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键破裂的动力学诱导的外部值分子间库伦比衰变

Namitha Brijit Bejoy¹, Reman Kumar Singh¹, Nitin K Singh²

¹Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.

The journal of physical chemistry letters

|June 15, 2023

概括

研究人员首次在分子系统中观察到外部价值分子间库伦比衰变 (ICD). 这一由近紫外线触发的过程涉及能量转移和弱结合复合体中的电离.

科学领域:

物理化学物理化学
化学物理化学物理
分子动力学分子动力学

背景情况:

弱结合复合物的光刺激可以启动各种衰变途径.
分子间库伦体衰变 (ICD) 是一种放松过程,其中能量转移导致邻近分子的电离.
由于其在生物系统中的重要性,ICD正受到越来越多的关注.

研究的目的:

在分子系统中提供外部价值分子间库伦比衰变 (ICD) 的证据.
通过近紫外线辐射 (4.4 eV) 使用多光子激发诱导的ICD进行研究.
探索ICD在2,6-difluorophenylacetylene与阿里法胺二元复合物的动力学.

主要方法:

使用近紫外线辐射 (4.4 eV) 的多光子激发.
对氨基酸的转化能量分布特征的实验观测.
使用电子结构和初始分子动力学计算的计算分析.

主要成果:

在2,6-difluorophenylacetylene/aliphatic amine复合物中观察到外部价值ICD的证据.
在染色体上局部化的共振双光子激发启动了ICD,形成了氨基离子.
分析显示,在解离过程中,漫游动力学,甲基旋转器动力学和结合能量的复杂相互作用.

结论:

已经证明了以前在分子系统中未知的外价值ICD.
该研究阐明了这些二进制复合体中控制ICD的复杂动力学.
这一发现为了解分子系统中的能量转移和电离机制开辟了新的途径.

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