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Photofragmentation dynamics of N,N-dimethylformamide following excitation at 193 nm

机译:193nm激发后N,N-二甲基甲酰胺的照相动力学

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摘要

N,N-dimethylformamide, HCON(CH3)(2), is a useful model compound for investigating the peptide bond photofragmentation dynamics. We report data from a comprehensive experimental and theoretical study into the photofragmentation dynamics ofN,N-dimethylformamide in the gas phase at 193 nm. Through a combination of velocity-map imaging and hydrogen atom Rydberg tagging photofragment translational spectroscopy we have identified two primary fragmentation channels, namely, fission of theN-CO"peptide" bond andN-CH3 bond fission leading to the loss ofCH(3). The possible fragmentation channels leading to the observed products are rationalised with recourse to CASPT2 calculations of the ground and first few excited-state potential energy curves along the relevant dissociation coordinates, and the results are compared with the data from previous experimental and theoretical studies on the same system. Published by AIP Publishing.
机译:N,N-二甲基甲酰胺,HCON(CH3)(2),是用于研究肽键光量沉积动态的有用的模型化合物。 我们向193nm处的气相中的综合实验和理论研究报告了进入的全面实验和理论研究的数据,在气相中的气相中。 通过速度 - 地图成像和氢原子rydberg标记的光反增镜平移光谱学,我们已经确定了两个初级碎裂通道,即当时-Co“肽”键AndN-CH3键合的裂变,导致OFCH(3)的损失。 导致观察到的产品的可能碎片通道通过求助于地面的Caspt2计算,以及沿着相关解离坐标的前几个激励状态电位能曲线,并将结果与来自先前实验和理论研究的数据进行比较 相同的系统。 通过AIP发布发布。

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