Dual Emission with Efficient Phosphorescence Promoted by Intermolecular Halogen Interactions in Luminescent Tetranuclear Zinc(II) Clusters.
Fumiya KobayashiYuta TakatsuDaisuke SaitoMasaki YoshidaMasako KatoMakoto TadokoroPublished in: Inorganic chemistry (2024)
The development of Zn-based phosphorescent materials, associated with a ligand-centered (LC) transition, is extremely limited. Herein, we demonstrated dual emissions including fluorescence and phosphorescence in luminescent tetranuclear Zn(II) clusters [Zn 4 L I 4 (μ 3 -OMe) 2 X 2 ] ( HL I = methyl-5-iode-3-methoxysalicylate; X = I, Br, Cl), incorporating iodine-substituted ligands. Single-crystal X-ray structural analyses and variable-temperature emission spectra studies revealed the presence of iodine substitutions, and intermolecular halogen interactions produced the internal/external heavy-atom effects and yielded strong green phosphorescence with a long emission lifetime (λ max = 510-522 nm, Φ em = 0.28-0.47, τ av = 0.78-0.95 ms, at 77 K). This work provided a new example that the introduction of halogen interactions is an advantageous approach for inducing phosphorescence in fluorescent metal complexes.
Keyphrases
- room temperature
- energy transfer
- quantum dots
- dual energy
- heavy metals
- mass spectrometry
- ionic liquid
- solid state
- multiple sclerosis
- high resolution
- metal organic framework
- ms ms
- photodynamic therapy
- computed tomography
- molecular docking
- single cell
- molecular dynamics
- risk assessment
- density functional theory
- simultaneous determination
- living cells
- electron transfer