Fischer, J. and Fuchs, S. and Slenczka, A. and Karra, M. and Friedrich, B. (2018) Microsolvation of porphine molecules in superfluid helium nanodroplets as revealed by optical line shape at the electronic origin. JOURNAL OF CHEMICAL PHYSICS, 149 (24): 244306. ISSN 0021-9606, 1089-7690
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We investigate the line shape at the electronic origin of single porphine molecules doped into super fluid helium droplets as a function of the droplet size. Helium droplets comprised of less than 105 atoms are generated from an expansion of gaseous helium, while droplets with more than 105 atoms originate from liquid helium. In contrast to our recent study on phthalocyanine, porphine is found to exhibit a solvent shift to the blue with respect to the gas-phase resonance frequency as well as a multiplet splitting. A comparison of the helium-induced features of phthalocyanine and porphine with those obtained in similar studies on tetracene and pentacene reveals that these occur chiefly as two kinds of excitations distinguished by their linewidths and their dependence on the droplet size. Moreover, at quasi-bulk conditions achieved with droplets in excess of 106 helium atoms, none of these four dopant species yields an optical spectrum that can be assigned to a plausible rotational band structure. (C) 2018 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FREE-BASE; HF V=1; PHTHALOCYANINE; SPECTROSCOPY; DROPLETS; TETRACENE; EXCITATIONS; CLUSTERS; BAND; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof. Dr. Alkwin Slenczka |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Oct 2019 12:09 |
| Last Modified: | 02 Oct 2019 12:09 |
| URI: | https://pred.uni-regensburg.de/id/eprint/13332 |
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