Evidence for triplet-state-dominated luminescence in biicosahedral superatomic molecular Au 25 clusters.
Masaaki MitsuiYuki WadaRyoto KishiiDaichi ArimaYoshiki NiihoriPublished in: Nanoscale (2022)
In photoluminescence (PL) quenching and triplet fusion upconversion experiments with fluorescent organic-molecule quenchers, it was revealed that a rod-shaped, phosphine- and thiolate-protected biicosahedral Au 25 cluster (a representative di-superatomic molecule) exhibits only phosphorescence, not fluorescence, at room temperature with an intersystem crossing quantum yield of almost 100%. By virtue of these photophysical properties, this cluster can be used as a triplet sensitizer that undergoes direct singlet-triplet transitions in the near-infrared (NIR) region (730-900 nm), inducing photon upconversion from NIR to visible light.
Keyphrases
- energy transfer
- room temperature
- quantum dots
- visible light
- sensitive detection
- photodynamic therapy
- ionic liquid
- living cells
- fluorescent probe
- fluorescence imaging
- drug release
- reduced graphene oxide
- cross sectional
- single molecule
- escherichia coli
- staphylococcus aureus
- biofilm formation
- drug delivery
- pseudomonas aeruginosa