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MO: Fachverband Molekülphysik

MO 13: Molekülphysik Poster 1

MO 13.3: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 8 Foyer

Fluorescence and lifetime of the [Ni₃(4-methoxyphenyl-pyrazole)₆] complex — •Yvonne Schmitt¹, Susann Bergner², Werner Thiel², and Markus Gerhards¹ — ¹Physikalische und Theoretische Chemie, TU Kaiserslautern, Erwin Schrödinger-Str. 52, 67663 Kaiserslautern — ²Anorganische Chemie, TU Kaiserslautern

With respect to catalytic and magnetic properties the investigation of complexes containing more than one metal atom is of great interest. Here we investigate a complex containing three Ni atoms: [Ni₃(4-methoxyphenylpyrazole)₆], by applying fluorescence spectroscopy which has a high sensitivity with respect to changes in structure and environment. The measurements are performed in an acetonitrile and dichlormethane solution as a function of the excitation energy. For specific electronic transitions the lifetime is determined by analyzing the phase shift and modulation of the fluorescence light, i.e. lifetimes down to about 10 ps can be determined by frequency domain measurements. Another interesting point is the feasible reaction of the complex with oxygen. Furthermore the concentration dependence with respect to the formation of aggregates is discussed.