Wlodarczyk P, Kaminski K, Paluch M, Ziolo J
Institute of Physics, Silesian University, Katowice, Poland.
J Phys Chem B. 2009 Apr 2;113(13):4379-83. doi: 10.1021/jp8095902.
Broadband dielectric spectroscopy was employed to investigate the kinetics of the mutarotation of D-fructose. In this article, D-fructose tautomerization behavior in pure melt is revealed. By monitoring structural relaxation time shift, we were able to determine speed in temperature range 303-333 K and the activation energy for this phenomenon. It is equal to 107 kJ/mol, which is very high in comparison to the solvated system. We have also shown the influence of this process to the gamma-relaxation (secondary relaxation process). Dielectric spectroscopy derived complex information about mutarotational dynamics.
采用宽带介电谱研究了D-果糖变旋的动力学。本文揭示了纯熔体中D-果糖的互变异构行为。通过监测结构弛豫时间的变化，我们能够确定303 - 333 K温度范围内的速度以及该现象的活化能。其值为107 kJ/mol，与溶剂化体系相比非常高。我们还展示了这个过程对γ弛豫（二级弛豫过程）的影响。介电谱得出了关于变旋动力学的复杂信息。
