Preparation and characterization of novel transparent Eu(AA)₃‐polyurethane acrylate copolymeric materials

Abstract

The rare earth (RE) salts Eu(AA)3 (AA: acrylic acid group) and the macromonomers of polyurethane acrylate (MPUA) containing vinyl groups at the end of the chain are prepared for achieving a novel transparent Eu(AA)3‐polyurethane acrylate (Eu‐PUA) materials by copolymerization. The structure and properties of the Eu(AA)3 and the Eu‐PUA have been systematically characterized by infrared spectroscopy (FTIR), proton and carbon nuclear magnetic resonance (1H‐NMR, 13C‐NMR), thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), and fluorescence spectrophotometer. It is proved that the Eu(AA)3 have been successfully bonded onto the molecular chains of the polyurethane acrylate and the glass transition temperature (Tg) of the polyurethane acrylate increases at the presence of Eu(AA)3. In addition, the Eu‐PUA materials show favorable thermal stability and transparence. Typically, the fluorescence spectra show that the strongest fluorescence emission peak of the Eu‐PUA material appears at 614 nm at the excitation wavelength of 395 nm. This demonstrates that such material can be applied to functional optical materials in the future. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

ZnS:Eu @ZIF-8: Selective formation of ZnS:Eu QDs within a zinc methylimidazole framework for chemical sensing applications

“…The grain size of ZnS:Eu quantum dots is 1.24 nm (As shown in Table 1 ),However, as far as the data is concerned, the diffraction intensity of this measured XRD data is very low and the error in the calculation may be a little larger. These findings were consistent with the reported structure of ZIF-8, demonstrating that the encapsulation of ZnS:Eu QDs into MOFs did not affect the crystal integrity of the carriers and indicating that ZIF-8 was synthesised successfully [ [38] , [39] , [40] , [41] , [42] ] . Moreover, the diffraction peaks of the ZnS:Eu@ZIF-8 composites were similar to those of pure ZIF-8.…”

Studies on the Solubility of Bonded-Rare Earth Complexes and Fluorescence Properties of their Copolymers

“…3 and 4. It can be noted that the characteristic fluorescence peaks of Eu 3+ ions appear at about 590nm, 614nm, 648nm and 693nm, respectively belong to the transitions of 5 D 0 → 7 F 1 , 5 D 0 → 7 F 2 , 5 D 0 → 7 F 3 and 5 D 0 → 7 F 4 , this is similar to the previous observation [8]. Of the transitions, the magnetic dipole transition 5 D 0 → 7 F 1 and electric dipole transition 5 D 0 → 7 F 2 have higher fluorescence intensities.…”

Preparation of Eu0.075Tb0.925-Metal Organic Framework as a Fluorescent Probe and Application in the Detection of Fe3+ and Cr2O72−

“…As shown in the figure, the 2θ diffraction angle peak positions of the simulated XRD pattern and the synthesised samples Eu-MOF, Tb-MOF, and Eu 0.075 Tb 0.925 -MOF are the same, and there are sharp peaks at the diffraction angles from 9 to 10. At the same time, the diffraction peaks 9 to 10 of the crystal synthesised by Silva et al [36] are basically the same, indicating that the synthesised Eu 0.075 Tb 0.925 -MOF has high purity and good crystallinity [36][37][38][39].…”