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MO: Molekülphysik

MO 43: Biomolecules I

MO 43.2: Vortrag

Mittwoch, 15. März 2006, 14:15–14:30, H10

Photofragment spectroscopy of small protonated Biomolecules — •Dirk Nolting — Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Str. 2a, 12489 Berlin

A combination of an electrospray ion source and a Paul trap was used to investigate the spectroscopic properties of protonated model chromophores like adenine and tryptophan in the gas phase. The energy of an UV photon is above the dissociation energy, therefore the absorption of one or several photons can lead to a statistical dissociation. This can be used to probe the absorption spectra of protonated molecules. The experiments indicate that some of the relaxation pathways known from their neutral counterparts are also present in the ionic species but there are also new relaxation and dissociation pathways unique to protonated species.