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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Observation of Proton Transfer in 2-Aminopyridine Dimer by Electron and Mass Spectroscopy
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Observation of Proton Transfer in 2-Aminopyridine Dimer by Electron and Mass Spectroscopy

机译：电子和质谱观察2-氨基吡啶二聚体中的质子转移

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摘要

A photoinitiated intermolecular electron-proton transfer reaction in 2-aminopyridine dimer was investigated by femtosecond pump-probe electron-ion coincidence spectroscopy and accompanying theory. Excited-state population dynamics were observed in real time by time-resolved mass spectroscopy, and the respective excited-state character of locally excited and proton/hydrogen transfer states was identified in coincident electron spectra. Two reaction channels for an ultrafast (sub-50 fs) and a slower (～75 ps) proton/hydrogen transfer were observed and indicate that vibrational energy redistribution may lead to efficient population trapping in the excited state. Spectroscopic evidence of an unexpected hydrogen-transfer reaction in photoexcited aminopyridine monomer is also presented.
机译：飞秒泵浦探针电子离子符合光谱法和伴随理论研究了2-氨基吡啶二聚体中的光引发分子间电子-质子转移反应。通过时间分辨质谱实时观察激发态的种群动态，并在一致的电子光谱中鉴定出局部激发态和质子/氢转移态的各自激发态特征。观察到两个超快（低于50 fs）和较慢（〜75 ps）质子/氢转移的反应通道，这表明振动能的重新分布可能导致激发态下有效的人口陷阱。还提出了在光激发的氨基吡啶单体中发生意外氢转移反应的光谱学证据。

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