Spectra, Structures, and Dynamics
of Weakly Bound Complexes from Dimers to Nonamers.
Wolfgang Jäger
Department of Chemistry, University of Alberta, Edmonton AB T6G 2G2, Canada
The topic of this presentation will be high resolution rotational and ro-vibrational spectra of weakly bound clusters and their analysis and interpretation in terms of cluster structures and dynamics. Some of the microwave, millimeter wave, and submillimeter wave techniques that are used for the study weakly bound complexes will be introduced and explained, using the spectrometers available in the Edmonton laboratory as examples. In the second part of the talk, a number of molecular systems will be discussed to illustrate the richness and the diversity of the information contained in the spectra. Three different aspects will be considered in detail:
- Internal motions, such as internal rotation and inversion motions, that lead to tunneling splittings in the observed spectra;
- Three-body non-additive interactions that play a role in ternary and higher clusters;
- Very weakly bound, helium atoms containing, clusters.