Eu（Ⅲ） Complex-doped PMMA with Fast Radiation Rate and High Emission Quantum Efficiency

Two Eu（Ⅲ） complexes,（tris-4,4,4-trifluoro-1-phenyl-1,3-butanedione）（1,10-phenanthroline）europium（Ⅲ） [Eu（tpb-H） 3（phen）] and（tris-4,4,4-trifluoro-1-phenyl-1,3-butanedione）（2,2＇-bipyridine）europium（Ⅲ）[Eu（tpb-H） 3（bipy）] were synthesized from bi-dental oxygen and nitrogen ligands.Luminescent polymers were fabricated by incorporating deuterated Eu（Ⅲ） complexes in poly（methylmethacrylate）（PMMA） matrixes.Luminescent PMMA containing Eu（tpb-D） 3（phen） exhibited relatively higher quantum yield[Φ,（48.7±4）%],faster radiation rate（k r,7.49×10 2 s-1）,sharper red emission[full width at half maximum（FWHM）,6.3 nm] and larger stimulated emission cross-section（SEC,1.29×10-20 cm 2）.The value of SEC is the same order as that of Nd-glass laser for practical use.Additionally,the thermal properties of Eu（tpb-H） 3（phen）,Eu（tpb-H） 3（bipy）,Eu（tpb-D） 3（phen）-PMMA,and Eu（tpb-H） 3（bipy）PMMA were studied,indicating that the Eu（Ⅲ） complexes and luminescent PMMA can be used for a long-term period in high temperature environment.Prepared luminescent polymers including Eu（tpb-D） 3（phen） have promising applications in novel organic Eu（Ⅲ） devices,such as the high-power laser materials and optical fibers.