Linked Life Data

17631098

Source:http://linkedlifedata.com/resource/pubmed/id/17631098

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2007-7-16
pubmed:abstractText
Novel aluminum(III)- and zirconium(IV)-tetraphenylporhyrin (TPP) derivatives are examined as fluoride-selective ionophores for preparing polymer membrane-based ion-selective electrodes (ISEs). The influence of t-butyl- or dichloro-phenyl ring substituents as well as the nature of the metal ion center (Al(III) versus Zr(IV)) on the anion complexation constants of TPP derivative ionophores are reported. The anion binding stability constants of the ionophores are characterized by the so-called "sandwich membrane" method. All of the metalloporphyrins examined form their strongest anion complexes with fluoride. The influence of plasticizer as well as the type of lipophilic ionic site additive and their amounts in the sensing membrane are discussed. It is shown that membrane electrodes formulated with the metalloporphyrin derivatives and appropriate anionic or cationic additives exhibit enhanced potentiometric response toward fluoride over all other anions tested. Since selectivity toward fluoride is enhanced in the presence of both anionic and cationic additives, the metalloporphyrins can function as either charged or neutral carriers within the organic membrane phase. In contrast to previously reported fluoride-selective polymeric membrane electrodes based on metalloporphyrins, nernstian or near-nernstian (-51.2 to -60.1 mV decade(-1)) as well as rapid (t < 80 s) and fully reversible potentiometric fluoride responses are observed. Moreover, use of aluminum(III)-t-butyltetraphenylporphyrin as the ionophore provides fluoride sensors with prolonged (7 months) functional lifetime.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-10596210, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-10740849, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-11128934, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-11838668, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-12139034, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-12236368, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-12553770, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-15179717, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-15373442, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-15826159, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-16223262, http://linkedlifedata.com/resource/pubmed/commentcorrection/17631098-17723658
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1873-4324
pubmed:author
pubmed:issnType
Electronic
pubmed:day
23
pubmed:volume
596
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
201-9
pubmed:dateRevised
2010-12-3
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Polymeric membrane electrodes with improved fluoride selectivity and lifetime based on Zr(IV)- and Al(III)-tetraphenylporphyrin derivatives.
pubmed:affiliation
Warsaw University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, 00-664 Warsaw, Poland.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural