Photodissociation dynamics of pyrimidine

The Journal of Chemical Physics
Ming-Fu LinChi-Kung Ni

Abstract

Photodissociation of pyrimidine at 193 and 248 nm was investigated separately using vacuum ultraviolet photoionization at 118.4 and 88.6 nm and multimass ion imaging techniques. Six dissociation channels were observed at 193 nm, including C4N2H4 --> C4N2H3 + H and five ring opening dissociation channels, C4N2H4 --> C3NH3 + HCN, C4N2H4 --> 2C2NH2, C4N2H4 --> CH3N + C3NH, C4N2H4 --> C4NH2 + NH2, and C4N2H4 --> CH2N + C3NH2. Only the first four channels were observed at 248 nm. Photofragment translational energy distributions and dissociation rates indicate that dissociation occurs in the ground electronic state after internal conversion at both wavelengths. The dissociation rates were found to be >5 x 10(7) and 1 x 10(6) s(-1) at 193 and 248 nm, respectively. Comparison with the potential energies from ab initio calculations have been made.

References

Apr 11, 2002·Journal of the American Chemical Society·Chih-Kai LinChi-Kung Ni
Aug 9, 2003·Journal of the American Chemical Society·Cheng-Liang HuangChi-Kung Ni
Jul 15, 2004·Journal of the American Chemical Society·Chien-Ming TsengChi-Kung Ni
Aug 20, 2005·The Journal of Chemical Physics·Ming-Fu LinChi-Kung Ni

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Citations

Feb 13, 2008·The Journal of Chemical Physics·Jeremy A JohnsonEric T Sevy
Jun 2, 2015·Physical Chemistry Chemical Physics : PCCP·Christopher S HansenAdam J Trevitt
Dec 7, 2018·The Review of Scientific Instruments·Arthur G Suits
Feb 3, 2019·The Journal of Chemical Physics·Fengzi LingBing Zhang
Mar 29, 2007·The Journal of Physical Chemistry. a·Mario Barbatti, Hans Lischka
Feb 26, 2008·The Journal of Physical Chemistry. a·Mizuki OkuToshinori Suzuki
Oct 31, 2018·The Journal of Physical Chemistry. a·Michael J WilhelmHai-Lung Dai
Aug 29, 2007·The Journal of Physical Chemistry. a·Y A DyakovC-K Ni
Oct 16, 2007·The Journal of Physical Chemistry. B·Chi-Kung NiYuri A Dyakov

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