Molecular-bond breaking induced by interatomic decay processes

Molecular-bond breaking induced by interatomic decay processes
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原子间衰变过程引起的分子键断裂

DOI:
10.1103/physreva.100.052701
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发表时间:
2019-11
期刊:
影响因子:
2.9
通讯作者:
Ying-Chih Chiang
Ying-Chih Chiang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Tsveta Miteva;Petra Votavová;Přemysl Kolorenč;Peng Bao;Selma Engin;Jiali Gao;Frank Otto;Nicolas Sisourat;Ying-Chih Chiang

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使用光子在分子中选择性地断裂键,为控制化学反应开辟了道路。我们在这里证明,一个分子的解离可以有效地实现第一次光激发相邻的原子或分子。在巨大的He−H2二聚体的例子中,我们证明了氦原子的同时电离和激发以很高的概率诱导H2解离。激发的He+离子通过原子间库仑衰变(ICD)或电子转移介导衰变(ETMD)将其多余的能量转移到H2,然后分别单或双电离。在这两种情况下,分子离子都会在几十飞秒内有效解离。ICD和ETMD诱导的分子键断裂有望成为普遍现象,这为标准光化学提供了替代方案。
Selective bond breaking in a molecule with the use of photons opens the way to control chemical reactions. We demonstrate here that dissociation of a molecule can be efficiently achieved by first photoexciting a neighboring atom or molecule. On the example of the giant He−H2 dimer, we show that simultaneous ionization and excitation of the helium atom induces H2 dissociation with a high probability. The excited He+ ion transfers its excess energy via interatomic Coulombic decay (ICD) or electron transfer mediated decay (ETMD) to H2 which is then singly or doubly ionized, respectively. In both cases, the molecular ion dissociates effectively within a few tens of femtoseconds. Molecular-bond breaking induced by ICD and ETMD are expected to be general phenomena, which provide alternatives to standard photochemistry.
DOI: 10.1063/1.465352
发表时间: 1993-07
影响因子: 4.4
作者:
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DOI: 10.1063/1.464348
发表时间: 1993-06-15
影响因子: 4.4
作者:
CEDERBAUM, LS;TARANTELLI, F
通讯作者: TARANTELLI, F