5-甲基苯并三唑-1-乙酸铕三元配合物的合成及表征

以5-甲基-苯并三唑-1-乙酸和1,10-邻菲啰啉为配体,采用溶液法合成了一种铕配合物。通过元素分析、配位滴定、摩尔电导率、红外光谱和紫外光谱对其进行表征。其组成可能为Eu(L)3phen·3.5H2O(HL=5-甲基-苯并三唑-1-乙酸,5-mbtaa;phen=1,10-邻菲啰啉)。使用热分析和荧光光谱研究了配合物的性质。热分析结果显示:铕配合物具有较好的热稳定性。荧光光谱显示:该配合物发出Eu(Ⅲ)特征荧光,并且5-甲基-苯并三唑-1-乙酸是较好的敏化剂。     

铽、镝-3-噻吩乙酸二元、三元配合物的合成及表征

合成了四种新型的铽、镝的二元、三元配合物.通过元素分析、EDTA配位滴定分析表明其通式为RETh3·2H2O,RETh3phen(RE=Dy,Tb;Th=3-噻吩乙酸根;phen=1,10邻菲啰啉);对配合物进行了紫外光谱、红外光谱、荧光光谱、热重分析.结果表明,二元配合物在100℃左右失去结晶水,三元配合物具有较好的稳定性;在TbTh3phen中,3-噻吩乙酸和邻菲啰罗啉能很好地将能量传递给Tb3+离子,Tb3+离子546nm绿色荧光发射峰最强.     

桂皮酸邻菲罗啉稀土配合物的合成及表征

合成了 13种桂皮酸和邻菲罗啉为配体的稀土配合物RE(phen)L3(L =C6H5CH =CHCOO- )。研究了配合物的红外光谱、摩尔电导、热重 差热曲线、X射线粉末衍射及荧光光谱。结果表明 ,稀土离子与配体间形成了化学键 ,配合物为晶体化合物 ,在 4 0 0和 540℃氧化分解 ;铕配合物Eu(phen)L3发出较强荧光 ,而其它配合物则发光较弱。     

铽配合物Tb(2-MBA)_3·2H_2O和Tb(2-MBA)_3 phen的荧光性能研究

以2-甲基苯甲酸(2-MBA)为第一配体、1,10-邻菲罗啉(phen)为第二配体,制备了三元铽配合物Tb(2-MBA)3phen和二元铽配合物Tb(2-MBA)3·2H2O,并利用元素分析、红外光谱、紫外光谱、荧光光谱和荧光寿命对二者的结构与性能进行分析表征。研究结果表明:三元铽配合物Tb(2-MBA)3phen的荧光发射强度要强于二元铽配合物Tb(2-MBA)3·2H2O,而二者的荧光寿命恰好相反,三元铽配合物Tb(2-MBA)3phen的荧光寿命短于二元铽配合物Tb(2-MBA)3·2H2O。热重分析表明Tb(2-MBA)3·2H2O的热分解温度要远高于Tb(2-MBA)3phen。     

1H-苯并三唑-1-乙酸稀土配合物的合成、表征及性质

溶液法合成了铕、铽与1H-苯并三唑-1-乙酸及1,10-邻菲啰啉的稀土配合物。通过元素分析、稀土配位滴定、摩尔电导、红外光谱、紫外光谱等手段对配合物进行了表征。结果表明,配合物的可能组成为Ln(L)3phen(Ln=Eu(III),Tb(III);HL=1H-苯并三唑-1-乙酸,Hbtaa;phen=1,10-邻菲啰啉)。利用荧光光谱、热分析和电化学方法讨论了配合物性质。荧光光谱表明配合物均有较好的发光性能。     

4-[(1,3-二氧代丁基)氨基]苯甲酸稀土配合物的合成、表征及发光性质

在乙醇体系中,由主配体4-[(1,3-二氧代丁基)氨基]苯甲酸(H2L,C11H11NO4)、稀土硝酸盐及辅助配体邻菲啰啉(phen)反应合成了两个系列8个配合物[Ln2(L)3(H2O)4]n(Ln=Sm(1),Eu(2),Tb(3),Dy(4));[Ln2(NO3)2(L)2(phen)2]n(Ln=Sm(5),Eu(6),Tb(7),Dy(8))。用元素分析、红外光谱、摩尔电导、热重分析进行表征,确定了产物的化学组成,推断了相应的结构。测定了室温时固体产物的激发和发射光谱,结果表明:由主辅配体共同配位的三元配合物的发光强度好于无辅助配体参与的二元配合物。测定了三元配合物的荧光寿命,其中铕和铽配合物显示较长的荧光寿命。     

肉桂酸-邻菲罗啉-稀土三元配合物对DNA作用的光谱研究

肉桂酸是植物内源信号分子水杨酸在植物体内生物合成的前体物质, 本文研究了肉桂酸(Hcin)、邻菲罗啉 (phen) 及稀土离子三元配合物[RE(phen)(cin)3(H2O)] (RE=Nd(Ⅲ), Ce(Ⅲ), Eu(Ⅲ))与EB-DNA体系的荧光淬灭光谱,共振荧光光谱, 电子光谱以及 DNA对EB光谱的影响等性质, 探讨了它们与DNA的作用方式. 结果表明, 稀土配合物与DNA存在静电与插入两种作用模式, 推测这些配合物可能具有较高的抗肿瘤活性或其它的生物活性.     

稀土-姜黄素-菲啰啉配合物荧光和抑菌活性研究

合成了稀土与姜黄素和1,10-菲啰啉的稀土三元配合物和稀土与姜黄素的稀土二元配合物, 通过元素分析、摩尔电导、热重-差热分析、 IR 、 UV-Vis 和1H NMR方法, 确定配合物的化学组成分别为: REL3L′及REL3 · 2H2O (RE=Sm, Eu, Dy, L=姜黄素, L′=1,10-菲啰啉). 同时研究了配合物在室温下的荧光性质, 结果显示稀土三元、 二元配合物都表现出配体(L)的特征发射且发射强度大于配体(L), 三元配合物的荧光强于二元配合物. 抗菌活性试验结果表明, 稀土三元、 二元配合物对枯草杆菌和大肠杆菌都表现出很好的抑制作用, 而且稀土三元配合物REL3L′对所选菌种的抑菌性明显强于稀土二元配合物REL3 · 2H2O和配体姜黄素.     

基于对羟基苯乙酸及邻菲咯啉的稀土配合物的合成、晶体结构和荧光光谱

在乙醇-水体系中合成了5个对羟基苯乙酸及邻菲咯啉稀土配合物:其中4个配合物[RE(HPAA)3(phen)2].2H2O(RE=Eu(1),Tb(2),Dy(3),Yb(4))具有相同的结构和类似的化学组成;第5个配合物是[Yb(HPAA)2(H2O)2(phen)2](HPAA).(HHPAA).2H2O(5),HHPAA=对羟基苯乙酸,C8H8O3;phen=1,10-邻菲咯啉),其结构和化学组成与前4个配合物不同。并通过元素分析、红外光谱、热重分析和粉末X-射线衍射对产物进行表征,用单晶X-射线衍射方法测定了配合物5的晶体结构。配合物5(C56H53N4O16Yb)属于三斜晶系,空间群P21/c,晶胞参数:a=2.206 52(3)nm,b=1.368 76(2)nm,c=1.754 14(2)nm,β=101.167(1)°,晶胞体积:V=5.19754(12)nm3,晶胞内结构基元数Z=4,分子量Mr=1211.06。测定了铕、铽和镝配合物的荧光光谱,结果表明,在形成配合物后,依然显示铕髥离子、铽髥离子和镝髥离子的特征发射,这表明配体将吸收的能量有效地转移给了中心离子,配体起到了很好的敏化作用。     

3-羟基-1-金刚烷甲酸轻稀土配合物的合成、晶体结构及与DNA作用

以3-羟基-1-金刚烷甲酸(Hhata=C11H16O3),邻菲啰啉(phen)和稀土硝酸盐为原料,合成了7个轻稀土配合物(1)～(7)[RE2(hata)6(phen)2].4H2O(RE=La(1),Ce(2),Pr(3),Nd(4),Sm(5),Eu(6),Gd(7))。其中(1)为单晶样,其余6个样为粉末样;用元素分析、红外光谱、摩尔电导、热重分析等手段表征了配合物;用单晶X射线衍射法测定了(1)的晶体结构,该配合物[La2(hata)6(phen)2].4H2O(C90H114La2N4O22)属于单斜晶系,空间群P2(1)/c,a=1.33979(13)nm,b=2.6395(2)nm,c=1.31321(14)nm,β=112.174(4)°,V=4.3005(7)nm3,Z=2,Mr=1881.67,F(000)=1944.0,Dc=1.453 g.cm-3,μ(Mo Kα)=1.056 mm-1。结果表明:两个镧原子与两个邻菲啰啉中的4个氮原子和6个3-羟基-1-金刚烷甲酸根中的羧基氧原子配位,中心原子的配位数为9。用溴化乙锭荧光探针法测试了7个配合物对EB-DNA复合体系的荧光猝灭效应,实验结果显示配合物均与DNA发生了不同程度的插入作用。     

3，4-二甲氧基苯乙酸邻菲咯啉轻稀土配合物的合成、晶体结构、荧光光谱及热行为

合成了3,4-二甲氧基苯乙酸邻菲咯啉轻稀土配合物：[RE₂(DMPA)₆(phen)₂](RE=Ce (1),Pr (2),Nd (3),Eu (4);HDMPA=3,4-二甲氧基苯乙酸,C₁₂H₁₂O₄;phen=1,10-邻菲咯啉),用元素分析、红外光谱、热重分析对产物进行表征,用单晶X-射线衍射方法测定了配合物3的晶体结构。配合物C₈₄H₈₂Nd₂N₄O₂₄ (3)属于三斜晶系,P1 空间群,晶胞参数：a=1.242 06(9) nm,b=1.244 56(9) nm,c=1.477 88(11) nm,α=90.617(4)°,β=103.486(4)°,γ=116.870(3)°,晶胞体积：V=1.963 8(2) nm³,晶胞内结构基元数Z=1,分子量M_r=1 820.02,电子数F(000)=926,密度D_c=1.539 g·cm^-3,吸收系数μ(Mo Kα)=1.389 mm^-1。测定了铕配合物的荧光光谱,荧光光谱表明,配合物显示了铕(Ⅲ)离子的特征发射,这表明配体将吸收的能量有效地转移给了中心离子,配体起到了很好的敏化作用。同时也测定了铕配合物的热分解情况,并利用TG-DTG曲线采用非等温积分法和微分法研究了热分解动力学机理。     

Thermally stable luminescent composites fabricated by confining rare earth complexes in the two-dimensional gallery of titania nanosheets and their photophysical properties

Fluorescent composite materials of exfoliated titania nanosheets, Ti(0.91)O(2), and rare earth (RE) complexes, Eu(phen)(2)Cl(3).2H(2)O and Tb(phen)(2)Cl(3).2H(2)O (phen = 1,10-phenanthroline), were synthesized via flocculation between them. X-ray diffraction measurements and transmission electron microscopy observations confirmed a restacked lamellar structure for the composites, and elemental analysis revealed a high RE complex content of 15 wt %. The decomposition temperature of the complexes trapped in the composites was improved to 420 degrees C from 250 degrees C for the free form. The restacked composite composed of Ti(0.91)O(2) nanosheets and Eu(phen)(2) exhibited characteristic red emission from the complex, while the composite with Tb(phen)(2) gave featureless emission originated from the ligand. This phenomenon can be explained by a shift of triplet state level of the ligand after encapsulation in the host titania nanosheets. The quantum yield of europium complex in the composite was enhanced 1.6 times more than that of the pure complex.     

X-ray structure characterization of palladium(II) ternary complexes of pyridinedicarboxylic and phthalic acid with phenanthroline and bipyridine

The crystal structures of the series of four ternary complexes, [Pd(phen)(2,6-PDCA)].4H(2)O (1) (phen=1,10-phenanthroline; 2,6-PDCA=2,6-pyridinedicarboxylic acid), [Pd(bpy)(2,3-PDCA)].3H(2)O (2) (bpy=2,2'-bipyridineand; 2,3-PDCA=2,3-pyridinedicarboxylic acid) and [Pd(phen)(PHT)].2.5H(2)O (3) (PHT=o-phthalic acid ) and [Pd(bpy)(PHT)].1.5H(2)O (4), are determined and the coordination modes of palladium(II) ternary complexes are characterized. All complexes take the mononuclear Pd(II) complexes, in which central Pd(II) atom of each complex has a similar distorted square-planar four coordination geometry. In all complexes, the aromatic heterocyclic compounds, phen and bpy, behave as a bidentate N, N' ligand. In the complex 1 and 2, 2,6-PDCA and 2,3-PDCA behave as a bidentate N, O ligand, and in complex 3 and 4, PHT behaves as a bidentate O, O' ligand.     

Synthesis, characterization, and luminescence properties of the ternary europium complex covalently bonded to mesoporous SBA-15

A novel mesoporous SBA-15 type of hybrid material (phen-SBA-15) covalently bonded with 1,10-phenanthroline (phen) ligand was synthesized by co-condensation of tetraethoxysilane (TEOS) and the chelate ligand 5-[N,N-bis-3-(triethoxysilyl)propyl]ureyl-1,10-phenanthroline (phen-Si) in the presence of Pluronic P123 surfactant as a template. The preservation of the chelate ligand structure during the hydrothermal synthesis and the surfactant extraction process was confirmed by Fourier transform infrared (FTIR) and (29)Si MAS NMR spectroscopies. SBA-15 consisting of the highly luminescent ternary complex Eu(TTA)(3)phen (TTA = 2-thenoyltrifluoroacetone) covalently bonded to a silica-based network, which was designated as Eu(TTA)(3)phen-SBA-15, was obtained by introducing the Eu(TTA)(3).2H(2)O complex into the hybrid materials via a ligand exchange reaction. XRD, TEM, and N(2) adsorption measurements were employed to characterize the mesostructure of Eu(TTA)(3)phen-SBA-15. For comparison, SBA-15 doped with Eu(TTA)(3).2H(2)O and Eu(TTA)(3)phen complexes and SBA-15 covalently bonded with a binary europium complex with phen ligand were also synthesized, and were named SBA-15/Eu(TTA)(3), SBA-15/Eu(TTA)(3)phen, and Eu-phen-SBA-15, respectively. The detailed luminescence studies on all the materials showed that, compared with the doping sample SBA-15/Eu(TTA)(3)phen and binary europium complex functionalized sample Eu-phen-SBA-15, the Eu(TTA)(3)phen-SBA-15 mesoporous hybrid material exhibited higher luminescence intensity and emission quantum efficiency. Thermogravimetric analysis on Eu(TTA)(3)phen-SBA-15 demonstrated that the thermal stability of the lanthanide complex was evidently improved as it was covalently bonded to the mesoporous SBA-15 matrix.     

由醚氧桥连四羧酸配体构筑的锰(Ⅱ)和锌(Ⅱ)配位聚合物的合成、晶体结构、荧光及磁性质（英文）

采用水热方法,用醚氧桥连四羧酸配体(H4L)和菲咯啉(phen)、吡啶(py)分别与MnCl2·4H2O和ZnCl2反应,合成了2个二维配位聚合物{[Mn2(μ6-L)(phen)2]·5H2O}n(1)和{[Zn2(μ7-L)(py)]·H2O}n(2),并对其结构、荧光和磁性质进行了研究。结构分析结果表明2个配合物分别属于三斜和单斜晶系,P1和I2/a空间群。配合物1和2分别具有基于四核锰和双核锌的二维层结构。荧光和磁性研究结果表明,配合物2在室温下能发出蓝色荧光,聚合物1中相邻Mn?髤离子间存在反铁磁相互作用。     

稀土配合物的研究 IV: 稀土元素与4-酰代双吡唑啉酮BPMPPD及1,10-二氮杂菲三元配合物的合成和性质的研究

4-酰代双吡唑啉酮是一类新型β双酮多啮金属离子螯合剂和萃取剂, 其性能优于单吡唑啉酮, 本文继合成1,5-双(1'-萃基-3'-甲基-5'-氧代吡唑-4')-1,5-戊二酮(BPMPPD, H2A)后, 又合成了它和1,10-二氮杂菲(Phen, P)与稀土元素形成的三元固态配合物, 并对这些新配合物的性质进行了研究。     

1，2-环己二羧酸及芳香含氮配体的双核镉、锰配合物的合成和晶体结构

用水热法合成了两种新的配合物[Cd2(e,e-trans-chdc)2(bipy)2(H2O)2].H2O(1)和[Mn2(e,a-cis-chdc)2(phen)2(H2O)2].2H2O(2)(chdc=1,2-环己二羧酸,bipy=2,2′-联吡啶和phen=1,10-邻菲咯啉),用X-射线单晶衍射分析确定了配合物的晶体结构。配合物1和2均为双核分子。配合物1中,2个镉髤离子由2个1,2-环己二羧酸根以e,e-trans配位方式桥联,每个镉髤离子与1个2,2′-联吡啶的2个氮原子、2个1,2-环己二羧酸根的4个氧原子及1个水分子中的氧原子配位,形成了单帽变形三棱柱构型。配合物2中,2个锰髤离子由2个1,2-环己二羧酸根以e,a-cis配位方式桥联,每个锰髤离子与1个1,10-邻菲咯啉的2个氮原子、2个1,2-环己二羧酸根的3个氧原子及1个水分子中的氧原子配位,形成了畸变的八面体构型。配合物1和2分子之间都存在π-π堆积和O-H…O、C-H…O弱作用,进而将双核分子连接成三维超分子网络结构。配合物的荧光均来自于配体的荧光。     

Synthesis, crystal structure, and luminescent properties of 2-(2,2,2-trifluoroethyl)-1-indone lanthanide complexes

A new β-diketone, 2-(2,2,2-trifluoroethyl)-1-indone (TFI), which contains a trifluorinated alkyl group and a rigid indone group, has been designed and employed for the synthesis of two series of new TFI lanthanide complexes with a general formula [Ln(TFI)(3)L] [Ln = Eu, L = (H(2)O)(2) (1), bpy (2), and phen (3); Ln = Sm, L = (H(2)O)(2) (4), bpy (5), and phen (6); bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline]. X-ray crystallographic analysis reveals that complexes 1-6 are mononuclear, with the central Ln(3+) ion eight-coordinated by six oxygen atoms furnished by three TFI ligands and two O/N atoms from ancillary ligand(s). The room-temperature photoluminescence (PL) spectra of complexes 1-6 show strong characteristic emissions of the corresponding Eu(3+) and Sm(3+) ions, and the substitution of the solvent molecules by bidentate nitrogen ligands essentially enhances the luminescence quantum yields and lifetimes of the complexes.