Lanthanide-Doped Layered Double Hydroxides Intercalated with Sensitizing Anions: Efficient Energy Transfer between Host and Guest Layers
Poernomo Gunawan
Rong Xu
10.1021/jp905884n.s001
https://acs.figshare.com/articles/journal_contribution/Lanthanide_Doped_Layered_Double_Hydroxides_Intercalated_with_Sensitizing_Anions_Efficient_Energy_Transfer_between_Host_and_Guest_Layers/2824858
Layered double hydroxides (LDHs) doped with Tb<sup>3+</sup> ions in the brucite-like layers were prepared by a simple one-step coprecipitation method at ambient conditions. When 4-biphenylacetate (BPA) anions were intercalated in the interlayer space, a high concentration of Tb<sup>3+</sup> up to around 19 wt % can be homogeneously incorporated in the octahedral lattice of LDHs. The luminescence study indicated that efficient energy transfer from the excited state of the intercalated BPA guest molecules to Tb<sup>3+</sup> centers in the host layers takes place. Compared with LDHs without a photosensitizer, Tb<sup>3+</sup>-doped LDHs intercalated with BPA display much enhanced green luminescence from Tb<sup>3+</sup> ions. Long lifetimes of around 1.3 ms and high quantum yields of 14−22% were obtained. In addition, the emission color of this type of hybrid materials can be tuned from blue to green by varying the amount of Tb<sup>3+</sup> ions. As the compositions of metal cations and interlayer anions in the LDH structure can be easily varied, the inorganic−organic hybrid system reported here opens great opportunity for developing efficient and functional luminescent materials by simple wet chemical methods.
2009-10-01 00:00:00
emission color
LDH structure
ambient conditions
Sensitizing Anions
metal cations
Guest LayersLayered
1.3 ms
Efficient Energy Transfer
quantum yields
interlayer anions
octahedral lattice
Long lifetimes
luminescence study
host layers
intercalated BPA guest molecules
interlayer space
coprecipitation method
Tb
BPA display
energy transfer
chemical methods