Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MO: Fachverband Molekülphysik

MO 20: Electronic Spectroscopy 2

MO 20.1: Vortrag

Donnerstag, 20. März 2014, 16:30–16:45, BEBEL SR144

Electronic Spectroscopy of 1-Phenylethynyl-Naphthalene — •Philipp Constantinidis¹, Melanie Lang¹, Jörg Herterich¹, Ingo Fischer¹, Johannes Auerswald², and Anke Krueger² — ¹Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany — ²Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany

A recent IR/UV double resonance study identified 1-phenylethynyl-naphthalene (1-PEN) as the major dimerization product of phenylpropargyl radicals. Considering the importance of C₃ hydrocarbons in the initial phase of the formation of polycyclic aromatic hydrocarbons (PAHs) in combustion processes, both the phenylpropargyl radical as C₉ unit and its stable dimer 1-PEN could also play a conceivable role in PAH growth [1].
We investigated the S₁ excited state of 1-PEN by means of [1+1]-REMPI spectroscopy. A rich structure of low wavenumber bands was observed, which could be assigned to the torsional motion. Vibrational frequencies of 6 cm^-1 and 17 cm^-1 respectively were derived for the torsional mode in the ground and excited state. Spectra of the 1-PEN/Ar cluster exhibit a red shift of the origin of 22 cm^-1, comparable to argon clusters of other aromatic molecules.

[1] K. H. Fischer, J. Herterich, I. Fischer, S. Jaeqx and A. M. Rijs, J. Phys. Chem. A 116, 8515 (2012)