| Autor: |
Allum, Felix, Burt, Michael, Amini, Kasra, Boll, Rebecca, Köckert, Hansjochen, Olshin, Pavel K., Bari, Sadia, Bomme, Cédric, Brauße, Felix, Cunha de Miranda, Barbara, Düsterer, Stefan, Erk, Benjamin, Géléoc, Marie, Geneaux, Romain, Gentleman, Alexander S., Goldsztejn, Gildas, Guillemin, Renaud, Holland, David M. P., Ismail, Iyas, Johnsson, Per |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 11/28/2018, Vol. 149 Issue 20, pN.PAG-N.PAG, 10p, 3 Color Photographs, 1 Chart, 6 Graphs |
| Abstrakt: |
The photodissociation dynamics of CH3I and CH2ClI at 272 nm were investigated by time-resolved Coulomb explosion imaging, with an intense non-resonant 815 nm probe pulse. Fragment ion momenta over a wide m/z range were recorded simultaneously by coupling a velocity map imaging spectrometer with a pixel imaging mass spectrometry camera. For both molecules, delay-dependent pump-probe features were assigned to ultraviolet-induced carbon-iodine bond cleavage followed by Coulomb explosion. Multi-mass imaging also allowed the sequential cleavage of both carbon-halogen bonds in CH2ClI to be investigated. Furthermore, delay-dependent relative fragment momenta of a pair of ions were directly determined using recoil-frame covariance analysis. These results are complementary to conventional velocity map imaging experiments and demonstrate the application of time-resolved Coulomb explosion imaging to photoinduced real-time molecular motion. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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