Monochromatic light-emitting copolymer of methyl methacrylate and Eu-complexed 5-acrylamido-1,10-phenanthroline

Monochromatic light-emitting copolymer of methyl methacrylate and Eu-complexed 5-acrylamido-1,10-phenanthroline
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甲基丙烯酸甲酯与Eu络合的5-丙烯酰氨基-1,10-菲咯啉的单色发光共聚物

DOI:
10.1016/j.dyepig.2013.04.001
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发表时间:
2013-09
期刊:
影响因子:
4.5
通讯作者:
Li Bo-Geng
Li Bo-Geng
中科院分区:
材料科学2区
文献类型:
--
作者:
Xu Cun-Jin;Wan Jin-Tao;Li Bo-Geng

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本文提出了一种制备具有优异光致发光性能的含铕聚合物的有效方法,即通过2-噻吩甲酰三氟丙酮(HTTA)和5-丙烯酰胺基-1,10-邻菲咯啉与甲基丙烯酸甲酯(MMA)的共聚反应制备含铕聚合物。采用FT-IR、UV-Vis、1H NMR、GPC、TGA、DSC等手段对共聚物进行了表征。结果表明,该共聚物是易溶的,并具有优异的热稳定性,具有高的玻璃化转变温度和分解温度分别为125 ° C和335 °C。在紫外光激发下,样品在612 nm处产生了强烈的红光发射,对应于Eu(III)离子的5D 0 → 7 F2跃迁。一些含铕单体的发光寿命和效率可以大大提高共聚。特殊的微环境,其中Eu-配合物单元均匀地结合到聚合物链上并被聚合物链包围,似乎是负责共聚物的发光性能的改善。此外,著名的Judd-Ofelt理论的Eu 3+配合物的发光性质的适用性也进行了研究。
We present an effective approach to prepare Eu-containing polymer with excellent photoluminescence properties through the copolymerization of highly luminescent Eu-complex monomer featuring 2-thenoyltrifluoroacetone (HTTA) and 5-acrylamido-1,10-phenanthroline with methyl methacrylate (MMA). The copolymer was characterized by FT-IR, UV–Vis,1H NMR, GPC, TGA, and DSC. The results reveal that the copolymer is readily soluble, and possesses excellent thermal stability, with high glass transition and decomposition temperatures of 125 and 335 °C, respectively. Intense red emission peaked at 612 nm, corresponding to the5D0→7F2transition of Eu(III) ions is recorded under UV excitation. The luminescence lifetimes and efficiencies of some Eu-containing monomers could be greatly enhanced upon copolymerization. The special microenvironment, in which the Eu-complex units are uniformly bonded to and surrounded by the polymer chain, appears to be responsible for the improvement of the luminescence properties for the copolymer. Moreover, the applicability of the well-known Judd–Ofelt theory to the luminescence properties of Eu3+complexes is also investigated.
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