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Laboratoire d'Electrochimie Moleculaire, LEM, Paris

UMR CNRS - Université Paris Diderot - Paris France

   
 
Master Frontiers in Chemistry | UFR de Chimie - Université Paris Diderot - Paris 7 CNRS - Institut de chimie Université de Paris Master Chimie Sorbonne Paris Cité UFR de Chimie - Université Paris Diderot - Paris 7 CNRS - Institut de chimie
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Université Paris Diderot
Université de Paris CNRS, Centre National de la Recherche Scientifique
 
 


Le LEM - Publications: Abstracts

Publication 700

Electrochimica Acta, 63 (19),228-231, 2012
DOI: 10.1016/j.electacta.2011.12.108
 

doi

Thiophene-based electrochemically active probes for selective calcium detection

Rihab Sahlia, Noureddine Raouafia, Emmanuel Maisonhaute, Khaled Boujlela, Bernd Schöllhorn

Laboratoire de Chimie Analytique et d’Electrochimie, Département de Chimie, Faculté des Sciences de Tunis, Université de Tunis El-Manar, 2092 Tunis El-Manar, Tunisia - Laboratoire d’Electrochimie Moléculaire, UMR CNRS 7591, Université Paris Diderot, 15 rue Jean-Antoine de Baïf, 75205 Paris Cedex 13, France - Laboratoire Interfaces et Systêmes Electrochimiques, UPR 15 du CNRS, Université Pierre et Marie Curie Paris 06, Case Courrier no. 133, 4 place Jussieu, 75252 Paris Cedex 05, France - Laboratoire “Pasteur” UMR CNRS 8640, Ecole Normale Supérieure, Université Pierre et Marie Curie-Paris 6, 24 rue Lhomond, 75231 Paris Cedex 05, France

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 911 mV. 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+.

 
   
 
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