Publications by authors named "Willem Klopper"
To develop new and flexible Cu containing luminescent substances, we extend our previous investigations on two metal-centered species to four metal-centered complexes. These complexes could be a basis for designing new organic light-emitting diode (OLED) relevant species. Both the synthesis and in-depth spectroscopic analysis, combined with high-level theoretical calculations are presented on a series of tetranuclear Cu complexes with a halide containing Cu X core (X=iodide, bromide or chloride) and two 2-(diphenylphosphino)pyridine bridging ligands with a methyl group in para (4-Me) or ortho (6-Me) position of the pyridine ring.
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- - This research focuses on new polynuclear complexes that feature a core made of three metal atoms (Cu, Ag, or Au) linked by a specific type of ligand, resulting in unique triple-stranded helical structures.
- - An in-depth analysis using spectroscopic methods and quantum chemical calculations reveals how these complexes behave in both their ground and excited electronic states, noting significant distortions in their structures when excited.
- - Time-resolved IR spectroscopy studies show that the complexes have unusual triplet state lifetimes, particularly highlighting that the gold-containing complex has a lifetime over five times longer than that of the copper complex, indicating a cooperative effect between the metal and ligand components.