Chemical activation of oxygen molecule by quantum electronic state selected vanadium cation: observation of spin–orbit state effects
Chemical activation of oxygen molecule by quantum electronic state selected vanadium cation: observation of spin–orbit state effects
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量子电子态选择钒阳离子对氧分子的化学活化:自旋轨道态效应的观察
DOI:
10.1080/00268976.2020.1767309
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发表时间:
2021
影响因子:
1.7
通讯作者:
Ng, Cheuk-Yiu
中科院分区:
文献类型:
--
作者:
Chang, Yih Chung;Xu, Yuntao;Xiong, Bo;Ng, Cheuk-Yiu
By employing two-colour laser pulsed field ionisation-photoion (PFI-PI) double-quadrupole-double-octopole ion-molecule apparatus, we have examined the absolute integral cross-section (σ) for the reaction between vanadium cation (V+) and oxygen molecule (O2), covering the centre-of-mass kinetic energy (Ecm) range of 0.2–10.0 eV. Here, V+ion was prepared exclusively in its lowest 13 spin–orbit or J-states, a5DJ=0-4, a5FJ=1-5, and a3FJ=2-4. The formation of VO++ O is identified as the only product channel for these exothermic reactions. AtEcm= 0.2–5.0 eV, the σ values for the three electronic states are found to be in the order: σ(a3FJ) > σ(a5DJ) > σ(a5FJ), whereas these cross-sections become nearly identical atEcm= 5.0–10.0 eV. This observation has been rationalised by collision-mediated non-adiabatic electronic transitions. The J-state effect for the V+(a3F2, 3)+ O2reactions are unambiguously identified for the first time for a reaction involving a transition metal cation. This J-state dependent chemical reactivity observed calls for rigorous theoretical interpretation. The fact that chemical reactivity for the a5FJexcited state is lower than that for the a5DJground state indicates that the difference in chemical reactivity is originated from quantum-electronic-state instead of energy effects.
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影响因子:
56.9
作者:
Harris, Eliza;Sinha, Baerbel;Herrmann, Hartmut
通讯作者:
Herrmann, Hartmut
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
E. Murad
通讯作者:
E. Murad
DOI:
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发表时间:
2018
期刊:
影响因子:
--
作者:
Zhihong Luo;Y. Chang;C. Lam;K. Lau;C. Ng
通讯作者:
C. Ng
DOI:
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发表时间:
2003
期刊:
影响因子:
--
作者:
X. Zhang;P. Armentrout
通讯作者:
P. Armentrout
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
J. Elkind;P. Armentrout
通讯作者:
P. Armentrout