Synthesis and Photophysical Properties of Ru Homo- and Heterodinuclear Transition Metal Complexes Bearing Tetrakispyrazolylethene as a Bridging Ligand
We report the synthesis and characterization of Ru mononuclear (<b>1</b>), Ru/Pd dinuclear (<b>2</b>), and Ru/Ru dinuclear (<b>3</b>) complexes bearing tetrakis(pyrazol-1-yl)ethene (<b>L</b>) as a bridging ligand. NMR analyses and single-crystal X-ray crystallography reveal that <b>1</b> has a distorted octahedral geometry with <i>C</i><sub>1</sub> symmetry at room temperature and quasi-<i>C</i><sub>2</sub> symmetry upon heating, resulting from the thermally activated motion of <b>L</b>. The coordination of <b>L</b> to the second metal (Pd or Ru) restricts its motion. In the case of complex <b>2</b>, this restriction leads to enhanced emission at room temperature, accompanied by the energy transfer from the Ru unit to Pd.
Authors
- Takanori Iwasaki (ORCID: https://orcid.org/0000-0002-6663-3826)
- Kyoko Nozaki (ORCID: https://orcid.org/0000-0002-0321-5299)
- Toshikazu Ono (ORCID: https://orcid.org/0000-0001-5427-8540)
- Luxia Cui (ORCID: https://orcid.org/0000-0002-6345-2560)
- Yuta Takemasa (ORCID: https://orcid.org/0000-0002-2191-3250)
- Morinori Kawamata (ORCID: https://orcid.org/0009-0009-3898-2963)
Institutions
- Kyushu University (JP)
- The University of Tokyo (JP)
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2025-12-05
- DOI
- https://doi.org/10.1021/acs.inorgchem.5c04538
- Primary Topic
- Organic Light-Emitting Diodes Research
- Type
- article
- Field-Weighted Citation Impact
- 0.00