配合物Eu(Sal)2(phen)2(NO3)的合成及荧光性能的研究

用硝酸铕、水杨酸与邻菲罗啉为原料合成了配合物Eu(Sal)2(phen)2(NO3),考察了配体用量和溶剂用量等因素对反应的影响.通过元素分析、红外光谱和紫外光谱确定了配合物的组成及结构,并通过荧光光谱对其荧光性质进行了研究.     

配合物Eu(Sal)_2(phen)_2(NO_3)的合成及荧光性能的研究

用硝酸铕、水杨酸与邻菲罗啉为原料合成了配合物Eu(Sal)2(phen)2(NO3),考察了配体用量和溶剂用量等因素对反应的影响。通过元素分析、红外光谱和紫外光谱确定了配合物的组成及结构,并通过荧光光谱对其荧光性质进行了研究。     

Mn(phen)2Cl2配合物的合成与表征

基于锰金属酶模型配合物在揭示生命科学中的理论和应用意义,设计锰酶配合物的制备方法,合成了Mn(phen)2C l2配合物,并结合文献资料推测了其可能的形成机理及一些实验控制因素。     

苯丙烯酸邻菲罗啉铕钇配合物的合成及荧光特性

在乙醇介质中，合成了标题化合物，测定了其组成，红外光谱及荧光光谱，结果表明，羧酸的羟基氧及邻菲罗啉中的氮原子均与稀土离子配位，铕钇配合物的荧光强度值高于铕配合物。     

配合物[Cd(na)2(phen)2]·[Cd(na)2(phen)2]·3H2O的合成、晶体结构及荧光性质

用硝酸镉与1-萘甲酸、邻菲罗啉水热合成了配合物[Cd(na)2(phen)2]·[Cd(na)2(phen)2]·3H2O (Hna=1-萘甲酸,phen=1,10-邻菲罗啉),并用X-射线单晶衍射、红外、热重和元素分析进行了结构表征.结果表明,该配合物属三斜晶系,P-1空间群,晶胞参数为:a=1.27123(16) nm,b=1.6369(4) nm,c=1.9656(2)nm,α=75.613(2)°,β=84.363(2)°,γ=71.5380(10)°,Z=2,V=3.7572(8) nm3.配合物包含两个离散的单核[Cd(na)2(phen)2]子单元和三个结晶水分子,并通过分子间氢键形成三维超分子结构.在335 nm的紫外光激发下,配合物发射出源于Na-之间电子跃迁的荧光.     

配合物La（C6H5CHOHC00）3（phen）（H2O）的合成

用苯羟基乙酸、邻菲罗啉与稀土的硝酸盐为原料合成了配合物La(C_6H_5CHOHCOO)_3(phen)(H_2O),通过元素分析、红外光谱、核磁共振等测试手段,确定了配合物的组成和结构,并通过热重分析对其热性质进行了表征。结果表明,配合物中邻菲罗啉以双齿螯合方式配位,而苯羟乙酸则以桥联或单齿方式参与配位。     

醋酸稀土与含氮配体配合物合成,表征及抗菌性能

本文报导了稀土醋酸酸盐与１，１０－邻菲罗啉及２，２′－联吡啶在甲醇中合成出三元固态配合物的方法，通过元素分析，红外光谱及热重分析对该系列配合物进行了表征。该配合物的抗菌试验表明其具有较强的广谱抗菌作用。     

稀土、苯氧乙酸、1,10-邻菲罗啉配合物的合成及抑菌

在乙醇水溶液中合成了六种苯氧乙酸(HPOA)-邻菲罗啉(Phen)-稀土三元固体配合物,采用元素分析,红外光谱,差热热重等测试方法进行表征,确定配合物的化学组成为RE(POA)3Phen(RE=La3+,Pr3+,Nd3+,Sm3+,Gd3+,Dy3+)。研究了稀土配合物的抑菌活性,结果表明稀土三元配合物的抑菌效果较单独的稀土氯化物、邻菲罗啉和苯氧乙酸好。     

Eu(MAA)_3Phen-CHIT用于铅离子的测定

在316 nm激发波长下,痕量铅离子的引入可使铕-甲基丙烯酸(MAA)-邻菲罗啉(Phen)三元稀土配合物壳聚糖(CHIT)醋酸(HAc)溶液体系在418 nm的发射荧光产生猝灭现象。在0.5 g/LEu(MAA)3Phen-0.2%CHIT-1%HAc溶液中,随着Pb2+浓度的增大,该体系的荧光强度IF由急剧下降至渐趋稳定。Pb2+浓度在0.1~6μmol/L内,IF呈线性下降,检出限为1.1μg/L。     

D-氨基葡萄糖与硝酸铕、铽配合物的合成及光谱分析

用D-氨基葡萄糖盐酸盐分别与硝酸铕和硝酸铽反应,制备了氨基葡萄糖-铕、氨基葡萄糖-铽两种配合物,并研究了配合物的红外光谱、紫外光谱和X射线光电子能谱(XPS)。配合物紫外的λmax发生了明显紫移,在远IR区Glu-Eu配合物中出现的新的吸收峰206 cm-1和254 cm-1可分别归属于νEu-O和νEu-N,在Glu-Tb配合物中出现的新的吸收峰203 cm-1和252 cm-1可分别归属于νTb-O和νTb-N,XPS表明氨基葡萄糖-Ln中氨基葡萄糖的N和O原子上的电子云密度减少,孤对电子转移,稀土离子得到电子。     

稀土配合物[Ln2(sba)3(phen)2(H2O)2](Ln=Eu,Tb)合成、表征和性质研究

在乙醇和水的混合溶剂中,利用辛二酸[Suberic acid=H2sba]、邻菲罗啉(Phen)合成了标题化合物,通过化学分析、元素分析、红外光谱、热分解等方法对配合物组成进行了分析和表征,并研究了两种配合物的荧光性质。     

Eu(DBM)3phen/APTES-MCM-41的光学性能研究

本文以十六烷基三甲基溴化铵(CTAB)为模板剂、正硅酸乙酯(TEOS)为无机硅源以及1,3,5-三甲苯(TMB)为加长剂合成了有序介孔分子筛(MCM-41)。选择Eu(DBM)3phen为客体,纳米级介孔分子筛为主体,在氯仿中进行分子组装,制备具有强发光性能的超分子纳米复合材料Eu(DBM)3phen/APTES-MCM-41。采用XRD、HRTEM和荧光光谱分析等对产物的结构与性能进行了分析。结果表明,Eu(DBM)3phen组装进APTES-MCM-41孔道之后,发光纯度提高。其原因为APTES-MCM-41表面的-NH2基团强烈影响了Eu3 离子周围的配位场。由于配位场的微扰作用,Eu(DBM)3phen配合物的对称性强烈下降,导致发光纯度提高。结果同时表明,Eu(DBM)3phen/APTES-MCM-41随着Eu3 离子组装量的增加而发光强度提高。     

Distinct composite structure and properties of Eu(phen)2Cl3(H2O)2 in poly(methyl methacrylate) and polyvinylpyrrolidone

The luminescent europium complex Eu(phen)₂ Cl₃(H₂O)₂ (phen refers to 1,10‐phenanthroline) was doped in poly(methyl methacrylate) (PMMA) and polyvinylpyrrolidone (PVP), respectively. The formed composite systems with different molar ratios of C?O groups in polymers and Eu ions were characterized by X‐ray diffractometry (XRD), FTIR, and photoluminescent (PL) spectroscopy and lifetime measurement. The XRD diffractograms show that the composites of PMMA/Eu(phen)₂Cl₃(H₂O)₂ and PVP/Eu (phen)₂Cl₃(H₂O)₂ have crystalline and amorphous structures, respectively, arising from different interactions between the polymers and the complex, as revealed by FTIR spectra. This leads to distinct luminescent characteristics arising from the ⁵D₀→⁷F_J transitions of Eu(III) ion (J = 0–4). For the composite systems of PMMA/complex, the characteristics of the emission lines change with decreasing molar ratios of C?O/Eu and approach that of the pure complex; whereas the composite systems of PVP/complex have similar spectral features, regardless of the molar ratios, differing from that of the pure complex. The polymer matrices have a substantial influence on the structure and properties of the composites. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 3524–3530, 2004     

Synthesis and crystal structure of mer-nitroaquatriamminenitrosylruthenium(II) nitrate [RuNO(NH3)3(NO2)(H2O)](NO3)2

The reaction between mer-[RuNO(NH₃)₃(NO₂)(OH)]Cl·0.5H₂O and an excess of 16 M HNO₃ leads to the protonation of the starting complex and crystallization of the complex with a coordinated water molecule and nitrite anion. The crystal structure of the product has been determined. The coordinated water molecule tends to be a weak acid with a measured pK_a of 2.4.     

PLFX-Co(phen)_3~(2+)复合物与CT-DNA的结合性质及切割活性

利用荧光光谱及流体动力学等方法,研究了普利沙星(PLFX)-Co(phen)32+与CT-DNA间的作用机理。荧光光谱测量结果表明:普利沙星和Co(phen)32+发生了结合作用形成了复合物,配比为2∶1;向PLFX-Co(phen)32+体系中,加入CT-DNA后,复合物进一步与DNA相结合,结合常数为2.18×105L/mol。通过粘度法、熔点测定及凝胶电泳实验研究了复合物与CT-DNA的相互作用。结果表明体系与CT-DNA间主要是沟槽作用;PLFX-Co(phen)32+能够有效切割质粒DNA。     

Synthesis,Structure and Fluorescence Spectra Study of a Supramolecular Zinc(II) Complex

A new structural supramolecular zinc(II) complex (1), [Zn(H₂O)₆]²⁺[Zn(4,4′-bipy)(SO₄)₂(H₂O)₂]^2?[Zn(4,4′-bipy)(SO₄)(H₂O)₃] is synthesized in mixed solvent system at room temperature. The complex was characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction. Structural analyses reveal that the complex is crystallized in the triclinic system with P1 space group. Cell parameters: a = 7.3145 (15) Å, b = 11.194 (2) Å, c = 11.442 (2) Å, α = 72.48 (3)°, β = 73.78 (3)°, γ = 83.39 (3)°, V = 857.3 (3) ų. Zn atoms (Zn1, Zn2 and Zn3) are all six-coordinated, however, the coordination environments of them are different. Owning to the abundant intro- and inter- hydrogen bonding interactions, the adjacent molecular units were connected to form a 2D supramolecular chain, and the two adjacent chains were furthermore linked to form a 3D supermolecular network structure via the hydrogen bonds. In addition, it is found that the complex has potential applications as fluorescent-emitting materials due to the strong fluorescence.     

Synthesis and photoluminescence properties of Eu2+/Eu3+ or Ce3+/Eu3+ co-doped Sr5(BO3)3F compounds

The synthesis and photo-luminescence properties of Eu²⁺/Eu³⁺ or Ce³⁺/Eu³⁺ co-doped Sr₅(BO₃)₃F compounds are reported. Using the Sr₅(BO₃)₃F as the host, through the solid state reaction under the reductive atmosphere, Eu²⁺/Eu³⁺ and Ce³⁺/Eu³⁺co-doped samples were prepared. These compounds exhibit good photo-luminescence properties. Under the excitation of 376 nm, an unusual red orange emission coming from the Eu²⁺ ions can be obtained in Eu ions doped Sr₅(BO₃)₃F, which exhibits a broadband emission in the range of 450–800 nm with the peak at around 600 nm. At the same time, the characteristic f-f excitation and emission of Eu³⁺ can improve and adjust the Eu²⁺ emission in Eu³⁺/Eu²⁺ codoped Sr₅(BO₃)₃F. In addition, the adjustable luminescence properties from blue to white of Sr₅(BO₃)₃F:Ce³⁺, Eu³⁺ are investigated. The energy transfer behavior from Ce³⁺ to Eu³⁺ was confirmed. In the spectra of the co-doped samples, we can hardly observe the characteristic peak of Eu²⁺, because Ce⁴⁺ can oxidize Eu²⁺ to Eu³⁺, and Ce⁴⁺ itself is reduced to Ce³⁺. The CIE coordinates from (0.2758, 0.2420) to (0.3857, 0.3015) show Sr₅(BO₃)₃F:3%Ce³⁺, x%Eu³⁺ (x = 1,3,5,7,9) are in the white light emission region. All results demonstrate that the Sr₅(BO₃)₃F:Eu³⁺/Eu²⁺ and Sr₅(BO₃)₃F:Ce³⁺/Eu³⁺ phosphors have good application prospects for LED plant growth and white LED, respectively. The bond energy method was used to explain the reason why the Eu²⁺/Eu³⁺ ion instead of only Eu²⁺ and Ce³⁺/Eu³⁺ instead of Ce³⁺/Eu³⁺/Eu²⁺ can exist in the host Sr₅(BO₃)₃F. The theoretical analysis agree well with the experimental result.