Russian Journal of Electrochemistry

, Volume 42, Issue 11, pp 1169–1176

New acetophenone-functionalized thiophene monomer for conducting films on electrodes in chemical ion-sensorics: The synthesis and spectroelectrochemical study

  • J. Tarábek
  • E. Jähne
  • P. Rapta
  • D. Ferse
  • H. -J. Adler
  • L. Dunsch
Article

Abstract

A new acetophenone-functionalized thiophene monomer, 2-hydroxy-6-[2-(thiophene-3-yl)ethoxy]acetophenone, is synthesized by the reaction of 2.6-dihydroxyacetophenone with 2-(thiophene-3-yl)ethane-1-ol under mild conditions. The synthesis is performed in order to study its electrochemical oxidation and prepare a functionalized conducting material for ion sensors with a receptor group for divalent heavy-metal cations. The redox behavior of the functionalized thiophene is studied by simultaneous in situ ESR and Vis-NIR spectroscopy. The formation of soluble thiophene oligomeric structures during the electrochemical oxidation of the monomer is found. Direct evidence for the formation of oligomers is given by ex situ MALDI-TOF and LDI-TOF mass spectrometry. The acetophenone-functionalized monomer and 3-methylthiophene are electrochemically copolymerized and the copolymeric nature of the product is proved by MALDI-TOF mass spectrometry as well. The copolymer film at the electrode surface is characterized in its redox behavior.

Key words

functionalized thiophene synthesis electrochemical oligomerization ESR/Vis-NIR spectroscopy MALDI-TOF mass spectrometry copolymer 

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Copyright information

© MAIK “Nauka/Interperiodica” 2006

Authors and Affiliations

  • J. Tarábek
    • 1
    • 4
  • E. Jähne
    • 2
  • P. Rapta
    • 3
    • 4
  • D. Ferse
    • 2
  • H. -J. Adler
    • 2
  • L. Dunsch
    • 4
  1. 1.Heyrovský Institute of Physical ChemistryPrague 8Czech Republic
  2. 2.Institute for Macromolecular and Textile ChemistryDresden University of TechnologyDresdenGermany
  3. 3.Slovak University of TechnologyBratislavaSlovak Republic
  4. 4.Leibniz Institute for Solid State and Materials ResearchDresdenGermany

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