Spectrophotometric investigations of protonated forms of heterocyclic compounds
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2,4,6-trimethylpyridine, quinoline, 2-methylquinoline, 4-chlorine-2-methylquinoline, and acridine aromatic heterocycles, as well as protonated forms thereof, are studied by electronic absorption spectroscopy in solution. The influence of protonation on the electronic absorption spectra of heterocycles consists in a long-wavelength shift of the absorption spectrum in comparison with the absorption of initial molecules. The spectra of the protonated forms of all compounds exhibit a relative increase in the intensity of the long-wavelength absorption band compared to the short-wavelength band and a smearing of the vibrational structure in the long-wavelength band.
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- 1.Hydrogen-Transfer Reactions, Ed. by J. T. Hynes, J. P. Klinman, H. H. Limbach, and R. L. Schowen (Wiley-VCH, Weinheim, 2007), Vol. 1–4.Google Scholar
- 10.M. V. Vener, S. Kong, A. A. Levina, and I. G. Shenderovich, Acta Chim. Slov. 58, 402 (2011).Google Scholar
- 18.G. S. Denisov, V. A. Mikheev, A. B. Sokornov, T. V. Sokornova, B. S. Terushkin, and V. M. Shraiber, Zh. Prikl. Spektrosk. 42(1), 66 (1985).Google Scholar
- 19.T. G. Meister and V. P. Klindukhov, in Hydrogen Bond (Nauka, Moscow, 1981), p. 39 [in Russian].Google Scholar
- 20.R. N. Nurmukhametov, Absorption and Luminescence of Aromatic Compounds (Khimiya, Moscow, 1971) [in Russian].Google Scholar
- 21.E. Stern and C. Timmons, Gillam and Stern’s Introduction to Electronic Spectroscopy in Organic Chemistry (Arnold, London, 1970; Mir, Moscow, 1974).Google Scholar
- 23.J. N. Murrell, The Theory of the Electronic Spectra of Organic Molecules (Chapman and Hall, London, 1971).Google Scholar