Abstract
Patterns in the adsorption of α-tocopherol on acid-activated clinoptilolite tuff at 283, 295, 305, and 333 K are established and explained. It is found that the selectivity of the sorbent toward the vitamin rises as the temperature of the process falls. The adsorption of α-tocopherol from dilute solutions is described in terms of the Langmuir adsorption theory. It is shown that the fixing of vitamin E monolayers in the structural matrix of clinoptilolite tuff is due to the formation of hydrogen bonds between isolated silanol groups of the adsorbent and oxygen atoms of the chromane ring and the phenol residue of α-tocopherol. The thermodynamic functions of monolayer adsorption of the vitamin are estimated. It is concluded that the formation of polymolecular layers in the form of associates is due to hydrophobic interactions between side substituents of α-tocopherol.
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References
E. Titus, A. K. Kalkar, and V. G. Gaikar, Colloids Surf. A: Physicochem. Aspects 223, 55 (2003).
N. N. Vlasova and L. P. Golovkova, Colloid. J. 66, 657 (2004).
G. A. Kovalenko, Pharm. Chem. J. 34(6), 45 (2000).
O. N. Slavinskaya, I. V. Laguta, and P. A. Kuzema, Russ. J. Phys. Chem. A 80, 1305 (2006).
M. Hartmann and G. Chandrasekar, Chem. Mater., No. 17, 829 (2005).
H. K. Beyer, Mol. Sieves: Sci. Technol. 3, 203 (2002).
E. A. Cristine, Astrobiology 11, 409 (2011).
Y. Garcia-Basabe, I. Rodriguez-Iznaga, M. Louis-Charles, et al., Micropor. Mesopor. Mater. 135, 187 (2010).
F. Cakicioglu-Ozkan and S. Ulku, Micropor. Mesopor. Mater. 77, 47 (2005).
N. K. Nadirov, Tocopherols and their Use in Medicine and Agriculture (Nauka, Moscow, 1991) [in Russian].
Yu. A. Cherenkova, D. L. Kotova, T. A. Krysanova, et al., Sorbtsion. Khromatogr. Protsessy 9, 515 (2009).
D. L. Kotova, Do Tkhi Long, T. A. Krysanova, and V. F. Selemenev, Russ. J. Phys. Chem. A 85, 2209 (2011).
D. L. Kotova, Do Tkhi Long, T. A. Krysanova, et al., Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol. 55(4), 100 (2012).
D. L. Kotova, S. Yu. Vasilyeva, T. A. Krysanova, and A. V. Zenishcheva, Colloid. J. 75, 84 (2013).
Biochemical Thermodynamics, Ed. by M. Jones (Elsevier, New York, 1979; Mir, Moscow, 1982).
K. Nakanisi, Infrared Absorption Spectroscopy (Holden-Day, San Francisco, Tokyo 1962).
M. Sow and G. Durocher, J. Photochem. Photobiol. A: Chem. 54, 349 (1990).
V. A. Bidzilya, L. P. Golovkova, N. N. Vlasova, et al., Ukr. Khim. Zh. 60, 616 (1994).
Yu. G. Frolov, Manual on Colloid Chemistry: Surface Phenomena and Disperse Systems (Khimiya, Moscow, 1988) [in Russian].
B. S. Chu and B. S. Baharin, J. Food Eng. 62, 97 (2004).
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Original Russian Text © D.L. Kotova, S.Yu. Vasilyeva, T.A. Krysanova, 2014, published in Zhurnal Fizicheskoi Khimii, 2014, Vol. 88, Nos. 7–8, pp. 1223–1227.
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Kotova, D.L., Vasilyeva, S.Y. & Krysanova, T.A. Influence of temperature on the adsorption of α-tocopherol from ethanol solutions on acid-activated clinoptilolite tuff. Russ. J. Phys. Chem. 88, 1403–1407 (2014). https://doi.org/10.1134/S0036024414080147
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DOI: https://doi.org/10.1134/S0036024414080147