Proton-driven cation transport through a polymer membrane

Fyles, Thomas M.; McGavin, Cynthia A.; Thompson, David E.

doi:10.1039/c39820000924

Cited by 11 publications

(4 citation statements)

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“…Therefore, an uphill transport of alkali metal ions can be attained by pH control. [10][11][12][13][14][15][16][17][18][19] On the other hand, the metal ion complexing ability and selectivity of crown ether derivatives bearing a photochromic moiety such as an azobenzene group, which is isomerized from its trans to cis forms by UV-light irradiation and vice versa by visible-light irradiation, were controlled by photoirradiation. For example, a bis(crown ether) bearing an azobenzene moiety as the bridging unit of two crown ethers was used as a photoresponsive ionophore for alkali metal ions, and the metal ion transporting ability and selectivity of the bis(crown ether) derivative were controlled by photoirradiation.…”

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confidence: 99%

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Photoresponsive Liquid Membrane Transport of Alkali Metal Ions Using Crowned Spirobenzopyrans

et al. 2005

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Several azacrown ether derivatives, which are monoaza-12-crown-4, -15-crown-5, and -18-crown-6 and diaza-12-crown-4 and -18-crown-6, bearing one or two spirobenzopyran(s), which we call crowned spirobenzopyran or crowned bis(spirobenzopyran), were synthesized and were used as carriers for liquid membrane transport of alkali metal ions. The passive alkali metal transports through liquid membranes containing crowned spirobenzopyrans were carried out under dark, and UV- and visible-light irradiation conditions. The metal ion transport was accelerated and retarded by UV- and visible-light irradiation, respectively. On the other hand, the photoresponse of the metal ion selectivity in membrane transport by crowned spirobenzopyrans was different, depending on the kind of crown ether units. Especially, diaza-12-crown-4-bis(spirobenzopyran) exhibited an excellently selective and effective transporting ability for Li(+). The uphill transports of Li(+) through a liquid membrane containing monoaza-12-crown-4-spirobenzopyran or diaza-12-crown-4-bis(spirobenzopyran) were realized under the conditions where the same aqueous solution was used as the source and receiving phases with UV and visible lights being irradiated onto the boundary phases between the source and membrane phases and between the receiving and membrane phases, respectively. The uphill transport of Li(+) from the source to receiving phases through a liquid membrane containing a crowned spirobenzopyran was also attained by the proton-concentration gradient between the source and receiving phases under dark conditions, and the transporting ability was remarkably increased by photoirradiation.

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“…This phenomenon of crown compounds bearing proton dissociable group(s) is useful for the liquid membrane transport of alkali metal ion, because the transport can be accelerated by pH difference between the source and receiving phases. Therefore, an uphill transport of alkali metal ions can be attained by pH control. − …”

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Photoresponsive Liquid Membrane Transport of Alkali Metal Ions Using Crowned Spirobenzopyrans

et al. 2005

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“…Organic membrane processes have become an attractive option to unadventurous solvent extraction for selective separation and concentration of various compounds such as metals and acids from dilute aqueous solution for the reason that it combines in a single stage, an extraction, and a stripping operation. In order to reduce the amounts of reactants and energy needed for separations and to decrease the environmental and economic impact of solvent extraction separations, several membrane‐based separation techniques have been proposed in the past decades …”

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confidence: 99%

Preparation of poly (N,N‐dimethylaminoethyl methacrylate) (PDAEM) membranes: Application for water purification

Abdellaoui

Laoui

Cerbah

et al. 2018

J of Applied Polymer Sci

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The present work concerns a development of new membranes for performing ions separation. These membranes were prepared by solution casting followed by solvent evaporation, using a commercial cellulose triacetate (CTA), synthesized poly (N,Ndimethylaminoethyl methacrylate), macrocylic polyethers (15-crown-5 and Dibenzo-24-crown-8) as carrier and dioctylphtalate as plasticizer. Different Polymer Inclusion Membranes were characterized using physical and chemical techniques as well as Fourier transform infrared, thermogravimetric analysis, and scanning electron microscopy. Transport of lead and cadmium in aqueous solution has been studied using these systems. The selective separation of these membranes is accomplished by the presence of specific compounds, called carriers, in the membrane phase. The carriers are responsible to facilitate the transport of the target component across selective membranes. The influence of the membrane nature has been studied using some supports of different physical characteristics.

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“…The conventional routes, concern the synthesis of porous inorganic or hybrid membranes of well-defined pore size [2] or the modification of the surface properties in order to introduce specific interactions or electrostatic repulsive/attractive effects as in the case of membranes for electro dialysis [3].…”

Section: Introductionmentioning

confidence: 99%

Cadmium (II) and lead (II) transport in a polymer inclusion membrane using tributyl phosphate as mobile carrier and CuFeO2 as a polarized photo electrode

Arous

Amara

Trari

et al. 2010

Journal of Hazardous Materials

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Proton-driven cation transport through a polymer membrane

Abstract: Membranes formed from polyacrylamide derivatives bearing pendant crown ether-carboxylic acid groups act as proton-driven alkali metal ion pumps.

Cited by 11 publications

References 1 publication

Photoresponsive Liquid Membrane Transport of Alkali Metal Ions Using Crowned Spirobenzopyrans

Photoresponsive Liquid Membrane Transport of Alkali Metal Ions Using Crowned Spirobenzopyrans

Preparation of poly (N,N‐dimethylaminoethyl methacrylate) (PDAEM) membranes: Application for water purification

Cadmium (II) and lead (II) transport in a polymer inclusion membrane using tributyl phosphate as mobile carrier and CuFeO2 as a polarized photo electrode

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