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- W2059498862 abstract "The behavior of some nitrophenols and their sodium salts adsorbed on lithium, sodium, and potassium carbonates was studied. For each phenol, regular hypsochromic shifts of the wavelength maxima in the visible diffuse reflectance spectra of the two-component system were observed in order of decreasing size of the adsorbent cation whereas for the phenolic salts, essentially the same wavelength maxima were obtained over the three alkaline adsorbents. This phenomenon is interpreted in terms of polarization theory and the concept of “ionization” of the phenols on the surface of the basic adsorbents. A comparison of the reflectance spectra of the phenols and their sodium salts indicates that “ionization” or stretching of the hydrogen-oxygen bond in the phenol is not extensive in case of the three weakly acidic mononitrophenols on the three carbonates and is in the order Li2CO3 > Na2CO3 > K2CO3. The more acidic dinitro- and trinitrophenols are believed to exist on the basic adsorbents predominantly in the “ionized” form. Study of the relationship between acidity of the phenols and shift of wavelength maxima in their reflectance spectra on the adsorbents shows an increasing shift with increasing pK of the phenol." @default.
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- W2059498862 date "1965-10-01" @default.
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- W2059498862 title "Spectral reflectance studies of some nitrophenols and their salts on solid surfaces" @default.
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- W2059498862 doi "https://doi.org/10.1016/0021-9517(65)90158-2" @default.
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