Studies on new phosphors prepared by hybridization of lanthanides with polyctown ethers

镧系元素与聚城醚杂化制备新型荧光粉的研究

基本信息

批准号：
62550565
负责人：
ADACHI Gin-ya
金额：
$ 1.22万
依托单位：
OSAKA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

Fluorescence of Eu^<2+>-polycrown complexes has been studied. Blue bright emission was observed from the complex by 300nm excitation. Divalent europium ions in the complex were stable in air.A Eu^<2+> complex with poly(2-methacryloyloxymethyl-15-crown-5) was prepared by bulk polymerization of methacryloyloxymethyl-15-crown-5 using AIBN ( , '-Azobisisobutyronitrile) as an initiator at 60゜C.Bright emission was observed at 435nm by 400nm excitation with an intensity of 6.6% of that for CaWO_4:Pb (NBS 1026). The brightest emission was obtained when five crown rings in the polymer held one Eu^<2+> ion in the complex.Methacryloyloxymethyl-15-crown-5-methyl methacrylate copolymer was obtained by bulk copolymerization of methacryloyloxymethyl-15-crown-5 and methyl methacrylate using AIBN as an initiator. Methacryloyloxymethyl-15-crown-5 comonomer was synthesized by esterification of hydoxymethyl-15-crown-5 with methacryloyl chloride in chloroform using triethylamine.Emission of which intensity is 23.1% of that for CaWO_4:Pb was observed at 435nm under uv excitation. The Eu^<2+>-Sr^<2+> copolymer complex was more stable in the air and gave brighter emission than the Eu^<2+> copolymer complex did.E$fect of low molecular oligoethers on fluorscence properties of Eu^<2+>-poly-methacryloyloxymethyl-15・C・5 were studied. Eu^<2+>-PMA-15・C・5-15・C・5 complex yielded brighter emission than Eu^<2+>-PMA-15・C・5 complex did.

研究了Eu^<2+>-多冠配合物的荧光，在300nm激发下观察到配合物中的二价铕离子在空气中稳定。Eu^<2+>与聚(2)配合物。 -甲基丙烯酰氧基甲基-15-冠-5)是通过使用AIBN ( , '-偶氮二异丁腈）作为引发剂，在 60°C 下，在 400nm 激发下在 435nm 处观察到明亮的发射，其强度为 CaWO_4:Pb（NBS 1026）的 6.6%。当聚合物中有五个冠环时获得最亮的发射。中含有一个Eu^<2+>离子以甲基丙烯酰氧基甲基-15-冠-5和甲基丙烯酸甲酯为原料，以AIBN为引发剂，通过羟甲基-5-冠酯化反应合成甲基丙烯酰氧基甲基-15-冠-5共聚单体，得到甲基丙烯酰氧基甲基-15-冠-5-甲基丙烯酸甲酯共聚物。 15-冠-5带使用三乙胺在氯仿中甲基丙烯酰氯。在紫外激发下，在435nm处观察到发射强度是CaWO_4:Pb发射强度的23.1%。Eu^2+-Sr^2+共聚物络合物在空气中更稳定。并给出比Eu^2+共聚物复合物更亮的发射。低分子低聚醚对荧光性质的影响研究了Eu^<2+>-聚甲基丙烯酰氧基甲基-15·C·5 配合物，Eu^<2+>-PMA-15·C·5-15·C·5 配合物比Eu^<2+> 产生了更亮的发射。 -PMA-15·C·5复合物做到了。