SAMOP 2021 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 7: Poster 1
MO 7.11: Poster
Donnerstag, 23. September 2021, 17:30–19:30, P
Photodissociation spectroscopy of binuclear coinage metal complexes — •Marcel Schmitt1, Sebastian Kruppa1, Simon Walg1, Werner Thiel1, Wim Klopper2, and Christoph Riehn1 — 1Fachbereich Chemie und Forschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern — 2Institut für Physikalische Chemie, KIT, 76131 Karlsruhe
Multimetallic coinage metal complexes, featuring intricate metallophilic (M-M) interaction that govern photophysical properties such as bright luminescence and redox reactivity, are a prominent topic in functional material research [1,2]. Here, using quadrupole ion trap mass spectrometry, in situ synthesized homo- and heterobinuclear d10-d10 metal complexes of type [MM’(dcpm)2]2+ (M, M’ = CuI, AgI, AuI; dcpm = bis(dicyclohexylphosphino)methane) were investigated in gas-phase via collisional-induced dissociation (CID) and ultraviolet photodissociation (UV PD) spectroscopy using femto- and nanosecond laser sources [3]. The resulting photodissociation spectra show a spectral blue shift of the lower energy metal-centered (MC) states in the order of Cu2 < CuAu < CuAg < Au2 < AgAu < Ag2. These spectra were supported by quantum chemical calculations of GW-Bethe-Salpeter-equation (GW-BSE) approach, revealing a shortening of metal-metal binding upon excitation assigned to 1MC(dσ*-pσ / dσ*-pπ) transitions.
[1]Q. Wan et al., PNAS USA, 2021, 118 (1) e2019265118; [2] C.-M. Che et al., Coord. Chem. Rev. 2005, 249, 1296; [3] S. V. Kruppa et al., Phys. Chem. Chem. Phys. 2017, 19, 22785.