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Thiocyanate and fluoride electrochemical sensors based on nanostructurated metalloporphyrin systems

D. VLASCICI1, E. MARIA PICA2, E. FAGADAR-COSMA3, V. COSMA2,* , O. BIZEREA1

Affiliation

  1. West University of Timisoara, Faculty of Chemistry-Biology-Geography, Inorganic Chemistry Department 16. Pestalozzi Street, 300115 Timisoara, Romania
  2. Technical University of Cluj-Napoca, Faculty of Science and Materials Engineering, 15 Constantin Daicoviciu Street, 400020 Cluj-Napoca, Romania
  3. Institute of Chemistry Timisoara of Romanian Academy, 24 M Viteazul Ave, 300223-Timisoara, Romania

Abstract

Metalloporphyrins such as Rh(III)TPPCl and Zr(IV)TPPCl2 [1] were used as ionophores to prepare nanostructurated polymeric membrane sensors for thiocyanate and fluoride. Results from potentiometric experiments suggest the optimal membrane composition with these molecular systems [2] which is essential to improve the selectivity and the stability of the potentiometric response of the sensors. Sensors prepared exhibit rapid, fully reversible and Nernstian response towards thiocyanate and fluoride, in the large concentration range Two functional model of the sensors with internal solid contact and internal liquid (filling solution) contact were elaborated and tested. Their optimal construction is simple and robust enough. The sensors were successfully tested for monitoring thiocyanate and fluoride..

Keywords

Thiocyanate, Fluoride, Metalloporphyrins, Ion – selective electrodes, Internal solid contact, Internal filling solution contact.

Submitted at: Feb. 25, 2008
Accepted at: Aug. 28, 2008

Citation

D. VLASCICI, E. MARIA PICA, E. FAGADAR-COSMA, V. COSMA, O. BIZEREA, Thiocyanate and fluoride electrochemical sensors based on nanostructurated metalloporphyrin systems, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 9, pp. 2303-2306 (2008)