Berlin 2014 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 11: Biomolecules 1
MO 11.2: Vortrag
Mittwoch, 19. März 2014, 14:15–14:30, BEBEL HS213
Rotational Spectrum of 4-Aminobenzonitrile - Nuclear Quadrupole Coupling Constants of Two Chemically Distinct Nitrogen Atoms — •Thomas Betz1,2,3, Sabrina Zina1,2,3, Jack B. Graneek1,3, and Melanie Schnell1,2,3 — 1Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, D-22761 Hamburg — 2The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg — 3Center for Free-Electron Laser Science, Notkestrasse 85, D-22607 Hamburg
4-aminobenzonitrile belongs to the class of para-substituted benzonitriles, which evoked attention because some representatives display double-fluorescence effects. In 4-aminobenzonitrile this has not been observed and this study aims to improve the understanding of the underlying principles.
The rotational spectrum between 2 and 8.5 GHz of this molecule in the gas phase is reported. Due to the two chemically distinct nitrogen atoms the observed transitions show a complex hyperfine structure. From the determination of the nuclear quadrupole coupling constants, information on the electronic environment of these atoms could be inferred. The results are compared to related molecules and indicate a reason for the absence of double-fluorescence effects in 4-aminobenzonitrile.