Preparation and Photoluminescence Properties of Polymer–Rare-Earth Complexes Composed of Bidentate Schiff-Base-Ligand-Functionalized Polysulfone and Eu(III) Ion

2015 ◽  
Vol 119 (29) ◽  
pp. 16403-16413 ◽  
Author(s):  
Baojiao Gao ◽  
Dandan Zhang ◽  
Tintin Don
Keyword(s):  
Schiff Base ◽  
Rare Earth ◽  
Schiff Base Ligand ◽  
Rare Earth Complexes ◽  
Photoluminescence Properties ◽  
Bidentate Schiff Base Ligand

Near-infrared luminescence and magnetic properties of dinuclear rare earth complexes modulated by β-diketone co-ligands

2020 ◽  
Vol 44 (10) ◽  
pp. 3912-3921 ◽  
Author(s):  
Ling Li ◽  
Jian Gou ◽  
Dong-Fang Wu ◽  
Yun-Juan Wang ◽  
Yao-Yao Duan ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Rare Earth ◽  
Schiff Base Ligand ◽  
Near Infrared ◽  
Rare Earth Complexes ◽  
Coordination Environment ◽  
Infrared Luminescence

The magnetic properties of complexes based on a Schiff base ligand H2L can be modulated by subtle changes in the coordination environment resulting from changes in the co-ligand substituents.

Cyclometalated Pt(ii) complexes with a bidentate Schiff-base ligand displaying unexpected cis/trans isomerism: synthesis, structures and electronic properties

2017 ◽  
Vol 46 (37) ◽  
pp. 12500-12506 ◽  
Author(s):  
A. Poma ◽  
A. Forni ◽  
C. Baldoli ◽  
P. R. Mussini ◽  
A. Bossi
Keyword(s):  
Schiff Base ◽  
Electronic Properties ◽  
Computational Methods ◽  
Schiff Base Ligand ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bidentate Schiff Base Ligand

Unexpected cis/trans isomerism in a bis-cyclometalated Pt(ii) complex is investigated by NMR, X-ray diffraction, optical, electrochemical and computational methods and rationalized.

scholarly journals Preparation of polymer–rare earth complexes based on Schiff-base-containing salicylic aldehyde groups attached to the polymer and their fluorescence emission properties

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Dingjun Zhang ◽  
Wenjin Zhao ◽  
Zhaoxuan Feng ◽  
Youzhi Wu ◽  
Caixia Huo ◽  
...  
Keyword(s):  
Schiff Base ◽  
Rare Earth ◽  
Fluorescence Intensity ◽  
Butyl Acrylate ◽  
Fluorescence Emission ◽  
Rare Earth Complexes ◽  
Functionalized Polymers ◽  
Molar Ratio ◽  
Side Chains ◽  
Fluorescent Intensity

AbstractIn this study, the salicylaldehyde hydrazone was bonded onto the side chains of poly (styrene-co-butyl acrylate), firstly obtaining a series of novel Schiff base-functionalized polymers. and using the base-containing polymers as macromolecular ligands through further reaction with EuCl3/YbCl3·6H2O, a series of polymer-rare earth complexes based on Eu(III)/Yb(III) ion were successfully prepared. The structures of the schiff base-containing polymers and their corresponding complexes were characterized by means of infrared spectra and UV spectra. The thermal properties of the functionalized polymers and complexes were investigated by TGA, and the fluorescence properties of the complexes were also researched by fluorescence spectrum. The experimental results show that the complexes have fine thermal stability likely because of the bidentate chelate effect of base-containing polymer and the conjugative effect of salicylaldehyde hydrazone group on the side chain of poly (styrene-co-butyl acrylate). More important, the salicylaldehyde hydrazone group on the side chains of poly(styrene-co-butyl acrylate) can efficaciously sensitize the fluorescence emission of the center ion due to effective intramolecular energy transfer. All the Eu(III)/Yb(III) complexes exhibit characteristic photoluminescence peaks in the visible region. The fluorescence excitation spectra of the complexes were obtained by monitoring the emission of Eu3+/Yb3+ ion at 497 nm, and the peak at 433 nm was found to be the optimal excitation peak. The concentration of salicylaldehyde hydrazone group was changed gradually with the variation of the molar ratio between the butyl acrylate and styrene (1:0.5; 1:1; 1:1.5; 1:2; 1:2.5), and the differences in their fluorescent intensity were followed, and the fluorescence intensity was very weak when the molar ratio of the butyl acrylate to styrene is equal to 1:2.5, while the fluorescence intensity reached a maximum value in the molar ratio of 1:1.

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