Photodissociation dynamics of methyl iodide across the A-band probed by femtosecond extreme ultraviolet photoelectron spectroscopy
Photodissociation dynamics of methyl iodide across the A-band probed by femtosecond extreme ultraviolet photoelectron spectroscopy
复制标题
飞秒极紫外光电子能谱探测甲基碘在 A 波段的光解离动力学
DOI:
10.1088/1361-6455/ac08f3
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Downes-Ward B
中科院分区:
文献类型:
--
作者:
Downes-Ward B
The dissociation dynamics of CH 3 I at three UV pump wavelengths (279 nm, 254 nm, 243 nm) are measured using an extreme ultraviolet probe in a time-resolved photoelectron spectroscopy experiment. The results are compared with previously published data at a pump wavelength of 269 nm,[2020, Phys. Chem. Chem. Phys., 22, 25695], with complementary photoelectron spectroscopy experiments performed using a multiphoton ionization (MPI) probe [2019, Phys. Chem. Chem. Phys., 21, 11142] and with the recent action spectroscopy measurements of Murillo-Sánchez et al [2020, J. Chem. Phys., 152, 014304]. The measurements at 279 nm and 243 nm show signals that are consistent with rapid dissociation along the C–I bond occurring on timescales that are consistent with previous measurements. The measurements at 254 nm show a significantly longer excited state lifetime with a secondary feature appearing after 100 fs which is indicative of more complex dynamics in the excited state. The time-dependence of the changes are consistent with the previously measured MPI photoelectron spectroscopy measurements of Warne et al,[2019, Phys. Chem. Chem. Phys., 21, 11142]. The consistency of the signal appearance across ionization processes suggests that the extended observation time at 254 nm is not an artefact of the previously used MPI process but is caused by more complex dynamics on the excited state potential. Whether this is caused by complex vibrational dynamics on the dominant 3 Q 0 state or is due to enhanced population and dynamics on the 1 Q 1 state remains an open question.
登录
查看更多内容
DOI:
10.1063/1.4998648
发表时间:
2018-01
期刊:
Structural dynamics (Melville, N.Y.)
影响因子:
--
作者:
Amini K;Savelyev E;Brauße F;Berrah N;Bomme C;Brouard M;Burt M;Christensen L;Düsterer S;Erk B;Höppner H;Kierspel T;Krecinic F;Lauer A;Lee JWL;Müller M;Müller E;Mullins T;Redlin H;Schirmel N;Thøgersen J;Techert S;Toleikis S;Treusch R;Trippel S;Ulmer A;Vallance C;Wiese J;Johnsson P;Küpper J;Rudenko A;Rouzée A;Stapelfeldt H;Rolles D;Boll R
通讯作者:
Boll R
影响因子:
8.6
作者:
Smith AD
通讯作者:
Smith AD
DOI:
10.1063/1.3650718
发表时间:
2011
期刊:
The Journal of chemical physics
影响因子:
--
作者:
A. García;R. Nalda;J. Durá;J. González;L. Bañares
通讯作者:
L. Bañares
DOI:
10.1063/1.3236808
发表时间:
2009-10
期刊:
The Journal of chemical physics
影响因子:
--
作者:
J. Durá;R. de Nalda;G. Amaral;L. Bañares
通讯作者:
J. Durá;R. de Nalda;G. Amaral;L. Bañares
影响因子:
4.4
作者:
BAUGHCUM, SL;LEONE, SR
通讯作者:
LEONE, SR