Journal
DALTON TRANSACTIONS
Volume 44, Issue 38, Pages 16810-16817Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5dt02555a
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Funding
- National Natural Science Foundation of China [21401218, 21171179]
- Excellent Youth Foundation of Henan Scientific Committee [134100510018]
- Innovation Scientists and Technicians Troop Construction Projects of Henan Province [2013259]
- Henan Province Key Discipline of Applied Chemistry [201218692]
- Program for Innovative Research Team (in Science and Technology) in the University of Henan Province [14IRTSTHN009]
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Novel water-soluble lanthanide complexes (Ln(IMI-DPA)(3)) have been synthesized using the task-specific ionic liquid consisting of a dipicolinic acid motif as the sensitizer of lanthanide luminescence. In Ln (IMI-DPA)(3), Ln(3+) ions are in 9-fold coordination through six carboxylate oxygen atoms and three nitrogen atoms in pyridine units, and the water molecule is excluded from the coordination sphere of the lanthanides. It is found that Ln(IMI-DPA)(3) possess bright luminescence, long luminescence lifetime in aqueous solution, high thermal stability and good water solubility. Furthermore, these complexes can be incorporated into water-soluble poly(vinyl alcohol) (PVA) matrixes to obtain highly luminescent, transparent and flexible PVA composite films. The emission colors of the films can be tuned from red, orange, yellow, light green, green to white light by regulating the concentration of the various luminescent components.
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