1 Ocak 2019 Dergi makalesi Açık Erişim

Yilmaz, Ibrahim; Chen, Li D.; Chen, Xin V.; Anderson, Evan L.; da Costa, Rosenildo Correa; Gladysz, John A.; Buhlmann, Philippe

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/68193</identifier>
  <creators>
    <creator>
      <creatorName>Yilmaz, Ibrahim</creatorName>
      <givenName>Ibrahim</givenName>
      <familyName>Yilmaz</familyName>
    </creator>
    <creator>
      <creatorName>Chen, Li D.</creatorName>
      <givenName>Li D.</givenName>
      <familyName>Chen</familyName>
      <affiliation>Univ Minnesota, Dept Chem, 207 Pleasant St Southeast, Minneapolis, MN 55455 USA</affiliation>
    </creator>
    <creator>
      <creatorName>Chen, Xin V.</creatorName>
      <givenName>Xin V.</givenName>
      <familyName>Chen</familyName>
      <affiliation>Univ Minnesota, Dept Chem, 207 Pleasant St Southeast, Minneapolis, MN 55455 USA</affiliation>
    </creator>
    <creator>
      <creatorName>Anderson, Evan L.</creatorName>
      <givenName>Evan L.</givenName>
      <familyName>Anderson</familyName>
      <affiliation>Univ Minnesota, Dept Chem, 207 Pleasant St Southeast, Minneapolis, MN 55455 USA</affiliation>
    </creator>
    <creator>
      <creatorName>da Costa, Rosenildo Correa</creatorName>
      <givenName>Rosenildo Correa</givenName>
      <familyName>da Costa</familyName>
    </creator>
    <creator>
      <creatorName>Gladysz, John A.</creatorName>
      <givenName>John A.</givenName>
      <familyName>Gladysz</familyName>
      <affiliation>Texas A&amp;M Univ, Dept Chem, POB 30012, College Stn, TX 77842 USA</affiliation>
    </creator>
    <creator>
      <creatorName>Buhlmann, Philippe</creatorName>
      <givenName>Philippe</givenName>
      <familyName>Buhlmann</familyName>
      <affiliation>Univ Minnesota, Dept Chem, 207 Pleasant St Southeast, Minneapolis, MN 55455 USA</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Potentiometric Selectivities Of Lonophore-Doped Ion-Selective Membranes: Concurrent Presence Of Primary Ion Or Interfering Ion Complexes Of Multiple Stoichiometries</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2019</publicationYear>
  <dates>
    <date dateType="Issued">2019-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/68193</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1021/acs.analchem.8b05196</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">The selectivities of ionophore-doped ion selective electrode (ISE) membranes are controlled by the stability and stoichiometry of the complexes between the ionophore, L, and the target and interfering ions (I-zi and J(zj), respectively). Well-accepted models predict how these selectivities can be optimized by selection of ideal ionophore-to-ionic site ratios, considering complex stoichiometries and ion charges. These models were developed for systems in which the target and interfering ions each form complexes of only one stoichiometry. However, for a few ISEs, the concurrent presence of two primary ion complexes of different stoichiometries, such as ILzi and IL2zi, was reported. Indeed, similar systems were probably often overlooked and are, in fact, more common than the exclusive formation of complexes of higher stoichiometry unless the ionophore is used in excess. Importantly, misinterpreted stoichiometries misguide the design of new ionophores and are likely to result in the formulation of ISE membranes with inferior selectivities. We show here that the presence of two or more complexes of different stoichiometries for a given ion may be inferred experimentally from careful interpretation of the potentiometric selectivities as a function of the ionophore-to-ionic site ratio or from calculations of complex concentrations-using experimentally determined complex stabilities. Concurrent formation of JL(zj) and JL(2)(zj) complexes of an interfering ion is shown here to shift the ionophore-to-ionic site ratio that provides the highest selectivities. Formation of ILnzi and ILn-1zi complexes of a primary ion is less of a concern because an optimized membrane typically contains an excess of ionophore, but lower than expected selectivities may be observed if the stepwise complex formation constant, K-IILiv is not sufficiently large and the ionophore-to-ionic site ratio does not markedly exceed n.</description>
  </descriptions>
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