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COMPLEXATION OF “CROWNED” DINITROPHENYLAZOPHENOL WITH ALKALI AND ALKALINE EARTH METAL IONS AND ITS APPLICATION TO THE COLORIMETRIC DETERMINATION OF Rb(I) AND Cs(I)

Kenichiro Nakashima, Yûko Yamawaki, Shin’ichi Nakatsuji, Shuzo Akiyama, Takahiro Kaneda, Soichi Misumi

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Abstract

Abstract Complexation of “crowned” dinitrophenylazophenol (CDPA) with alkali and alkaline earth metal ions in CHCl3–MeOH–triethylamine was examined. The ionic radii of these metal ions correlated linearly both with the wave numbers of absorption maxima and with the molar absorption coefficients of the resulting complexes except for Be(II). The colorimetric determination of Rb(I) and Cs(I) by using CDPA was practical.

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Abstract Complexation of “crowned” dinitrophenylazophenol (CDPA) with alkali and alkaline earth metal ions in CHCl3–MeOH–triethylamine was examined. The ionic radii of these metal ions correlated linearly both with the wave numbers of absorption maxima and with the molar absorption coefficients of the resulting complexes except for Be(II). The colorimetric determination of Rb(I) and Cs(I) by using CDPA was practical.

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Available abstract

Abstract Complexation of “crowned” dinitrophenylazophenol (CDPA) with alkali and alkaline earth metal ions in CHCl3–MeOH–triethylamine was examined. The ionic radii of these metal ions correlated linearly both with the wave numbers of absorption maxima and with the molar absorption coefficients of the resulting complexes except for Be(II). The colorimetric determination of Rb(I) and Cs(I) by using CDPA was practical.

Key concepts: Chemistry, Alkaline earth metal, Alkali metal, Triethylamine, Ionic radius, Inorganic chemistry, Qualitative inorganic analysis, Ion

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COMPLEXATION OF “CROWNED” DINITROPHENYLAZOPHENOL WITH ALKALI AND ALKALINE EARTH METAL IONS AND ITS APPLICATION TO THE COLORIMETRIC DETERMINATION OF Rb(I) AND Cs(I) — Research Paper | ScholarLens