动力学
化学
甘氨酸
丙氨酸
热液循环
反应速率常数
水溶液
化学动力学
反应速率
惰性
无机化学
物理化学
氨基酸
化学工程
有机化学
生物化学
催化作用
物理
量子力学
工程类
作者
Jenny S. Cox,Terry M. Seward
标识
DOI:10.1016/j.gca.2007.01.020
摘要
Experimental data on the hydrothermal reaction kinetics of α-alanine, glycine, and β-alanine were acquired using a custom-built spectrophotometric reaction cell which permits in situ observation under hydrothermal conditions. Quantitative kinetic information, including rate constants, concentration versus time profiles, and calculations of the individual component spectra, was obtained from the data using a self-modeling chemometric approach based on factor analysis which treats the rate expressions simultaneously as a system of differential algebraic equations (DAE) of index 1. Experimental data collected at 120–165 °C and 20 bar indicates that aqueous α-alanine, glycine and β-alanine will preferentially undergo dimerization and subsequent cyclization when heated in an inert reactor. The results presented here lend further support to the roles of temperature, exposed reactive surfaces, and matrix additives in the reaction kinetics of the structurally simple amino acids examined in this study.
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