Synthesis and Photophysical Properties of Butterfly-shaped Dinuclear Pt(II) complex having NHC-based Chelate Ligands

Publication date: Available online 25 April 2019Source: Inorganica Chimica ActaAuthor(s): Sangjoon Moon, Shinnosuke Horiuchi, Eri Sakuda, Akitaka Ito, Yasuhiro Arikawa, Keisuke UmakoshiAbstractA butterfly-shaped dinuclear Pt(II) complex having pyridyl-NHC chelate ligands and bridging Me2pz ligands was synthesized. The crystal structure of the Pt2 complex showed short intramolecular Pt∙∙∙Pt distance (3.129 Å) and unique packing structure containing one-dimensional infinite pore that was filled with solvent molecules. The absorbance was proportional to the concentration of Pt2 complex and no significant bands appeared even in high concentration (up to 100 μM). The Pt2 complex showed bluish-green emission (λmax = 459 nm) in the solid state at 298 K (λex = 330 nm). TD-DFT calculation revealed that the lowest-energy absorption bands are mainly assigned to the combination of metal-to-ligand charge transfer (MLCT) and ligand-to-ligand charge transfer (LLCT) transitions.Graphical abstractA luminescent butterfly-shaped dinuclear Pt(II) complex having pyridyl-NHC chelate ligands and bridging Me2pz ligands was synthesized. The crystal structure showed unique packing structure containing one-dimensional infinite pore that was filled with solvent molecules.

Source: Inorganica Chimica Acta - April 26, 2019 Category: Chemistry Source Type: research