Abstract
Three types of flavylium salts (FVs, yellow, green and red) have been synthesized and the colors depended on recrystallization conditions. The existence of these color states was confirmed by diffuse reflectance spectra. The spectra were almost the same as the absorption spectra in ethanol solution. The molecular state of FVs in crystals will be the same as that in solutions. The crystal colors of the FVs are controlled by the recrystallization conditions.
REFERENCES
R. Brouillard, in: The Flavonoids, Advances in Research, J. B. Harborne (Ed.). Chapman and Hall, London (1988).
Y. Yoshida, T. Kondo, Y. Okazaki and K. Kato, Nature 373, 291 (1995).
P. Figueiredo, J. C. Lima, H. Santos, M. C. Wigand, R. Brouillrad, A. L. Macanita and F. Pina, J. Am. Chem. Soc. 116, 1249 (1994).
R. Matsushima, K. Miyakawa and M. Nishihata, Chem. Lett., 1915 (1998).
R. Matsushima and M. Suzuki, Bull. Chem. Soc. Jpn. 65, 39 (1992).
H. Horiuchi, A. Yokawa, T. Okutsu and H. Hiratsuka, Bull. Chem. Soc. Jpn. 72, 2429 (1999).
R. Matsushima, H. Okuda, M. Aida and A. Ogiue, Bull. Chem. Soc. Jpn. 74, 2295 (2001).
F. Ito, N. Tanaka, A. Katsuki and T. Fujii, J. Photochem. Photobiol. A 105, 155 (2002).
E. Büllow and H. Wagner, Ber. Dtsch. Chem. Ges. 34, 1782 (1901).
M. Jeremic, R. Herak, J. Jecny, B. Prelesnik and S. Ristic, Jug. Cent. Krist. 11, 117 (1976).
C. Michaelis and R. Wizinger, Helv. Chim. Acta 34, 1761 (1951).
F. Ito, N. Tanaka, A. Katsuki and T. Fujii, J. Photochem. Photobiol. A 161, 111 (2004).
R. Matsushima, A. Ogiue and Y. Kohno, Chem. Lett., 436 (2002).
Rights and permissions
About this article
Cite this article
Ito, F., Tanaka, N., Katsuki, A. et al. Synthesis and characterization of flavylium salts having three types color depending on recrystallization conditions. Research on Chemical Intermediates 30, 331–336 (2004). https://doi.org/10.1163/1568567041257599
Issue Date:
DOI: https://doi.org/10.1163/1568567041257599