Synthesis and luminescence of zinc and europium alpha-thiophene carboxylate polymer.
The zinc and europium alpha-thiophene carboxylate polymer with very strong red luminescence was prepared by rheological phase reaction method from zinc acetate, europium oxide and alpha-thiophenecarboxylic acid. Molecular weight, thermal analyses and X-ray diffraction pattern were measured. 1H NMR, 13C NMR, IR, XPS, UV, excitation and emission spectra were studied. The polymer with amorphous structure and 7.565x10(5) g/mol weight-average molecular exhibited excellent solubility in common organic solvents and better thermal stability under 270 degrees C in air. The quantum yield of the polymer in acetone was 0.6 relative to quinoline in 0.05 mol/l H(2)SO(4) solution. The energy of the pi,pi(*) excited state of C(4)H(3)SCO(2)(-) can be transferred to Eu(3+) ion resulting in emission from the 5D(0)-->(7)F(j) of Eu(3+) ion through the polymeric chains. Zn(2+) can effectively enhance the luminescence of Eu(3+) in alpha-thiophenecarboxylate polymer.
Department of Chemistry, Wuhan University, Wuhan 430072, People's Republic of China. ljyuan@whu.edu.cn
Liangjie
L
Yuan
Zicheng
Z
Li
Jutang
J
Sun
Keli
K
Zhang
D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D011108:Polymers; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics; D013876:Thiophenes / Q000737:chemistry*; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry*
D011108:Polymers; D013876:Thiophenes; D005063:Europium; D015032:Zinc