Dresden 2011 – scientific programme
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MO: Fachverband Molekülphysik
MO 10: Cluster
MO 10.4: Talk
Tuesday, March 15, 2011, 11:15–11:30, MER 02
Infrared spectra and structures of silver-PAH cation complexes — •Marco Savoca1, Torsten Wende2, Ling Jiang2, Judith Langer1, Gerard Meijer2, Otto Dopfer1, and Knut Asmis2 — 1Optik und Atomare Physik, TU Berlin — 2Fritz-Haber-Institut, Berlin
Hybrids of metal and polycyclic aromatic hydrocarbons (PAHs) are promising building blocks for new materials with tailored opto-electronic properties. We report the first experimental mid-infrared spectra of Ag-PAH cation complexes measured in the linear absorption regime via messenger-tagging of the size-selected, cryogenically cooled complexes. The infrared photodissociation (IRPD) spectra of Ne-tagged Ag-PAH cation complexes (PAH=naphthalene-pyrene) are assigned on the basis of a comparison to simulated vibrational spectra from density functional calculations. The analysis of the IRPD spectra, which resolve IR bands as weak as a few km/mol, allows us to identify the Ag binding site and to gain valuable insight into the effects of Ag cation complexation on the geometry and charge distribution of the PAH.