Abstract
Porphyrins and related compounds (metalloporphyrins, phthalocyanines, etc.), owing to their unique complexing properties, are used ever more frequently as membrane-active components in membranes of ion-selective electrodes. The work examines electrochemical properties of membranes containing tetraphenylporphyrins (TPP) of metals of group IIIB of the periodic table (Al, Ga, In, Tl) and solvents-plasticizers of various nature, specifically, esters of phthalic, adipic, and sebacic acids and orthonitrophenyloctyl ether. The nature of the central atom of the metal determines the character of dependence of E on pH of solutions under study; it also defines the decrease in the slope of the SCN– function occurring in the series AlTPP → TlTPP and the change in the function sign for membranes containing TlTPP. For all the membranes, the selectivity sequences are determined by the method of individual solutions. The variation in K sel in the series Al → Tl conforms to the other derived characteristics.
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Valiotti, A.B., Shumilova, G.I. & Zaitseva, A.V. Electrochemical Properties of Membranes Based on Complexes Tetraphenylporphyrin–Ions of Group IIIB Metals (Al, Ga, In, Tl). Russian Journal of Electrochemistry 37, 95–101 (2001). https://doi.org/10.1023/A:1009040031155
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DOI: https://doi.org/10.1023/A:1009040031155