Thiophene-based electrochemically active probes for selective calcium detection

Thiophene-based electrochemically active probes for selective calcium detection

Electrochemically active probes containing a tetraalkylated p-phenylenediamine redox responsive moiety and thiophene ligands were found to be sensitive to calcium ions. The electrochemical studies revealed that these compounds were able to bind Ca2+ ions. The redox properties of the transducer under...

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Veröffentlicht in:Electrochimica acta 2012-02, Vol.63, p.228-231
Hauptverfasser: Sahli, Rihab, Raouafi, Noureddine, Maisonhaute, Emmanuel, Boujlel, Khaled, Schöllhorn, Bernd
Format: Artikel
Sprache:eng
Schlagworte:
Analytical chemistry
Calcium
Calcium ions
Chelation
Chemical Sciences
Chemistry
Cyclic voltammetry
Differential plus voltammetry
Electroactive chemosensors
Electrode potentials
Exact sciences and technology
General, instrumentation
Ligands
Other
p-Phenylenediamine
Thiophenes
Transducers
Zinc
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Beschreibung
Zusammenfassung:Electrochemically active probes containing a tetraalkylated p-phenylenediamine redox responsive moiety and thiophene ligands were found to be sensitive to calcium ions. The electrochemical studies revealed that these compounds were able to bind Ca2+ ions. The redox properties of the transducer underwent dramatic changes upon calcium chelation provoking large oxidation potential shifts comprised between 549 and 911mV. A high selectivity towards Ca2+ over Zn2+ was observed. The zinc complex was found to spontaneously undergo metal ion exchange in presence of Ca2+ yielding [Ca(L)2]2+.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2011.12.108