Vibronic Spectroscopy of Jet-Cooled 1,4-PHENYLENE Diisocyanide

Details Vibronic Spectroscopy of Jet-Cooled 1,4-PHENYLENE Diisocyanide Vibronic Spectroscopy of Jet-Cooled 1,4-PHENYLENE Diisocyanide

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mss..confetg07m&link_type=abstract

"International Symposium On Molecular Spectroscopy, 66th Meeting, Held 20-24 June, 2011 at Ohio State University. http://molspec

Physics

Electronic

Scientific paper

This talk will present results of a gas phase, jet-cooled vibronic spectroscopy study of 1,4-PDI. A fluorescence excitation spectrum spanning the range 35,500-44,100 Cm- 1 (226.5-281.5 nm) has been recorded, as well as a resonant two photon ionization excitation and UV hole-burning spectrum, in the region of 35,500-36,500 Cm-1. The S_0-S_1 origin is a weak band located at 35,566 Cm-1. The spectrum in the S_1 region is dominated by vibronic coupling to the S_2 state. Dispersed fluorescence spectra will be presented that uncover and characterize the vibronic coupling. We have also located the S_0-S_2 origin 5687 Cm-1 above the S_0-S_1 origin. Evidence will be presented for the coupling of the S_2 levels with nearby S_1 levels and for internal conversion from S_2 to S_1 on the timescale of the fluorescence.

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