论文部分内容阅读
在用激光多光子分解法分离同位素氘的过程中,工作分子的再氘化是允许工作分子再使用的基础。实现再氘化最简单的方法是通过与天然水的同位素化学交换。因此,研究工作分子的H/D交换动力学及适当地选择催化剂和交换介质是当前十分必要和活跃的领域。本文研究了CF_3CDCl_2与H_2O的均相碱催化H/D同位素交换动力学。我们用红外测试法测定CF_3CDCl_2浓度的方法追踪动力学过程。结果表明这是一个复杂反应,正向反应为二级反应。测定了273.15和289.65K的速度常数分别为3.50×10~(-3)和3.13×10~(-2)[mol/l]~(-1)S~(-1)。求出其表观活化能为87.3kJ。根据我们提出的反应机理:
In the separation of isotope deuterium by laser photoplethysmography, deuteration of the working molecule is the basis for allowing the working molecule to be reused. The easiest way to achieve deuteration is through chemical exchange with isotopes of natural water. Therefore, it is currently an extremely necessary and active field to study the H / D exchange kinetics of the workmen and to properly select catalysts and exchange media. In this paper, the homogeneous phase base catalyzed H / D isotope exchange kinetics of CF_3CDCl_2 and H_2O was studied. We tracked the kinetics using a method of infrared measurement of the CF_3CDCl_2 concentration. The results show that this is a complex reaction, the forward reaction is a secondary reaction. The velocity constants of 273.15 and 289.65 K were determined to be 3.50 × 10 -3 and 3.13 × 10 -2 (mol / l) -1, respectively. The apparent activation energy was found to be 87.3kJ. According to our proposed reaction mechanism: