Quantum-state resolved lifetime of triplet (ã3A2) formaldehyde
Quantum-state resolved lifetime of triplet (ã3A2) formaldehyde
复制标题
三重态 (aÌ3A2) 甲醛的量子态解析寿命
DOI:
10.1016/j.jms.2019.06.001
复制
发表时间:
2019
影响因子:
1.4
通讯作者:
G. B. Park
中科院分区:
文献类型:
--
作者:
B. C. Krüger;T. Schäfer;A. M. Wodtke;G. B. Park
We report state-resolved lifetimes of formaldehyde in the first excited triplet a ̃ 3 A 2 electronic state. Pump-laser excitation within 2800 cm− 1 of the triplet origin is followed by variably delayed F 2-laser ionization. Lifetimes fluctuate from> 100 μ s to∼ 100 ns and a large isotope effect is observed. The average decay rate increases exponentially with increasing vibrational energy above the electronic origin, consistent with a mechanism involving tunneling through the barrier on the electronic ground state to the CO+ H 2/D 2 continuum. By accessing the triplet state we are able to investigate the molecular elimination reaction down to∼ 25 kJ/mol below the zero-point-energy corrected activation barrier. A model based on empirical RRKM rates allows the intersystem crossing matrix elements to be estimated. The T 1–S 0 intersystem crossing matrix elements are comparable to the S 1–S 0 internal conversion matrix elements observed at similar vibrational excitation.
登录
查看更多内容
DOI:
10.1063/1.3085952
发表时间:
2009-03
期刊:
The Journal of chemical physics
影响因子:
--
作者:
Peng Zhang;S. Maeda;K. Morokuma;B. Braams
通讯作者:
Peng Zhang;S. Maeda;K. Morokuma;B. Braams
DOI:
10.1063/1.4948635
发表时间:
2016
期刊:
The Journal of chemical physics
影响因子:
--
作者:
G. B. Park;Bastian C. Krüger;S. Meyer;D. Schwarzer;Tim Schäfer
通讯作者:
Tim Schäfer
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
B. A. Waite;S. Gray;W. Miller
通讯作者:
W. Miller
DOI:
--
发表时间:
1958
期刊:
影响因子:
--
作者:
G. Robinson;V. DiGiorgio
通讯作者:
V. DiGiorgio
DOI:
--
发表时间:
1958
期刊:
影响因子:
--
作者:
S. E. Hodges;J. Henderson;J. B. Coon
通讯作者:
J. B. Coon