Search for excitation selectivity in infrared multiple photon dissociation. 1,1,1-Trideuterio-2,5-dithiahex-3-yne

S. Ruhman, Y. Haas*, J. Laukemper, M. Preuss, H. Stein, D. Feldmann, K. H. Welge

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The question of excitation selectivity in unimolecular reactions induced by infrared multiple photon excitation (IRMPE) was probed by using the isotopically labeled molecule CH3SCCSCD3. The relatively rigid SCCS group was inserted in order to serve as a block to fast intramolecular energy exchange between the CH3 and CD3 moieties. Irradiation by a CO2 laser pulse could initially selectively excite either one. Probing was done in real time at low pressures (∼10-4 torr) by vacuum-UV laser single-photon ionization. At all irradiation wavelengths, equal amounts of CH3 and CD3 radicals were formed. Thus, fast intramolecular energy exchange on the time scale of the IRMPE process is directly demonstrated.

Original languageEnglish
Pages (from-to)5162-5167
Number of pages6
JournalJournal of Physical Chemistry
Volume88
Issue number22
DOIs
StatePublished - 1984

Fingerprint

Dive into the research topics of 'Search for excitation selectivity in infrared multiple photon dissociation. 1,1,1-Trideuterio-2,5-dithiahex-3-yne'. Together they form a unique fingerprint.

Cite this