Excited States of Triphenylamine-Substituted 2-Pyridyl-1,2,3-triazole Complexes
| Autor: | Aaron D. W. Kennedy, Warrick K. C. Lo, James D. Crowley, Jack O. Turner, Michael W. George, Geoffrey R. Weal, Keith C. Gordon, Hannah J. Davidson, Gregory S. Huff, C. John McAdam, Xue-Zhong Sun, Raphael Horvath |
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| Rok vydání: | 2016 |
| Předmět: |
1
2 3-Triazole 010405 organic chemistry Ligand Substituent chemistry.chemical_element Infrared spectroscopy 010402 general chemistry Triphenylamine Resonance (chemistry) Photochemistry 01 natural sciences 0104 chemical sciences Ruthenium Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry Physical and Theoretical Chemistry Platinum |
| Zdroj: | Inorganic chemistry. 55(23) |
| ISSN: | 1520-510X |
| Popis: | A new 2-pyridyl-1,2,3-triazole (pytri) ligand, TPA-pytri, substituted with a triphenylamine (TPA) donor group on the 5 position of the pyridyl unit was synthesized and characterized. Dichloroplatinum(II), bis(phenylacetylide)platinum(II), bromotricarbonylrhenium(I), and bis(bipyridyl)ruthenium(II) complexes of this ligand were synthesized and compared to complexes of pytri ligands without the TPA substituent. The complexes of unsubstituted pytri ligands show metal-to-ligand charge-transfer (MLCT) absorption bands involving the pytri ligand in the near-UV region. These transitions are complemented by intraligand charge-transfer (ILCT) bands in the TPA-pytri complexes, resulting in greatly improved visible absorption (λmax = 421 nm and ϵ = 19800 M–1 cm–1 for [Pt(TPA-pytri)Cl2]). The resonance Raman enhancement patterns allow for assignment of these absorption bands. The [Re(TPA-pytri)(CO)3Br] and [Pt(TPA-pytri)(CCPh)2] complexes were examined with time-resolved infrared spectroscopy. Shifts in the C≡C and C... |
| Databáze: | OpenAIRE |
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