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Ratiometric Luminescent Sensor of Picric Acid Based on the Dual-Emission Mixed-Lanthanide Coordination Polymer
- Source :
- ACS applied materialsinterfaces. 10(50)
- Publication Year :
- 2018
-
Abstract
- Powerful explosive sensors play a key role in public security and environmental protection. Herein, we report a series of isostructural lanthanide coordination polymers [Ln2L1.5(NMP)2]n (LnL: Ln = Eu, Gd, Tb, Dy, Ho, and Er; H4L = [1,1′:4′,1″-terphenyl]-2′,4,4″,5′-tetracarboxylic acid; NMP = N-methyl-2-pyrrolidone) and mixed-Ln LnL (EuxTb1–xL, EuxGd1–xL, TbxGd1–xL, and EuxTb0.02–xGd0.98L). Luminescence studies show that both H4L and GdL emit strong fluorescence and phosphorescence at 77 K while only fluorescence at room temperature, and TbL exhibits strong Tb3+ characteristic emission, although the energy difference between the triplet excited state of H4L (20661 cm–1) and the 5D4 energy level of Tb3+ (20500 cm–1) is very small. By doping Eu3+ and Tb3+ into GdL, we obtained EuxTb0.02–xGd0.98L emitting warm white light. For TbL and Tb0.01Gd0.99L showing dual emission, upon addition of picric acid (PA) into their suspensions in Tris–HCl buffer, Tb3+ emission decreases slowly; however, the ligand-based emiss...
- Subjects :
- Lanthanide
Materials science
010405 organic chemistry
Coordination polymer
Picric acid
010402 general chemistry
01 natural sciences
Fluorescence
0104 chemical sciences
chemistry.chemical_compound
chemistry
Excited state
Physical chemistry
General Materials Science
Isostructural
Phosphorescence
Luminescence
Subjects
Details
- ISSN :
- 19448252
- Volume :
- 10
- Issue :
- 50
- Database :
- OpenAIRE
- Journal :
- ACS applied materialsinterfaces
- Accession number :
- edsair.doi.dedup.....9466039447d74637345a808a7f4397d4