Matches in SemOpenAlex for { <https://semopenalex.org/work/W2012020687> ?p ?o ?g. }
Showing items 1 to 96 of
96
with 100 items per page.
- W2012020687 endingPage "433" @default.
- W2012020687 startingPage "428" @default.
- W2012020687 abstract "The diffusional flux of an alkali metal ion against its own concentration difference was observed in the presence of a pH difference across a perfluorinated carboxylate ionomer membrane. Differential behavior of Li+, Na+, and K+ ions in each counter transport against proton transport through the membrane was found. The internal solution contained 1×10−1 mol dm−3 alkali metal hydroxide and 1×10−1 mol dm−3 alkali metal chloride, and the external solution contained 2×10−1 mol dm−3 alkali metal chloride and HCl of various concentrations in the range of 1×10−2 to 1×10−1 mol dm−3. The membrane potential rapidly changed in response to a pH jump in the external solution to reach an intermediate stage and then in a subsequent step it started to rise slowly to the final steady membrane potential. According to the assignments of the early fast step and the subsequent slow step in a time course to the changing process of the Donnan potential and the generation of intramembrane diffusion potential, respectively, the total membrane potential was divided into two constituents. The ion concentration at the membrane surface was obtained from the Donnan potential in each system. The diffusional flux was analyzed by using the ion concentration at the membrane surface and the intramembrane diffusion potential. By curve fitting of observed fluxes to theoretically calculated values, pKa for the acid dissociation constant of the COOH group in the perfluorinated ionomer membrane was obtained. The flux of the reverse permeation was ordered as Li+>Na+>K+. The enhancement in the system of Li+ ions has been interpreted in terms of the large value of the diffusion coefficient for protons rather than that for lithium ion its elf. It has been seen that from the polarity of the diffusion potential generated within the membrane it accelerates the transport of alkali metal ion in each system. Because of the high ratio of the diffusion coefficient of protons to that of Li+ ions, the acceleration effect of the diffusion potential is pronounced for the Li+ ion permeation against the concentration. The pKa of the COOH group in the membrane was found to be 1.34, 0.70, and 0.51 for H+–Li+, H+–Na+, and H+–K+ systems, respectively. This implies that pKa in the cluster-structured hydrophilic region for the Li+ ion system is apparently large due to the concentration effect of protons into the cluster region and that, for the K+ ion system, the effect of screening of the surface charge of the cluster by cations is large resulting in a shift of apparent pKa to the intrinsic value of the perfluorinated carboxy group." @default.
- W2012020687 created "2016-06-24" @default.
- W2012020687 creator A5032413007 @default.
- W2012020687 creator A5062431200 @default.
- W2012020687 date "2001-09-01" @default.
- W2012020687 modified "2023-10-16" @default.
- W2012020687 title "Proton-Driven Reverse Permeation of Alkali Metal Ions through a Perfluorinated Carboxylate Ionomer Membrane" @default.
- W2012020687 cites W1498862420 @default.
- W2012020687 cites W1981401336 @default.
- W2012020687 cites W2002015916 @default.
- W2012020687 cites W2015176992 @default.
- W2012020687 cites W2029351577 @default.
- W2012020687 cites W2044757571 @default.
- W2012020687 cites W2061998304 @default.
- W2012020687 cites W2076836950 @default.
- W2012020687 cites W2080592273 @default.
- W2012020687 cites W2085872790 @default.
- W2012020687 cites W2091166494 @default.
- W2012020687 cites W2124787352 @default.
- W2012020687 cites W2141128063 @default.
- W2012020687 cites W2256189166 @default.
- W2012020687 cites W4232715532 @default.
- W2012020687 doi "https://doi.org/10.1006/jcis.2001.7746" @default.
- W2012020687 hasPublicationYear "2001" @default.
- W2012020687 type Work @default.
- W2012020687 sameAs 2012020687 @default.
- W2012020687 citedByCount "6" @default.
- W2012020687 countsByYear W20120206872014 @default.
- W2012020687 countsByYear W20120206872016 @default.
- W2012020687 countsByYear W20120206872021 @default.
- W2012020687 crossrefType "journal-article" @default.
- W2012020687 hasAuthorship W2012020687A5032413007 @default.
- W2012020687 hasAuthorship W2012020687A5062431200 @default.
- W2012020687 hasConcept C102931765 @default.
- W2012020687 hasConcept C121332964 @default.
- W2012020687 hasConcept C147789679 @default.
- W2012020687 hasConcept C15920480 @default.
- W2012020687 hasConcept C17525397 @default.
- W2012020687 hasConcept C178790620 @default.
- W2012020687 hasConcept C179104552 @default.
- W2012020687 hasConcept C185592680 @default.
- W2012020687 hasConcept C198091228 @default.
- W2012020687 hasConcept C2775896084 @default.
- W2012020687 hasConcept C2776171763 @default.
- W2012020687 hasConcept C2778074193 @default.
- W2012020687 hasConcept C2778695967 @default.
- W2012020687 hasConcept C41625074 @default.
- W2012020687 hasConcept C50670333 @default.
- W2012020687 hasConcept C521977710 @default.
- W2012020687 hasConcept C55493867 @default.
- W2012020687 hasConcept C68801617 @default.
- W2012020687 hasConcept C69357855 @default.
- W2012020687 hasConcept C94421946 @default.
- W2012020687 hasConcept C97355855 @default.
- W2012020687 hasConceptScore W2012020687C102931765 @default.
- W2012020687 hasConceptScore W2012020687C121332964 @default.
- W2012020687 hasConceptScore W2012020687C147789679 @default.
- W2012020687 hasConceptScore W2012020687C15920480 @default.
- W2012020687 hasConceptScore W2012020687C17525397 @default.
- W2012020687 hasConceptScore W2012020687C178790620 @default.
- W2012020687 hasConceptScore W2012020687C179104552 @default.
- W2012020687 hasConceptScore W2012020687C185592680 @default.
- W2012020687 hasConceptScore W2012020687C198091228 @default.
- W2012020687 hasConceptScore W2012020687C2775896084 @default.
- W2012020687 hasConceptScore W2012020687C2776171763 @default.
- W2012020687 hasConceptScore W2012020687C2778074193 @default.
- W2012020687 hasConceptScore W2012020687C2778695967 @default.
- W2012020687 hasConceptScore W2012020687C41625074 @default.
- W2012020687 hasConceptScore W2012020687C50670333 @default.
- W2012020687 hasConceptScore W2012020687C521977710 @default.
- W2012020687 hasConceptScore W2012020687C55493867 @default.
- W2012020687 hasConceptScore W2012020687C68801617 @default.
- W2012020687 hasConceptScore W2012020687C69357855 @default.
- W2012020687 hasConceptScore W2012020687C94421946 @default.
- W2012020687 hasConceptScore W2012020687C97355855 @default.
- W2012020687 hasIssue "2" @default.
- W2012020687 hasLocation W20120206871 @default.
- W2012020687 hasOpenAccess W2012020687 @default.
- W2012020687 hasPrimaryLocation W20120206871 @default.
- W2012020687 hasRelatedWork W2087572532 @default.
- W2012020687 hasRelatedWork W2477442174 @default.
- W2012020687 hasRelatedWork W2737702036 @default.
- W2012020687 hasRelatedWork W2758636021 @default.
- W2012020687 hasRelatedWork W2958290053 @default.
- W2012020687 hasRelatedWork W2990772530 @default.
- W2012020687 hasRelatedWork W3174622509 @default.
- W2012020687 hasRelatedWork W4248274913 @default.
- W2012020687 hasRelatedWork W4302293111 @default.
- W2012020687 hasRelatedWork W4379931760 @default.
- W2012020687 hasVolume "241" @default.
- W2012020687 isParatext "false" @default.
- W2012020687 isRetracted "false" @default.
- W2012020687 magId "2012020687" @default.
- W2012020687 workType "article" @default.