Platinumii 1,10-phenanthroline complexes of acetylides containing redox-active groupsElectronic supplementary information (ESI) available: Solid-state HETCOR NMR spectrum of Pt1CC–Ph2 and Pt1CC–p-C6H4–CC–Fc2 Fig. S1. ORTEP diagram of the molecular structure of Pt1Cl2·2CHCl3in the crystal Fig. S2. Absorption spectra at room temperature of PtphenCC–Ph2, Pt1CC–Ph2, Pt1CC–Ph–CC–Fc2 and Pt1CC–Fc2 in different solvents Fig. S3. Emission spectra upon shock-freezing of Pt1CC–Ph2 in different solvents and in microcrystalline form Fig. S4. Concentration dependence of normalised luminescence spectra of Pt1CC–Ph2 at 77 K in frozen glassy solution Fig. S5. See http://www.rsc.org/suppdata/dt/b5/b503794h/

Autor: Siemeling, Ulrich, Bausch, Kirstin, Fink, Heinrich, Bruhn, Clemens, Baldus, Marc, Angerstein, Brigitta, Plessow, Regina, Brockhinke, Andreas
Zdroj: Dalton Transactions; 2005, Vol. 2005 Issue: 14 p2365-2374, 10p
Abstrakt: The new diimine ligand 3,8-di-n-pentyl-4,7-diphenylethynyl-1,10-phenanthroline 1 was used for the synthesis of a range of PtIIcomplexes, viz.Pt1Cl2, Pt1CC–Ph2, Pt1CC–Fc2 and Pt1CC–p-C6H4–CC–Fc2 Fc ferrocenyl. Crystal structure analyses were performed for Pt1Cl2 and Pt1CC–Ph2 and revealed that the diacetylide π-tweezer of the latter binds a molecule of chloroform through C–Hπ hydrogen bonds. The redox and optical properties of 1and its complexes were investigated by spectro-electrochemistry, UV–Vis and luminescence spectroscopy, and an energy level diagram was derived for Pt1CC–Fc2 and related compounds on the basis of the data collected. The ferrocenyl-substituted PtIIcomplexes are donor–sensitiser assemblies. Intramolecular quenching of the photoexcited PtIIdiimine unit leads to very short luminescence lifetimes for Pt1CC–p-C6H4–CC–Fc2 2 ns and Pt1CC–Fc2 0.3 ns, as opposed to Pt1CC–Ph2 0.7 µs. Excimer formation has been observed for Pt1CC–Ph2 at room temperature in dichloromethane and at low temperatures in frozen glassy dichloromethane and 2-methyltetrahydrofuran solution, but not in the solid state.
Databáze: Supplemental Index
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