Heidelberg 2015 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 10: Experimental Techniques

MO 10.1: Vortrag

Dienstag, 24. März 2015, 14:30–14:45, PH/SR106

Luminescence Characterization of Mass-Selected Electrosprayed Ions Embedded in Rare-Gas Matrices — •Bastian Kern¹, Jean-Francois Greisch^{1, 2}, Dmitry Strelnikov¹, Artur Böttcher¹, Patrick Weis¹, Detlef Schooss^{1, 2}, Berhard Schäfer², Mario Ruben^2,3, and Manfred M. Kappes^1,2 — ¹Physikalische Chemie Mikroskopischer Systeme, Karlsruhe Institute of Technology, Fritz-Haber Weg 2, 76131 Karlsruhe, Germany — ²Insitute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany — ³Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany

The combination of electrospray ionization (ESI), laser-induced luminescence, and matrix isolation is demonstrated for the first time using lanthanide diketonate ions. The accumulation of mass-selected ions over several hours into a cryogenic rare-gas matrix yields material amounts large enough for sensitive measurements on elusive species whose properties are typically masked in standard condensed-phase measurements. With the additional advantage of measurements at 5K, spectra were obtained which display sharp emission lines. Comparison of matrix laser induced luminescence measurements with those on trapped ions in the gas phase show a remarkable agreement, i. e. the vibronic bands are close to identical. This suggests that the neon matrix used induces only negligible geometrical and electronical perturbations to the species studied.