Abstract
A study of the nature of electronic transitions in different structural forms of pyridoxine hydrochloride molecule shows that the maxima in experimental absorption spectra at wavelengths 244 ± 1 nm, 310 ± 1 nm (pH 12.5), 291 ± 1 nm (pH 1.1, pH 4.1), 258 ± 1 nm, 291 ± 1 nm, and 324 ± 1 nm (pH 4.15) are, along with the corresponding lines in theoretical spectra, due to electron transitions from occupied molecular p-orbitals localized on the nitrogen atoms in the structure of pyridine rings to the vacant p-orbitals of double C=N bonds.
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Original Russian Text © E.A. Illarionova, A.I. Illarionov, O.L. Nikonovich, 2017, published in Izvestiya Rossiiskoi Akademii Nauk, Seriya Fizicheskaya, 2017, Vol. 81, No. 10, pp. 1410–1413.
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Illarionova, E.A., Illarionov, A.I. & Nikonovich, O.L. UV absorption spectra and the physical nature of the optical properties of pyridoxine hydrochloride. Bull. Russ. Acad. Sci. Phys. 81, 1269–1272 (2017). https://doi.org/10.3103/S1062873817100136
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DOI: https://doi.org/10.3103/S1062873817100136