A curious interplay in the films of N-heterocyclic carbene Pt(II) complexes upon deposition of alkali metals

Organometallic Ir(III) complexes: post-synthetic modification, photophysical properties and binuclear complex construction

Two methods of post-synthetic modification (Suzuki coupling and CuAAC click-reaction) were applied to Ir(III) complexes [Ir(C^{^}N)₂N^{^}N]⁺ to provide the second highly selective donor site. One family of functionalized complexes was used to demonstrate the potential of post-synthetic modification for controlled construction of d-d and d-f binuclear complexes. The complexes obtained were characterized by CHN elemental analysis, NMR spectroscopy, ESI mass-spectrometry, FTIR spectroscopy and single crystal X-ray diffraction analysis. By means of XPS and NEXAFS spectroscopy the coordination of diimine donor site to the Ln(III) centre has been definitely confirmed. The photophysical properties of mono- and binuclear complexes were carefully investigated, and the evolution of luminescent characteristics during the formation of a system of connected metallocenters is also discussed. TDDFT calculations were used to describe the luminescence mechanism and to confirm the conclusions made on the basis of experimental data.

Cis and trans platinum(II) N-heterocyclic carbene isomers: synthesis, characterization and biological activity

The synthesis of cis and trans geometrical isomers of platinum(II) complexes with a symmetric N-heterocyclic carbene ligand (MeNHC) is reported. These complexes were obtained from 1,3-dimethylimidazolium-2-carboxylate, a masked NHC precursor....