PtII Phosphors with Click-Derived 1,2,3-Triazole-Containing Tridentate Chelates
| Autor: | Eckhard Birckner, Michael Jäger, Helmar Görls, Christian Friebe, Benjamin Schulze, Andreas Dr. Winter, Ulrich S. Schubert |
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| Rok vydání: | 2017 |
| Předmět: |
1
2 3-Triazole 010405 organic chemistry Ligand Organic Chemistry Phosphor 010402 general chemistry Photochemistry 01 natural sciences 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound chemistry Atomic orbital Click chemistry Moiety Chelation Physical and Theoretical Chemistry Phosphorescence |
| Zdroj: | Organometallics. 37:145-155 |
| ISSN: | 1520-6041 0276-7333 |
| Popis: | A series of PtII complexes featuring 1,2,3-triazole-derived N∧N∧N-, N∧C∧N- and C∧N∧C-coordinating ligands were studied both experimentally and computationally aiming at the design of new PtII phosphors. By virtue of click chemistry, the new complexes were readily functionalized, e.g., with bulky groups in order to suppress aggregation of the complexes. For a N∧C∧N-type cyclometalated PtII complex, the high energy of the π* orbitals of the 1,2,3-triazole units gave rise to deep-blue phosphorescence; the poor luminescence quantum yield was attributed to an inadequate energy separation between the emissive state and the d–d states. However, when the 1,2,3-triazole donor moiety acted as a spectator/ancillary ligand only, an intense green emission could be achieved (ΦPL = 0.57, τ = 4.6 μs). |
| Databáze: | OpenAIRE |
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