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Thiophene-based electrochemically active probes for selective calcium detection

Authors
  • Sahli, Rihab
  • Raouafi, Noureddine
  • Maisonhaute, Emmanuel
  • Boujlel, Khaled
  • Schöllhorn, Bernd
Publication Date
Jan 01, 2012
Source
HAL-UPMC
Keywords
Language
English
License
Unknown
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Abstract

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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