Heteroleptic Ir(III)N6 Complexes with Long-Lived Triplet Excited States and in Vitro Photobiological Activities
| Autor: | Bingqing Liu, Svetlana Kilina, Huimin Yin, Peng Cui, Marc Hetu, Susan Monro, Anderson Fuller, Sherri A. McFarland, Wei Xu, Wenfang Sun, Li Wang, Colin G. Cameron |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Phenanthroline Cationic polymerization Substituent chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Crystallography chemistry Excited state Pyrene General Materials Science Iridium 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 11:3629-3644 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | A series of cationic heteroleptic iridium(III) complexes bearing tris-diimine ligands [Ir(phen)2(R-phen)]3+ (R-phen = phenanthroline (1), 3,8-diphenylphenanthroline (2), 3,8-dipyrenylphenanthroline (3), 3-phenylphenanthroline (4), 3-pyrenylphenanthroline (5), and 3,8-diphenylethynylphenanthroline (6)) were synthesized and characterized. These complexes possessed phen ligand-localized 1π,π* transitions below 300 nm, and charge transfer (1CT) and/or 1π,π* transitions between 300 and 520 nm. In 1, 2, 4, and 6, the low-energy bands were mixed 1CT/1π,π*. However, the increased π-donating ability of the pyrenyl substituent(s) in 3 and 5 split the low-energy bands into a pyrene-based 1π,π* transition at 300–380 nm and an intraligand charge transfer (1ILCT) transition at 380–520 nm. All complexes were emissive at room temperature in CH3CN, but the parentage of the emitting state varied depending on the R substituent(s). Complex 1 exhibited predominantly phen ligand-localized 3π,π* emission mixed with metal-to-lig... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|