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Copper(I) complexes with 1-(2-carboxyphenyl)-5-heterylhydrazidinyl-6-celluloses as reversible redox indicators

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Abstract

A number of reagent test papers were designed on the basis of redox indicators: copper(I) complexes with sheet polydentate 1-(2-carboxyphenyl)-5-heterylhydrazidinyl-6-celluloses (I–IV) (heteryl = 6-methoxy-4-methylpyrimidin-2-yl, 4,6-dimethylpyrimidin-2-yl, benzoxazol-2-yl, and benzothiazol-2-yl). Complexes I–IV were transformed under the action of H2O2 into copper(II) complexes with 1-(2-carboxyphenyl)-5-heterylformazanyl-6-celluloses (V–VIII), respectively. When treated with Na2S, complexes V–VIII were reversibly reduced to the starting copper(I) complexes I–IV. The reactions were accompanied by bathochromic shifts from the central region of the visible spectrum to the higher wavelengths. Complex I was used to develop visual and reflectometric test methods for checking the peroxide content of pharmaceuticals and cosmetics at a level of 0.01% and above.

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Correspondence to G. A. Zvereva.

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Original Russian Text © V.M. Ostrovskaya, V.V. Minin, G.A. Zvereva, A.V. Tsygankov, N.N. Efimov, D.A. Man’shev, 2012, published in Koordinatsionnaya Khimiya, 2012, Vol. 38, No. 11, pp. 773–778.

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Ostrovskaya, V.M., Minin, V.V., Zvereva, G.A. et al. Copper(I) complexes with 1-(2-carboxyphenyl)-5-heterylhydrazidinyl-6-celluloses as reversible redox indicators. Russ J Coord Chem 38, 703–708 (2012). https://doi.org/10.1134/S107032841211005X

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  • DOI: https://doi.org/10.1134/S107032841211005X

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