Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 19: Posters 4: Novelties in Molecular Physics: Femtosecond Spectroscopy, Molecular Clusters, Cold Molecules and Helium Droplets
MO 19.13: Poster
Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof
Optical properties of thionized diamondoids — •Tobias Zimmermann1, Theresa Höhne1, Andre Knecht1, Robert Richter1, Andrey A Fokin2, Peter R Schreiner2, Thomas Möller1, and Torbjörn Rander1 — 1Institut für Optik und Atomare Physik, Technische Universität Berlin — 2Institut für Organische Chemie, Justus-Liebig-Universität Giessen
Diamondoids, perfectly size- and shape-selectable sp3-hybridized cabon nanoparticles, exhibit intrinsic UV luminescence. It was shown through size- and shape-dependent studies that pristine diamondoids offer detailed insight into luminescence properties of large molecules [1]. However, so far no gas phase luminescence has been observed for diamondoids functionalized with foreign atoms. Recently, it has been predicted that thionization could alter the optical gaps for such particles to the VIS/IR spectral regime [2]. While adamantane-2-thione, the smallest member of the series, is known to show phosphorescence in solution [3], a broader selection of different sized thionized diamondoids could be successfully synthesized just recently. To probe luminescence in the gas phase and the effect of the particle size as well as thionization order, we investigated the electronic structure of this series in a combined study with synchrotron radiation and an OPO laser system.
[1] R. Richter et al., Phys. Chem. Chem. Phys. 17, 4739 (2015).
[2] M. Vörös et al., Phys. Rev. Lett. 108, 267401 (2012).
[3] K. J. Falk et al., J. Am. Chem. Soc. 111, 6518 (1989).