Eu（TTA）3·1／2（4，4′－bipyN_2O_2）配合物的发光光谱

在７７Ｋ下测定了Ｅｕ（ＴＴＡ）３·１／２（４，４′－ｂｉｐｙＮ２Ｏ２）配合物的激发光谱、发光光谱和时间分辨光谱。光谱数据表明，在标题配合物中存在化学环境不同的两种Ｅｕ３＋格位，但它们的局部对称性都属于Ｃ２Ｖ点群，这可能表明该配合物的激发态电子结构稍有不同     

铕（Ⅲ）—β—二酮—4,5—二氮芴—9—酮三元配合物的合成

铕（Ⅲ）┐β┐二酮┐４，５┐二氮芴┐９┐酮三元配合物的合成成义祥徐端钧＊徐元植（浙江大学化学系杭州３１００２７）关键词铕，β－二酮，二氮芴酮，三元配合物，合成，荧光光谱１９９７－０３－３１收稿，１９９７－０７－１５修回噻吩甲酰三氟丙酮（ＴＴＡ）和苯甲...     

溶胶—凝胶合成（Mg,Ca）O—SiO2：Eu^3＋,Bi^3＋发光体及其发光行为

以Ｍｇ（ＮＯ３）２，Ｃａ（ＮＯ３）２，Ｅｕ（ＮＯ３）３，Ｂｉ（ＮＯ３）３和Ｓｉ（ＯＣ２Ｈ５）４为反应物，采用溶胶－凝胶法，在比较低的温度，首次合成０．７０１ｍｏｌＭｇＯ－０．１７５ｍｏｌＣａＯ－１．２５ｍｏｌＳｉＯ２：０．０６ｍｏｌＥｕ＾３＋，０．００２ｍｏｌＢｉ＾３＋（加入Ｌｉ＾＋作为电荷补偿剂）发光体，得到了最佳合成条件，研究了由溶胶向凝胶转变和凝胶向发光晶体的转变过程，探讨了发光体在不同激光     

Coating Carbon Nanotubes with Europium Oxide

Carbon nanotubes (CNTS) coating with europium oxide by a simple method is reported in this letter for the first time. The CNTS were refluxed in a solution of nitric acid containing europium nitrate, and the pH value was subsequently ajusted with ammonia solution. At last, the mixture was filtered and annealed. The TEM micrograph showed that the CNTS were covered with a uniform thin layer with thickness of about 15 nm. The XRD results revealed that the CNTS were coated with europium oxide.     

The reactions of phenylacetylene with naphthalene complexes of europium and ytterbium. Molecular structure of [IYbC≡CPh(DME)2]2

Reactions of naphthaleneeuropium and naphthaleneytterbium, C₁₀H₈Ln(DME) (Ln = Eu or Yb), with phenylacetylene are accompanied by the formation of the C-C bond and yield the complexes of composition Ph₂C₄H₂Ln(DME)₂. Hydrolysis of the Ph₂C₄H₂Ln(DME)₂ complexes affords a mixture of isomers of 1,4-diphenyl-1,3-butadiene. Reactions of C₁₀H₈[LnI(DME)₂]₂ with PhCCH yield mixed iodine-ethynyl complexes [ILn(-CCPh)(DME)₂]₂. According to the data of X-ray diffraction analysis, the ytterbium complex consists of two YbI(DME)₂ units bonded through two bridging CCPh groups. The crystals of this complex belong to the space groupP2₁/c. The central cyclic Yb-C-Yb-C fragment is planar; the C(I)-Yb(I)-C(I) angle is 86.4(3)°. The Yb-C bond lengths are 2.584(8) and 2.603(9) Å.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 2101–2104, August, 1996.     

Temperature-sensitive luminescence of tris (β-diketone) europium chelates for monitoring high-speed cationic photopolymerizations

The temperature-dependent luminescence of tris (β-diketone) chelates of europium was used for in situ temperature measurements during cationic photopolymerizations of vinyl ethers. These molecular-level luminescent probes provided a real-time, noninvasive method for monitoring temperature during these high-speed polymerizations. Two specific probes, tris (benzoyl-1, 1, 1-trifluoroacetone) europium and tris (1,1,1,5,5,5,-hexafluoroacetylacetone) europium, met several stringent spectral and performance requirements for application in our system. The luminescence from these probes exhibits a reproducible temperature dependence over a wide temperature range and is not sensitive to changes in viscosity. In situ temperature profiles obtained using this novel technique verified the importance of thermal effects during these highly exothermic photopolymerizations. These studies have demonstrated the utility of the tris(β-diketone) europium chelates for characterizing the temperature during high-speed photopolymerizations that cannot be monitored using conventional techniques. © 1995 John Wiley & Sons, Inc.     

Preparation of Europium Induced Conformation—specific anti—calmodulin Monoclonal Antibody

Monoclonal antibody technique was employed to detect the conformational difference of CaM induced by metal ions. A trivalent europium ion induced conformation-specific anti-calmodulin monoclonal antibody was successfully prepared with europium-saturated calmodulin as antigen.     

ICP－AES法测定氧化铕中14种数量稀土杂质

采用ＩＣＰ－ＡＥＳ单道扫描光谱仪详细考察了十四种被测稀土杂质元素的４７条灵敏分析线的谱线轮廓及基体Ｅｕ的背景谱线轮廓，从而选定基体干扰小，灵敏度高的分析线及扣除背景的合适位置；试验了酸度，载气流量，观测高度，射频发生器功率等对信号强度和基体干扰程度的影响，采用基体匹配法校正基体对测定的影响，建立了氧化铕中１４种稀土杂质的直接测定法。已用于出口产品的分析和标准试样的定值测定，得到了满意的结果。     

固体Hp[EuA_4]配合物异构体的研究

合成了化学式为Hp[EuA_4]的配合物(A=对甲氧基苯甲酰苯甲酰甲烷;Hp=六氢吡啶),用X-射线粉末衍射法,荧光光谱及热谱等方法研究了它们的性质,并发现由于合成条件(反应物的摩尔投量比,反应温度,所用溶剂)不同,在固体Hp[EuA_4]配合物中配体空间的排布不同,而有不同的异构体存在。     

Gd_3Al_5O_(12)∶Eu~(3+)柠檬酸盐硝酸盐燃烧法合成及其发光性能研究

采用柠檬酸盐硝酸盐燃烧法,在较低的温度(900℃)下成功地合成单一晶相Gd3Al5O12∶Eu3+发光粉体,紫外激发荧光光谱分析表明,粉体615 nm和593 nm荧光发射源于Eu3+的5D0-7F2和5D0-7F1跃迁.该方法中各工艺条件(如pH值、柠檬酸/金属离子比、煅烧温度)对Gd3Al5O12∶Eu3+发光性能均有影响,通过试验得出了获得最佳发光性能荧光粉体的工艺参数.