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UDK: 544.02

2016. - V. 30. - N 6(175). - P. 62-64

Ilya Andreevich Shestakov, Alexandra Olegovna Mariyanac, Olga Sergeevna Gorshkova, Ko Ko Htun Ye, Alexey Borisovich Sazonov,

THERMODYNAMIC ISOTOPE EFFECTS OF TRITIUM IN CARBOHYDRATE MOLECULES

Distribution of tritium between water and carbohydrates (glucose, fructose, ribose, and deoxyribose) in their aqueous solutions at 293 K has been studied with equilibrium evaporation technique. Dynamics of activity loss shows water in dilute solutions being in two different forms, free and bound water. Distribution of tritium moved towards bound water. Constants of isotope equilibrium between free water and carbohydrate molecules are within a range from ~2 to ~3, i.e. in all cases carbohydrates are enriched with tritium. Results of quantum statistics calculations using molecule force fields obtained within semiempirical methods AM1 and PM3 are in agreement with experimental data.

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Термодинамические изотопные эффекты трития в молекулах углеводов

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Keywords

bound water   carbohydrate solutions   deoxyribose   free water   fructose   glucose   isotope equilibrium constant   mass distribution ratio   ribose   tritium   глюкоза   дезоксирибоза   константа равновесия реакции изотопного обмена   массовый коэффициент распределения   растворы углеводов   рибоза   свободная вода   связанная вода   тритий   фруктоза  


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