Ion-selective electrodes based on cation-proton coupled countertransport

Fyles, Thomas M.; McGavin, Cynthia A.

doi:10.1021/ac00249a044

Cited by 14 publications

(4 citation statements)

References 19 publications

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“…The interfaces were 1.54 cm' and remained quiescent throughout the experiments. The general methods for purification of carriers and kinetic analyses were as previously described (15,16,17,20,31). The syntheses of the carriers D2TA2 and 4NHD2TA are desc1,~ed below.…”

Section: Methodsmentioning

confidence: 99%

Membrane transport systems. V. Coupled countertransport of alkaline earth cations and protons

Dulyea¹,

Fyles²,

Whitfield³

1984

Can. J. Chem.

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LYNN M. DULYEA, THOMAS M. FYLES, and DENNIS M. WHITFIELD. Can. J. Chem. 62, 498 (1984). The extraction and transport of alkaline earth cations from a basic to an acidic solution across an artificial membrane by crown ether carboxylic acids are reported. Monocarboxylate carriers achieve the transport via 2: 1 complexes or by ternary complexes in the presence of readily extractible anions, while dicarboxylate carriers transport cations as I : I complexes. Both types of carrier exhibit two regimes of kinetic behaviour depending on the relative concentrations of the carrier and the metal ion: a zero order regime in which the rate depends only on the carrier concentration, and a reversible consecutive first order regime in which the rate depends only on the metal ion concentration. In the former, the rate of adsorption of the carrier on the interface is presumed to be rate limiting while in the latter, the diffusion of metal ion to the interface is rate limiting. Carrier structure exerts a general influence over both the rate and selectivity of transport but this influence varies with the kinetic regime considered.LYNN M. DULYEA, THOMAS M. FYLES et DENNIS M: WHITFIELD. Can. J . Chem. 62, 498 (1984). On rapporte des extractions et des transports de cations d'alcalino-terreux de solutions basiques vers des solutions acides a travers une membrane artificielle effectuts par des Cthers couronnes d'acides carboxyliques. Les transporteurs monocarboxylCs permettent d'effectuer les transferts via des complexes 2: 1 ou par le biais de complexes ternaires en presence d'anions qui peuvent &tre extraits facilement; par ailleurs, les transporteurs dicarboxylts effectuent le transport des cations sous forme de complexes I : I . Les deux types de transporteurs presentent deux rtgimes de comportement cinCtique diffkrents suivant les concentrations relatives de transporteur et d'ion mCtallique: un rCgimc d'ordre zCro dans lequel la vitesse dtpend uniquement de la concentration de transporteur et un regime du premier ordre constcutif et rCversible dans lequel la vitesse dCpend uniquement de la concentration de l'ion mttallique. Dans le premier rCgime, on suppose que la vitesse d'adsorption du transporteur a I'interfacc est I'Ctape dkterminante alors que dans le dernier regime, la diffusion de l'ion mCtallique a I'interface serait I'ttape dtterminante. La structure du transporteur exerce une influence gCntrale i la fois sur la vitesse et sur la sClectivit6 du transport mais cette influence varie avec le regime cinCtique considtrC.[Traduit par le journal]

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Section: Methodsmentioning

confidence: 99%

Membrane transport systems. V. Coupled countertransport of alkaline earth cations and protons

Dulyea¹,

Fyles²,

Whitfield³

1984

Can. J. Chem.

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“…Much of the work currently being done with ion selective electrodes involves membranes which are similar in principle to supported liquid membranes, and treatises on such electrodes contain a wealth of useful information relevent to this aspect of membrane transport chemistry. One of the few reports about proton-ionizable crown ethers in supported membrane media concerns the attempt to use compounds CXXV, CXXVI, CXLI, and CXLII in ion selective electrodes [128].…”

Section: Supported Liquid Membranesmentioning

confidence: 99%

Ion Extraction and Transport by Proton-Ionizable Crown Ethers

Brown¹,

Bartsch²

1991

Inclusion Aspects of Membrane Chemistry

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“…methyl tris(hydroxyethyl)ammonium (MTEA') as a non-extractable cation and were prepared from MTEA+OH-, which was prepared as previously described (38). A stock buffer solution was prepared from glycine by addition of MTEAOH to reach a final pH of 9.6 and then made to volume to contain 2 X lo-' M glycine.…”

Section: And Eq [I] (23)mentioning

confidence: 99%

Equilibrium and kinetic studies of a chemical model of active transport: Membrane transport of potassium salts by cryptand carriers driven by potassium ion complexation

Fyles¹,

Hansen²

1988

Can. J. Chem.

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A theoretical framework of energy transduction in membranes was used as a point of departure for the design of a simple chemical model of primary active transport (reaction pumping). In the model, cryptand carriers transport potassium salts across a bulk liquid membrane, driven by the complexation of potassium by a dicarboxylate crown ether in one aqueous phase. Both the equilibrium position and kinetic behavior of the model system could be predicted from the theoretical framework. Experimental verification of the predictions confirms the fitness of the theoretical framework and provides a design tool for the formulation of new membrane transport systems. THOMAS M. FYLES et STEVEN P. HANSEN. Can. J. Chem. 66, 1445Chem. 66, (1988.On a utilise un cadre de rtference thtorique de l'energie de transduction dans les membranes comme point de dtpart pour tlaborer un modkle chimique simple du transport actif primaire (reaction de pompage). Dans ce modkle, le transport des sels de potassium a travers une membrane liquide globale est effectue par un cryptand qui y est entrain6 par la complexation du potassium, i partir d'une phase aqueuse, par un ether couronne portant deux groupements carboxylates. On peut predire la position de I'equilibre ainsi que le comportement cinetique du systkme modkle i partir du cadre de rtftrence thtorique. Une verification experimentale des predictions permet de confirmer l'utilitk du cadre theorique et fournit un outil pour Claborer la formulation de nouveaux systkmes de transport membranaire.[Traduit par la revue]

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Ion-selective electrodes based on cation-proton coupled countertransport

Cited by 14 publications

References 19 publications

Membrane transport systems. V. Coupled countertransport of alkaline earth cations and protons

Membrane transport systems. V. Coupled countertransport of alkaline earth cations and protons

Ion Extraction and Transport by Proton-Ionizable Crown Ethers

Equilibrium and kinetic studies of a chemical model of active transport: Membrane transport of potassium salts by cryptand carriers driven by potassium ion complexation

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