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Formation of CN (B2∑+) radicals in the vacuum-ultraviolet photodissociation of pyridine and pyrimidine molecules
Abstrakt
Formation of the excited CN(B2∑+) free radicals in the photodissociation of pyridine (C5H5N) and pyrimidine (C4H4N2) molecules was investigated over the energy ranges 16–27 and 14.7–25 eV, respectively. Photon-induced fluorescence spectroscopy was applied to detect the vibrationally and rotationally excited CN radicals by recording the B2∑+→X2∑+ emission bands (violet system). The measured dissociation yield curves demonstrate that the CN(B2∑+) formation occurs via excitation of pyridine and pyrimidine molecules into higher-lying superexcited states. This is followed by rearrangement and isomerization of the excited molecules before dissociation. The vertical excitation energies of the superexcited states were determined and the probable dissociation mechanisms of both molecules are discussed.
Autorzy (4)
-
Antti Kivimaki
- CNR-IOM, Laboratorio TASC Italy
-
Marcello Coreno
- CNR-IMIP, Monterotondo Italy
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
-
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
nr 47,
strony 1 - 10,
ISSN: 0953-4075 - Język:
- angielski
- Rok wydania:
- 2014
- Opis bibliograficzny:
- Wąsowicz T., Kivimaki A., Coreno M., Zubek M.: Formation of CN (B2∑+) radicals in the vacuum-ultraviolet photodissociation of pyridine and pyrimidine molecules// JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. -Vol. 47, nr. 5 (2014), s.1-10
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 88 razy
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