Yersin, Hartmut and Truembach, Dietrich and Wiedenhofer, Harald (1999) High-pressure, low-temperature emission studies of a metal-organic platinum(II) compound in a Shpol'skii matrix. INORGANIC CHEMISTRY, 38 (7). pp. 1411-1415. ISSN 0020-1669,
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The emission of Pt(2-thpy)(2) (2-thpy(-) = 2-(2-thienylpyridinate)) doped into an n-decane Shpol'skii matrix has been studied at T = 4.2 K (0 kbar) and at different pressures up to 14 kbar at T approximate to 5 K. This type of matrix is used for the first time for high-pressure investigations of transition metal complexes. The emitting state of Pt(2-thpy)(2) is of 3 pi pi* character with a significant MLCT admixture, and the ground state is a singlet. The spectra are well resolved and thus show the electronic origin (0-0 transition) of the most intensively emitting triplet sublevel as well as a number of vibrational Franck-Condon satellites. The corresponding pressure-induced shifts are determined. In particular, the value for the electronic origin is with Delta<(nu)over bar>/Delta p = -(3 +/- 1) cm(-1)/kbar(-1) relatively small, due to an apparently small inherent shift of the singlet-triplet transition. In addition, the smallness of this value seems to be related to the very weak interaction between the chromophore and the environment for this Shpol'skii matrix, whereby this interaction does not strongly change with pressure. The intensity distribution of the vibrational satellite structure shows that the equilibrium positions of the potential hypersurfaces of ground and excited states are very similar at ambient pressure. Apparently this situation is not changed up to 14 kbar.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EXCITED-STATE PROPERTIES; SINGLE-CRYSTALS; ELECTRONIC-STRUCTURE; CHARGE-TRANSFER; RAMAN-SPECTRA; COMPLEXES; FLUORESCENCE; PT(2-THPY)(2); EXCITATION; LIGANDS; |
| 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. Hartmut Yersin |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Nov 2022 10:37 |
| Last Modified: | 08 Nov 2022 10:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48336 |
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