Berlin 2014 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 5: Posters 1: Electronic Spectroscopy, Photochemistry, Femtosecond Spectroscopy

MO 5.18: Poster

Montag, 17. März 2014, 16:30–18:30, Spree-Palais

Photophysics of Pyrophosphito-bridged diplatinum complexes — •Benedikt Burgard¹, Florian Bäppler¹, Patrick Singer¹, Fabian Rupp¹, Rolf Diller¹, Christoph Riehn², Yevgenyi Nosenko², Dimitri Imanbaew², and Sebastian Kruppa² — ¹Dept. of Physics, Univ. Kaiserslautern, 67663 Kaiserslautern, Germany — ²Dept. of Chemistry, Univ. Kaiserslautern, 67663 Kaiserslautern, Germany

The binuclear platinum(II) complex [Pt₂(µ-P₂O₅H₂)₄]⁴⁻(PtPOP) exhibits interesting ultrafast photoinduced dynamics^[1,2]. We employ fs transient absorption in the UV/Vis and mid-IR in solution and fs pump-probe photofragmentation (PF) of isolated anionic PtPOP species in gas phase, generated by electrospray ionization. Wavelength dependent PF studies provide information on electronic states and fragmentation behavior. Cooperative effects with respect to electronic and nuclear dynamics of M-PtPOP(-M) (M = Ag⁺, Tl⁺) species were studied. Wavepacket motion and transient IR spectra give information on structural dynamics. Solution experiments are compared to those in gas phase evaluating the influence of the solvent on energy relaxation processes (IC, ISC).

[1] R. M. van der Veen, A. Cannizzo, F. van Mourik, A. Vlček Jr., M. Chergui, JACS, 133, 305 (2011).

[2] M. Christensen, K. Haldrup, K. Bechgaard, R. Feidenhans’l, Q. Kong, M. Cammarata, M. Lo Russo, M. Wulff, N. Harrit, M. M. Nielsen, JACS, 131, 502-508 (2009).