β-diketonate complexes 233 11.2. Gas chromatographic separation of the rare earths 237 11.3. Preparation of thin films by metalorganic chemical vapor deposition (MOCVD) 238 11.4. Preparation of thin films by atomic layer deposition (ALD) 241 11.5. Fuel additives 242 12. Solvent extraction 243 13. Catalytic properties 247

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Section: Solvent Extractionmentioning

confidence: 99%

Rare-earth beta-diketonates

Binnemans

2005

Handbook on the Physics and Chemistry of Rare Earths

397

303

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“…In practice, it has been observed that a slight permeation of anions occurs. [7][8][9][10][11][12] This is especially pronounced in cases where the ionic strengths of the solutions are high. Sikdar first reported this interesting property for Na +saturated membranes.…”

mentioning

confidence: 99%

“…It is normally expected to be permselective and to reject anions totally because of their electrical charge, which is identical to that of the fixed ions. In practice, it has been observed that a slight permeation of anions occurs. − This is especially pronounced in cases where the ionic strengths of the solutions are high. Sikdar first reported this interesting property for Na + -saturated membranes. − He observed that fluxes of l -alanine through the Na + -saturated membrane increased as the solute was shifted from neutral to anionic form and postulated the ”Donnan potential” theory.…”

mentioning

confidence: 99%

Transport of Low Molecular Weight Anions through a Nafion Ionomer Membrane: Application to Kraft Cooking Liquors

Danielsson

Yang

2000

Anal. Chem.

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The permeation of low molecular weight anions from liquors having high ionic strengths through a Nafion 811 membrane in Na+ form has been studied. The penetration of solutes through the membrane was monitored using UV-visible spectrometry. A relation between penetration and ionic size has been established. The influence of the presence of other ions on the permeation has also been investigated. The results show that the membrane has great potential as part of a selective interface in applications where the concentration of small anions is to be monitored in media with high ionic strengths. In light of the new results, we have validated a previously developed system for monitoring the concentrations of hydrogen sulfide ion and dissolved lignin in a laboratory-scale kraft cooking system.

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“…Since Nafion is a cation exchange membrane, pH of the external solution would affect the uptake property of Nafion. From our earlier studies [6][7][8] it was seen that for transition metal ions, the maximum uptake was in the pH range of 3.5-5.5 using sodium acetate buffer medium. Therefore in the present study, the pH was maintained in this range.…”

Section: Resultsmentioning

confidence: 96%

“…Permeation of neutral substances, heterocyclic bases and cations. [6][7][8] Knowledge of the basic transport phenomena of ions in ion exchange membranes was important for the applications of these membranes. Pretreatment of Nafion membrane prior to its use in study has a strong effect on the ion exchange properties.…”

Section: Introductionmentioning

confidence: 99%

Metal Ion Uptake Behaviour of Nafion in Presence of Organic Complexing Reagents

Ramkumar¹,

ramouleeswarana²

2017

MOJBOC

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In the present study, uptake studies of transition metal ions like Cu 2+ and Co 2+ were carried out with Nafion membrane. The effects of different experimental conditions were evaluated. The Nafion membrane was pre-treated by two different ways and used for the studies. The studies were also carried out in presence of complexing agents like ethylenediamine and EDTA. It was seen that the maximum uptake occurred in the pH range of 3-5. The uptake capacity of Nafion was affected by the pre-treatment procedure. This was attributed to the changes of Nafion structure. The presence of different Complexing agents in solution affects the uptake capacity. This could be understood from the strength of the complexes formed by metal ions and thus the reduction in the uptake capacity. The formation of negatively charged complexes by EDTA results in a very low uptake of the metal ions.

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Facilitated transport of halides through Nafion ionomer membrane modified with lanthanide complexes

Cited by 7 publications

References 12 publications

Rare-earth beta-diketonates

Rare-earth beta-diketonates

Transport of Low Molecular Weight Anions through a Nafion Ionomer Membrane: Application to Kraft Cooking Liquors

Metal Ion Uptake Behaviour of Nafion in Presence of Organic Complexing Reagents

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