Alkynyl-Stabilized Superatomic Silver Clusters Showing Circularly Polarized Luminescence.
Miao-Miao ZhangXi-Yan DongZhao-Yang WangXi-Ming LuoJia-Hong HuangShuang Quan ZangThomas C W MakPublished in: Journal of the American Chemical Society (2021)
We report a new enantiomeric pair of superatomic silver clusters, R/S-Ag17, prepared from chiral alkynyl ligands. R-Ag17 and S-Ag17 possess C3 symmetry and emit near-infrared (NIR) light with a quantum yield (QY) of 8.0% under ambient condition as well as NIR circularly polarized luminescence (CPL) as a result of the chirality of the excited states. Both experiments and theoretical calculations indicate for the first time that the CPL originates from transitions between superatomic 1Pz (along the C3 axis) and 1S orbitals. This work opens a new avenue for CPL-active metal nanoclusters by utilizing chiral alkynyl ligands and enlightens the chirality transfer from chiral protecting ligands to superatomic states in metal clusters.
Keyphrases
- quantum dots
- energy transfer
- capillary electrophoresis
- sensitive detection
- density functional theory
- gold nanoparticles
- fluorescent probe
- photodynamic therapy
- ionic liquid
- molecular dynamics
- mass spectrometry
- silver nanoparticles
- drug release
- fluorescence imaging
- highly efficient
- air pollution
- visible light
- molecular dynamics simulations
- particulate matter
- drug delivery