首页> 外文期刊>Molecular physics >Investigation into the Gaussian time-dependence of the rate coefficient in dispersive kinetic models applied to simple gas-phase chemical reactions
【24h】

Investigation into the Gaussian time-dependence of the rate coefficient in dispersive kinetic models applied to simple gas-phase chemical reactions

机译:应用于简单气相化学反应的色散动力学模型中速率系数的高斯时间依赖性研究

获取原文
获取原文并翻译 | 示例
           

摘要

Dispersive kinetic models (DKMs) based on the concept of a distribution of activation energies have shown much promise in describing complex reaction transients. In particular, DKMs exhibiting a time (t)-dependent rate coefficient, k, of approximately Gaussian functional form provide the most insight into the kinetics because they do not rely on unit-less, empirical parameters [P.J. Skrdla, J. Phys. Chem. A 113, 9329 (2009)]. The physical basis of the Gaussian behaviour is investigated using a dispersive simple harmonic oscillator (DSHO) description ofMarcus-type reactions studied on the ultrafast timescale. The DSHO description is found to support the Gaussian t-dependence of k over relatively short time periods. Moreover, in cases where the transition state survives more than one vibration of the predominant reactive mode, a periodicity in k is observed that is also consistent with empirical observations.
机译:基于活化能分布概念的色散动力学模型(DKM)在描述复杂的反应瞬变方面显示出很大的希望。特别是,表现出与时间(t)相关的近似高斯函数形式的速率系数k的DKM提供了对动力学的最深入了解,因为它们不依赖于无单位的经验参数。 Skrdla,J.Phys。化学A 113,9329(2009)]。高斯行为的物理基础是使用色散简单谐波振荡器(DSHO)描述了在超快时标上研究的马库斯型反应的。发现DSHO描述在相对较短的时间段内支持k的高斯t相关性。此外,在过渡态经受住主要反应模式的一个以上振动的情况下,观察到k的周期性也与经验观察一致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号