共查询到18条相似文献,搜索用时 104 毫秒
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合成了4种两亲性的3-苯基-4-苯甲酰基-5-异恶唑酮合稀土酸十六烷基吡啶配合物:Ln(PBI)4。HDP(Ln=Sm,Eu,Tb,Dy)。用元素分析,红外光谱,差热-热重谱,紫外-可见光谱对其进行了表征。 相似文献
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合成了三(3-苯基-4-苯甲酰基异唑酮-5)-乙醇-水合铕的配合物。有关鉴定和元素分析结果表明:该配合物的分子式为[Eu(PBI)3(C2H5OH)(H2O)]·H2O,其中3-苯基-4-苯甲酰基异唑酮-5简记为HPBI,是一种新型高酸度的β-双酮。用X射线单晶衍射法测定了[Eu(PBI)3(C2H5OH)(H2O)]·H2O的晶体结构,结果表明,该晶体属单斜晶系,P21/a空间群,晶胞参数:a=1.5586(9)nm,b=2.1297(7)nm,c=1.604(1)nm,β=117.97(5)°,V=4.703(9)nm3,Z=4.中心离子铕为八配位,其配位多面体为畸变的双帽三棱柱。配位的8个氧原子分别来自3个PBI配体中的6个氧、1个溶剂化乙醇分子中的氧和1个水分子中的氧,Eu—O配位键平均键长0.2391(4)nm。晶体结构中还存在1个未配位的水分子。该水分子、配位水分子、乙醇分子与配体PBI中的N原子之间均存在强的氢键作用。同一PBI基团内配位氧之间的平均距离为0.2808nm。 相似文献
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强绿荧光铽-异丁酰基吡唑啉酮配合物的合成、荧光性能及LB膜李琴,周德建,姚光庆,黄春辉S.UmetaniM,Matsui(北京大学稀土材料化学及应用国家重点实验室,北京,100871)(日本京都大学化学研究所)关键词铽,1-苯基-3-甲基-4-异丁酰... 相似文献
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报道标题化合物La(PMBP)_3(H_2O)_2,Hpmbp=C_(17)H_(14)N_2O_2的合成及晶体结构,晶体属于单斜晶系,空间群C2/c,晶体学数据:a=24.744(5),b=16.325(6),c=25.871(5),β=105.44(3)°,V=10073(2)3,M_r=1006,Z=8,D_x=1.328g/cm~(-3),μ=9.042cm~(-1),F(000)=4094。最终偏离因子R=0.049,R_w=0.059。分子中La(Ⅲ)与8个氧原子配位形成三角十二面体构型,La-O平均键长为2.496(2)。 相似文献
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镉(Ⅱ)-1-苯基-3-甲基-4-苯甲酰基-吡唑啉酮-5配合物吸附波的研究 总被引:1,自引:0,他引:1
在pH4.8的HAc-NH_(4)Ac介质中,Cd(Ⅱ)与1-苯基-3-甲基-4-苯甲酰基-吡唑啉酮-5(PMBP)生成配合物,于-0.67V(vs.SCE)出现一尖锐、灵敏的极谱波。镉含量在0.001~1.μg/mL范围内与峰高成线性关系。用多种电化学方法研究了极谱波的性质及电极反应机理,证明-0.67V处的极谱波为配合物吸附波,峰电流由中心离子Cd(Ⅱ)还原产生。配合物组成为Cd(Ⅱ):PMBP=1:1。试验了30多种离子对峰电流的影响,用SrSO_4共沉淀分离Pb(Ⅱ),再经巯基棉分离其它干扰离子。用于矿样中镉的测定,结果满意。 相似文献
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以1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮(Hpmbp)和4,4′-二甲基-2,2′-联吡啶(dmbipy)为配体合成了一类单核稀土配合物[Ln(pmbp)3(dmbipy)]·C2H5OH,其中 Ln=Tb (1-Tb)、Ho (1-Ho)、Er (1-Er)、Tm (1-Tm)。结构表征显示该类配合物由稀土金属离子与3个pmbp-配体、1个dmbipy配体配位而成,同时存在一分子非配位的乙醇。Ln3+离子的配位环境均接近于三角十二面体构型。荧光测试表明,1-Tb、1-Ho、1-Er和1-Tm均表现出了相应稀土离子的特征发射峰。此外,利用密度泛函理论计算分析了Hpmbp配体、dmbipy配体及稀土配合物的HOMO-LUMO信息。 相似文献
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以1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮(Hpmbp)和4,4′-二甲基-2,2′-联吡啶(dmbipy)为配体合成了一类单核稀土配合物[Ln(pmbp)3(dmbipy)]·C2H5OH,其中Ln=Tb (1-Tb)、Ho (1-Ho)、Er (1-Er)、Tm (1-Tm)。结构表征显示该类配合物由稀土金属离子与3个pmbp-配体、1个dmbipy配体配位而成,同时存在一分子非配位的乙醇。Ln3+离子的配位环境均接近于三角十二面体构型。荧光测试表明,1-Tb、1-Ho、1-Er和1-Tm均表现出了相应稀土离子的特征发射峰。此外,利用密度泛函理论计算分析了Hpmbp配体、dmbipy配体及稀土配合物的HOMO-LUMO信息。 相似文献
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Vijay K. Manchanda Prasanta K. Mohapatra R. Veeraraghavan 《Analytica chimica acta》1996,320(2-3):151-154
In the presence of tri-n-octyl-phosphine (TOPO) oxide, 3-phenyl-4-benzoyl-5-isoxazolone (PBI) has been found to be a promising chelate extractant for the partitioning of actinides from acidic nuclear waste solutions. Quantitative extraction of Pu and U is possible in the nitric acid concentration range 1–6 M, whereas Am can be extracted only from solutions with an acidity
. Extraction studies of Am and U under varying loading conditions are also carried out and conditions for quantitative stripping are arrived at. 相似文献
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在pH=5.0的HAc-NaAc介质中,Nb(V)与1-苯基-3-甲基-4-苯甲酰基-吡唑啉酮-5(PMBP)生成络合物,于-0.96V(us.SCE)出现一尖锐的极谱波.在滴汞电极上用示波极谱仪或在悬汞电极上测吸附伏安曲线.峰电流与Nb(V)浓度分别在0.0075~0.80μg/mL及0.000075~0.0075μg/mL范围内呈线性关系.实验了30多种离子的干扰影响,经苯肿酸分离后用于钢中Nb(V)的测定.检出限为0.00003μg/mL.溶液可稳定96h以上.用多种电化学方法研究了电极反应机理. 相似文献
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双亲性邻苯二甲酸正十八醇单酯稀土配合物的合成、发光、能量传递及成膜性能 总被引:1,自引:0,他引:1
自从VonHansKuhn[1]首次发表了关于稀土配合物LB膜的研究以来,随着材料科学的不断发展,功能稀土配合物LB膜以其在导电[2,3]、非线性光学[4,5]、磁学[6,7]和光学[8,9]等领域中的优异性能愈来愈引起人们的注意,并取得了可喜的进展... 相似文献
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The liquid extraction of 14 lanthanoids with a 4-benzoyl-3-phenyl-5-isoxazolone (HPBI) alone in CHCl3 as a diluent from perchlorate medium at constant ionic strength μ = 0.1 is investigated. The synergistic solvent extraction of five selected lanthanoid ions (La3+, Nd3+, Eu3+, Ho3+ and Lu3+) with 4-benzoyl-3-phenyl-5-isoxazolone (HPBI) and 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis-(dimethylphosphinoylmethoxy)calix[4]arene, (S) in CHCl3 has been studied too. The stoichiometry of the extracted species was characterised by a classical log–log plot analysis. It was found that the composition of the extracted species with HPBI are Ln(PBI)3 and in the presence of the phosphorus-containing calix[4]arene the lanthanoid ions have been extracted as [Ln(PBI)3S2]. The values of the equilibrium constants and the separation factors have been calculated. The influence of the synergistic agent on the extraction process has been discussed. 相似文献
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Based on thermal stability and volatility of 1-phenyl-3-methyl-4-benzoyl-5-pyrazone (PMBP) chelate, a novel method was described for the determination of Cr(III) and Cr(VI) by low-temperature electrothermal vaporization (LETV) combined with inductively coupled plasma mass spectrometry (ICP-MS). It was found that Cr(III) could be rapidly formed in a graphite furnace, and quantitatively vaporized into ICP at a relatively low temperature of 1000 °C with the use of PMBP as a chemical modifier, while Cr(VI) was retained in the graphite tube. Thus, the separation of Cr(III) and Cr(VI) could be realized. The main factors affecting the formation and vaporization of Cr(III)-PMBP chelate were investigated in detail. Under the optimized conditions, the detection limit of Cr(III) for this method was 0.031 ng mL−1 and the relative standard deviation (RSD) for 1.0 ng mL−1 Cr(III) was 5.3% (n = 9, v = 10 μL). The linear range of calibration curve spanned three orders of magnitude. The proposed method was applied to the determination of Cr(III) and Cr(VI) in water samples with satisfactory results. 相似文献
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合成了13种1,5-双(1′-苯基-3′-甲基-5′-吡唑啉酮-4′)-戊二酮-[1,5](BPMPPD)和溴化十六烷基吡啶盐(CPB)的稀土配合物.研究了配合物的红外光谱、紫外可见光谱、差热-热重谱、荧光光谱、核磁共振谱及摩尔电导等性质,发现配合物属离子型缔合物CP+[Ln(BPMPPD)2]-.Pr、Nd、Ho、Er、Tm配合物发生超灵敏跃迁.配合物的热分解温度具有"四分组"效应,Sm、Eu、Tb、Oy为线性荧光。 相似文献
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Synergistic solvent extraction of 14 lanthanides with mixtures of 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one (HP) and the
crown ethers (S), 18-crown-6, benzo-18-crown-6 or dibenzo-18-crown-6 from an aqueous chloride medium with the constant ionic
strength of 0.1 mol dm−3 was investigated using benzene as a diluent. The composition of the species extracted was determined as LnP3 · S. The addition
of a crown ether to the chelating extractant produced rather significant synergistic effects. On basis of experimental data,
values of equilibrium constants, synergistic coefficients, and separation factors were calculated. 相似文献