Ultrafast dissociation dynamics of ketones at 195 nm

Autor:	Andrew P. Baronavski, Jeffrey C. Owrutsky, Daniel A. Steinhurst, Q. Zhong
Rok vydání:	2003
Předmět:	Internal energy Chemistry Excited state Photodissociation General Physics and Astronomy Photoionization Physical and Theoretical Chemistry Rydberg state Photochemistry Spectroscopy Excitation Dissociation (chemistry)
Zdroj:	Chemical Physics Letters. 370:609-615
ISSN:	0009-2614
DOI:	10.1016/s0009-2614(03)00167-2
Popis:	The photodissociation dynamics of the 3s Rydberg state of three ketones (CH3CO–R, R=C2H5, C3H7, and iso-C4H9) and the ensuing dissociation of the nascent acetyl radical following 195 nm excitation were investigated by ultrafast photoionization spectroscopy. The 3s state the lifetimes of these ketones are similar (2.5–2.9 ps), though lifetimes of the acetyl radical range from 8.6 ps for CH3CO–C2H5, 15 ps for CH3CO–C3H7, to 23 ps for CH3CO–(iso-C4H9), which suggests that for larger R more vibrational degrees of freedom compete for the excess energy so that less energy is partitioned into the internal energy of the acetyl radical.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e8975d533860d7d3a12ae3987eb56f74 https://doi.org/10.1016/s0009-2614(03)00167-2 Zobrazit plný text záznamu Full Text from ScienceDirect