Pawlowski, Valeri and Kunkely, Horst and Lennartz, Christian and Boehn, Karlheinz and Vogler, Arnd (2004) Synthesis, structure, optical properties and theoretical studies of Pt(P-P)(CN)(2) with P-P=1,2-bis(diphenylphosphanyl)benzene and 2,2 '-bis(diphenylphosphanyl)-1-1 '-binaphthyl - Luminescence from metal-to-ligand charge transfer and intraligand states. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (21). pp. 4242-4246. ISSN 1434-1948, 1099-0682
Full text not available from this repository. (Request a copy)Abstract
The complexes Pt-II(P-P)(CN)(2) with P-P = 1,2-bis(diphenylphosphanyl)benzene (dppb) and 2,2'-bis(diphenylpliosphanyl)-1,1'-binaphthyl (binap) were synthesised and characterised by elemental analysis, ESI MS and electronic spectroscopy. ;The structure of Pt(dppb)(CN)(2) was resolved by single-crystal X-ray diffraction. This compound consists of mononuclear Pin complexes with an almost planar PtP2C2 CO-ordination. While both complexes are not luminescent in solution, they show an emission in the solid state under ambient conditions. It is suggested that the luminescence of Pt(dppb)(CN)(2) originates from a (Pt-II --> dppb) metal-to-ligand charge transfer (MLCT) triplet with some dppb intraligand (IL) contribution. This assignment is confirmed by calculations which provide further insight into the excited state properties of the complex. In solution the phosphorescence is absent because the MLCT/IL state is deactivated to a nonemissive ligand field (LF) triplet, which is located at rather low energies owing to its distortion towards a tetrahedral structure. In the solid state this distortion is hindered. In the case of solid Pt(binap)(CN)(2), the phosphorescence is apparently of the IL type as the pipi* triplet of the binaphthyl chromophore occurs at low energies. Again, in solution the phosphorescence is absent owing to the interference by a distorted LF state. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | APPROXIMATE COULOMB POTENTIALS; AUXILIARY BASIS-SETS; PLATINUM(II) COMPLEXES; PHOSPHINE-LIGANDS; CRYSTAL-STRUCTURE; EXCITED-STATES; PHOTOLUMINESCENCE; ENERGY; DITHIOLATE; ATOMS; electronic spectra; luminescence; platinum complexes; phosphatic complexes; quantumchemical calculations |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Prof. Dr. Arnd Vogler |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Jun 2021 05:29 |
| Last Modified: | 23 Jun 2021 05:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/36995 |
Actions (login required)
 |
View Item |
