AI Article Synopsis
- - The study focuses on creating and analyzing d metal complexes using strong-field chelating 1,1'-bis(-carborane) ligands, which do not engage in metal-to-ligand charge transfer but enhance the ligand field strength.
- - Techniques like UV-Vis spectroscopy, X-ray analysis, and DFT calculations confirm the unique properties of these complexes, particularly highlighting a Pt(II) complex with a di-butyl bipyridine ligand that shows blue phosphorescence due to charge transfer to the ligand.
- - The 3D structure of the carborane ligand prevents interactions between metal ions in solid-state, preserving their emission characteristics, and suggesting potential for developing advanced OLED materials with customizable features. *
Article Abstract
We report the synthesis and characterization of a series of d metal complexes featuring robust and photophysically innocent strong-field chelating 1,1'-bis(-carborane) () ligand frameworks. A combination of UV-Vis spectroscopy, single crystal X-ray structural analysis, and DFT calculations of these species suggest that the dianionic ligand does not contribute to any visible metal-to-ligand charge transfer (MLCT) transitions, yet it provides a strong ligand field in these complexes. Furthermore, a -based Pt(II) complex containing a 4,4'-di--butyl-2,2'-bipyridine ligand (dtb-bpy) has been prepared and was found to display blue phosphorescent emission dominated by MLCT from the Pt(II) center to the dtb-bpy ligand. Importantly, the bulky three-dimensional nature of the ligand precludes intermolecular Pt(II)⋯Pt(II) interactions in the solid state where the resulting compounds retain their emission properties. This study opens a potentially new avenue for designing organic light-emitting diode (OLED) materials with tunable properties featuring photophysically innocent boron-rich cluster ligands.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5300762 | PMC |
| http://dx.doi.org/10.1039/C6SC01146B | DOI Listing |
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