邻氨基苯甲酸-联吡啶-混合稀土(Eu、Tb)配合物的荧光研究

:研究用邻氨基苯甲酸铵、2 ,2’-联吡啶与氯化铕、氯化铽在水 -乙醇溶液中反应合成了邻氨基苯甲酸- 2 ,2’-联吡啶 -铕铽异核稀土配合物 ,并测定了配合物的红外光谱。红外光谱数据表明 :邻氨基苯甲酸中的羧基和氨基均与稀土离子配位 ,联吡啶中的氮也与稀土离子配位 ;由元素分析数据推测 ,配合物的化学组成式为(Eux Tb1 - x) L3L′(其中 L 为邻氨基苯甲酸 ,L′为 2 ,2’-联吡啶 ) ;在 35 1nm紫外光激发下 ,研究了配合物的荧光光谱 ,结果表明 ,Eu3 的荧光发射被 Tb3 强烈敏化 ,而 Tb3 的荧光发射被 Eu3 离子强烈猝灭     

铽-2-噻吩甲酸-邻菲罗啉三元配合物中Er3+对Tb3+的发光影响

合成了一系列异核配合物(Tb1-xErx)·L3·phen·1/2H2O(x=0.000～0.200,L为2-噻吩甲酸,phen为邻菲罗啉).对配合物进行了组成分析,摩尔电导,IR光谱及荧光激发和荧光发射光谱的测定.荧光光谱测定表明,配合物中3 对3 的发光产生猝灭作用,随着Er3 加入量的增大荧光发射强度大大减弱.     

铕-芳香族有机羧酸-邻菲罗啉配合物的合成和荧光性能的研究

合成了铕 芳香族有机羧酸 (苯甲酸、邻苯二甲酸 )和邻菲罗啉的二元、三元配合物 ,研究了它们的荧光光谱、红外光谱、紫外可见光谱。结果表明 ,铕和苯甲酸、邻苯二甲酸邻菲罗啉生成的二元、三元配合物 ,在紫外光激发下均可发出铕的特征荧光 ,且三元配合物的荧光强度明显大于二元配合物。     

邻氨基苯甲酸稀土固体配合物的光致发光

合成了一系列组成为Tb1-xYxA3(A=邻氨基苯甲酸,x=0～1.0)的固体配合物。利用红外光谱和荧光光谱研究了配合物的结构和荧光性质。红外光谱的结果表明,掺杂配合物的结构与未掺杂的邻氨基苯甲酸铽相似。荧光光谱的结果显示,Y3+对Tb3+的发光有显著的增敏作用,对荧光增敏的机理进行了探讨。     

Tb1-xLaxA3(A＝邻氨基苯甲酸根,x＝0～0.9)固体配合物的光致发光

合成了一系列组成为Tb1-xLaxA3(A＝邻氨基苯甲酸根，x=0-0.9)的固体配合物。利用红外光谱，X射线衍射和荧光光谱研究了配合物的结构和荧光性质。红外光谱的结果表明，掺杂配合物的结构与未掺杂的邻氨基苯甲酸铽相似。X射线衍射的结果表明，掺杂配合物的晶体结构发生了改变。荧光光谱的结果显示，La^3 和Tb^3 的发光有显著的增敏作用。对荧光增敏的机理进行了探讨，荧光增强效应可以解释为配合物中异核多聚结构的分子内能量转移和掺杂离子配合物与中心离子配合物之间的分子间能量转移。     

均苯三甲酸邻菲罗啉稀土配合物的合成、表征及荧光性质

分别合成了以均苯三甲酸(H3BTC)和邻菲罗啉(phen)为配体,以Sm、Eu、Tb和Dy为中心的4种稀土三元配合物,通过元素分析及稀土络合滴定确定了配合物的组成为RELL'1.5 ·2H20(L=BTC,L'= phen);配合物的红外光谱、紫外光谱和荧光光谱测定结果表明,配合物中均苯三甲酸根的羧基氧原子和邻菲罗啉的氮原子均与稀土离子配位成键;四种配合物均可发出稀土离子的特征荧光,铕、铽配合物具有良好的荧光性能,钐、镝配合物也发出较强的特征荧光.     

β-吲哚乙酸-邻菲啰啉-铽(Ⅲ)配合物荧光性质研究

为了提高β-吲哚乙酸(IA)-铽二元固态配合物的荧光性能,在乙醇水溶液体系中,以邻菲啰啉(phen)作为第二配体,合成了铽与IA、phen三元固态配合物.通过元素分析、红外光谱及荧光光谱分析,确定了配合物的组成及其成键特征,研究了其荧光性能.三元配合物组成为Tb(IA)3·phen.三元配合物的荧光强度是二元配合物的近10倍.     

铕(Ⅲ)-对溴苯甲酸-1,10邻菲啰啉荧光探针配合物的合成及性质研究

在乙醇溶液中合成了铕(Ⅲ)-对溴苯甲酸(P-BrBA)-1,10邻菲啰啉(phen)三元荧光探针配合物,结合多种分析手段对配合物进行了结构表征。元素分析、差热-热重分析初步推测配合物化学组成为Eu(P-BrBA)₃phen·H₂O。分析其电导率,确定配合物为非离子型。红外光谱显示,配体(对溴苯甲酸)形成配合物后出现了羧酸盐特有的反对称伸缩振动吸收峰ν₍as₍(—COO—)))=1587.08 cm^-1和对称伸缩振动吸收峰ν₍s₍(—COO—)))=1427.59 cm^-1,表明配体以羧酸根的形式与稀土离子配位,同时与1,10-邻菲啰啉中的N原子形成了稳定的化学键。紫外吸收光谱测定稀土配合物的最大吸收峰位于290 nm处,且吸收峰位移很小,表明配体对配合物共轭π-π^*跃迁影响不大。在室温条件下测得配合物的发射荧光光谱在618 nm处⁵D₀—^...     

N-(2-羟苄基)-DL-α-苯丙氨酸邻菲咯啉稀土三元配合物的合成、表征及抑菌活性研究

以稀土氯化物、N-(2-羟苄基)-DL-α-苯丙氨酸与邻菲咯啉为原料,在混合溶剂中合成了四种新的配合物,通过元素分析、摩尔电导、红外光谱、紫外光谱和差热-热重分析等手段确定配合物的通式为[RE(sphe)(phen)2]·Cl·3H2O(式中RE=La、Nd、Sm、Gd,sphe=N-(2-羟苄基)-DL-α-苯丙氨酸根,phen=1,10-邻菲咯啉),并对配合物的抑菌活性进行了研究.     

2-噻吩乙酸邻菲啰啉铕、铽配合物的合成表征及荧光性能研究

合成了以Eu3 ,Tb3 及Eu3 ,Tb3 掺杂RE3 (La3 ,Gd3 ,Y3 )为中心,以2-噻吩乙酸和1,10-邻菲啰啉为配体的两个系列8种同核与掺杂稀土固体配合物.对其进行了稀土及C、H和N元素分析、摩尔电导、热谱、红外光谱、核磁共振氢谱的测定及荧光性能研究.确定了配合物的组成为REL3L′和RE0.5Ln0.5L3L′(RE=Eu,Tb;Ln=La,Gd,Y;L=2-噻吩乙酸;L′=1,10-邻菲啰啉,在常温下测定了它们的固态粉末荧光光谱,发现掺杂离子(La3 ,Gd3 ,T3 )使稀土Eu3 离子发光明显增强,讨论了掺杂稀土离子对铕、铽配合物的发光影响.     

Thermal Stability and Luminescence Properties of Eu^3＋ and Tb^3＋ Complexes with a Silica Matrix by Sol-Gel Method

Ternary complexes of europium and terbium with benzoic acid and 1, 10-phenanthroline [RE(BA)3phen] (BA=benzoate phen=1,10-phenanthroline) were introduced into a silica matrix by sol-gel method. The thermal stability and luminescence behavior of the complexes in silica gels were studied in comparison with the corresponding solid-state complexes by thermal decomposition, excitation and emission spectra. The thermal stability of the complexes is enhanced in silica gel matrix and the luminescence remaines unchanged.     

稀土配合物[REL3(4-picNO)H2O]的合成与表征

合成了2,3-二氯异丁酸根和4-甲基吡啶氮氧化物稀土三元配合物(RE=La、Ce、Pr、Nd、Sm、Eu).通过元素分析、红外、紫外、荧光、X射线粉末衍射、XPS、热分析以及摩尔电导等分析手段,确定了配合物的组成为[REL3(4-picNO)H2O](L= CH3C2H2Cl2COO -),并对它们的性质进行了讨论.     

Syntheses and Characterization of Binuclear Complexes Tb（1-x）Eux（TTA）3 Phen

Rare earth ternary complexes Tb1-xEux（TTA）3Phen（x=0,0.25,0.5,0.75,1.0）were synthesized and characterized by DTA-TG,XRD and infrared（IR）.The photophysical properties of these complexes were studied in detail using ultraviolet absorption spectra and fluorescent spectra.Ultraviolet absorption showed that the energy absorption of the complexes mostly came from ligands.Infrared spectra of Tb1-xEux（TTA）3Phen complexes were similar to the pure complexes.TG curves proved that the complexes were stable.Tb3＋ emission was almost quenched and the Eu3＋ emission was enhanced by codoping the complexes.The Tb3＋ ion acted as an energy transfer bridge that helped energy transfer from poly（N-vinylcar-bazole（PVK）to Eu3＋.In addition,their PL and EL properties were systematically studied.     

Microwave assisted synthesis, spectroscopy and biochemical aspects of lanthanum(Ⅲ) and praseodymium(Ⅲ) complexes with oxadiazole functionalised dithiocarbazinates

The new lanthanum (Ⅲ) and praseodymium (Ⅲ) complexes of the general formula [Ln(L)3] (Ln=La(Ⅲ) or Pr(Ⅲ); LK=potassium salt of dithiocarbazinates) were prepared by both, conventional thermal and by the use of microwave technology. Elemental analyses, elec-trical conductance, magnetic moment and electronic, infrared, far-infrared, 1H and 13C NMR spectral studies were used to characterize the complexes. The molecular weights of few complexes were determined by FAB-mass spectra. Nephelauxetic ratio, covalency parameter and bonding parameter for these complexes were also calculated. The probable structures of the complexes were proposed. The antifungal and antibacterial activities of the complexes were evaluated. The activities were correlated with the structures of the compounds.     

Growth and optical properties of Pr~(3+):La_2CaB_(10)O_(19) crystal

Pr3+ doped La2CaB10O19 crystal were grown by the top-seeded solution growth(TSSG) method.The absorption spectra,emission spectra and lifetime were measured at room temperature.The J-O parameters(Ωt,t=2,4,6),the radiative transition probabilities AJ,J',oscillator strengths PJ,J',radiative lifetime τ,fluorescence branch ratios βJ and the value of integrated emission cross section have also been calculated.Five main absorption bands,3H4 to 3P1+3P2,3P0,1D2,3F3 + 3F4 and 3F2,were observed in the absorption spect...     

Sm(Ⅲ),Eu(Ⅲ)-丙烯酸-8-羟基喹啉三元配合物的合成及荧光性质研究

用三异丙氧基钐（铕）与８－羟基喹啉、丙烯酸反应合成具有良好荧光性质的稀土三元配合物,通过元素分析、红外光谱、紫外光谱证实其分子结构,并进行荧光光谱、热分析测试,发现配合物具有较好的荧光性质。     

Studies on some lanthanide（Ⅲ） complexes with 4-hydroxyantipyrine

Seven new lanthanide（Ⅲ） complexes with 4-hydroxyantipyrine were synthesized. These complexes were characterized by elemental analysis, molar conductance, magnetic moment measurements, FT-IR, electronic and 1HNMR spectra, X-ray powder diffraction, and thermogravimetric studies. The ligand, 4-hydroxyantipyrine （hap）, contained carbonyl oxygen and hydroxyl oxygen as potential donor sites. On coordination, deprotonation occurred and as a result, hap acted as a monobasic bidentate ligand. A coordination number 6 was assigned to the lanthanide（Ⅲ） ions in these complexes with orthorhombic structure. All the complexes were thermally stable-150℃ and underwent decomposition in three stages with the formation of Ln2O3 as the final residues.     

N-对甲苯基N’-(氨基对苯磺酸钠)硫脲的合成及其分析应用

合成了新试剂N-对甲苯基-N’-(氨基对苯磺酸钠 )硫脲 (PMPT) ,经红外、紫外、核磁和元素分析等测试 ,确定了其组成和结构。并研究测定了试剂与 40多种常见离子的反应及其络合物的表观摩尔吸光系数 ,表明它可作为Cu2 + (m =0.0 15 μg ,c =0.5 0 μg/mL) ,Ag+ (m =0 10 μg ,c =3 3μg/mL)的新鉴定试剂和光度法测定Cu2 + (ε36 5 5 =8.36× 10 4)的新显色剂。     

Exploration of Reactivity of Eu(TTA)2(phen)(MA)

The reactivity of Eu(TTA)2(phen)(MA) (HTTA=2-thenoyltrifluoroacetone, MA=maleic anhydride) was studied. A series of products were prepared by direct polymerization, suspension polymerization, and alternate suspension and solution copolymerization with the styrene. And then we reactivity of these products were studied. The complexes were investigated and characterized by X-ray Diffraction (XRD), gel permeation chromatography (GPC) and fluorescence spectrophotometer. Although high polymerization degree is not found in the exploration of reactivity, it is found that the fluorescent intensity of complexes prepared by suspension polymerization increases significantly compared with the original particles, which is five times higher than that of the pure rare earth complex.     

Effects of Polar Organic Solvent on Separation of Y （edta）^-／Nd （edta）^- Complexes on Polyacrylic Anion Exchangers

The use of polar organic solvents for the separations of rare earth elements ( Ⅲ ) is effective especially for their extensive separations despite the solubility limitations.The study shows that polyaerylate anion exchangers, particularly the weakly basic, gel anion exchanger Ambedite IRA 68,can be applied to the separation of rare earth complexes with EDTA in H20-metthanol and H20-ethanol systems.In most cases the determined distribution coefficients of Ln^3 complexes with EDTA in mixed media like water-methanol on polyacrylate anion exchangers are larger than those in pure water media.