稀土与苯并咪唑甲基酮缩二乙三胺Schiff碱配合物的合成、表征及生物活性

以邻苯二胺、乳酸、二乙三胺为原料合成双苯并咪唑甲基酮缩二乙三胺Schiff碱化合物,在无水乙醇溶剂中,所得的化合物与稀土离子(Ce3 、Nd3 、Sm3 )配合,合成了三种新型稀土配合物,并对其进行了元素分析、红外光谱测试、差热热重及生物活性研究。钕与苯并咪唑甲基酮缩二乙三胺Schiff碱的配合物对大肠杆菌和霉菌均有较好的杀菌活性;钐与苯并咪唑甲基酮缩二乙三胺Schiff碱的配合物对大肠杆菌有较好的杀菌活性,而对霉菌无活性;铈的配合物对所考察的菌种均无抑制作用。     

Schiff碱单核与双核配合物的抗菌及催化活性研究

合成了双核[Cu(HL)(CH3OH)](1)和单核[Cu(HI)2](2)(H2L=水杨醛缩乙醇胺)2个Schiff碱铜配合物.采用元素分析和x射线单晶衍射对配合物的组成和结构进行了表征.采用琼脂扩散法测定了配体和配合物的抑菌活性,同时研究了不同条件下配合物对H2O2分解的催化性能.实验表明:目标化合物对革兰氏阳性菌具有较好的抑制作用,并且配合物1的抑菌活性优于配体和配合物2;在碱性条件下,0.008 g配合物1作为催化剂,对15 mL15%过氧化氢溶液的催化分解效果最佳,同时配合物1的催化活性明显高于配合物2和相应金属盐的催化活性.     

稀土壳聚糖配合物的制备、表征和抑菌性能研究

以天然高分子壳聚糖和稀土硝酸盐为原料,室温下,壳聚糖与稀土硝酸盐溶液在稀醋酸中反应,制得一系列新型稀土壳聚糖配合物.通过红外光谱、X射线能谱、差热-热重、X射线光电子能谱、透射电镜等对合成物进行分析、表征.所合成的配合物由分散的纳米粒子组成.并采用培养基扩散法、营养肉汤稀释法等抑菌实验方法对其进行了抑菌活性研究,结果表明其对大肠杆菌和金黄色葡萄球菌均有很好的抑菌作用,最小抑菌浓度(MIC)在200μg·mL~(-1)～300μg·mL~(-1)范围内,低于800μg·mL~(-1),且抑菌效果明显优于单独的壳聚糖、稀土硝酸盐.     

甲基丙烯酸-8-羟基喹啉稀土配合物的合成、表征及抑菌活性

以甲基丙烯酸和8-羟基喹啉为配体,合成了甲基丙烯酸-8-羟基喹啉稀土(钕、镧、铕)配合物,采用元素分析、摩尔电导、红外光谱(IR)、紫外光谱(UV)、荧光光谱和热重-差热分析(TG-DTA)手段对配合物的组成和性质进行了表征。此外,采用体外抑菌圈法研究了合成的3种稀土配合物对大肠杆菌和金黄色葡萄球菌的抑菌活性。实验数据确定配合物的组成为Eu L·L2'和REL2·L'(RE=La,Nd,L=甲基丙烯酸L'=8-羟基喹啉),在二甲亚砜溶液中配合物属非电解质,差热-热重分析结果表明合成的配合物热稳定性较配体增强,且Nd(III),Eu(III)配合物具有较强的Nd3+,Eu3+特征线状荧光。通过体外抑菌实验,发现3种稀土配合物作用大肠杆菌和金黄色葡萄球菌后均具有10~12 mm的抑菌圈,说明所合成的配合物对大肠杆菌和金黄色葡萄球菌的生长具有中等的抑制作用,且对大肠杆菌的抑制作用强于金黄色葡萄球菌。稀土配合物的抑菌作用明显强于单独配体,表明形成配合物后,稀土离子与甲基丙烯酸、8-羟基喹啉的协同作用,显著增强了抗菌效果。     

Schiff碱及其配合物的合成研究进展

Schiff碱及其配合物具有特殊的结构和性质,在生物化学、催化化学、分析化学、材料化学等方面都有广泛应用。总结了各类Schiff碱及其特点及研究现状,指出了Schiff碱进一步研发的方向。     

稀土-烟酸-8-羟基喹啉三元配合物合成、表征及其抑菌活性

在有机溶剂中合成了４种未见报道的稀土、８－羟基喹啉和烟酸三元固体配合物,并运用元素分析、摩尔电导、红外光谱、紫外和荧光光谱、等手段进行表征。将合成的固体三元配合物进行了抑菌试验,并与稀土离子、配位等对比,其结果表明配合物对真菌有一定的抑制作用。     

Nd(Ⅲ),Ce(Ⅲ)与5′-IMP配合物的合成及抗菌作用研究

以稀土硝酸盐、5′-次黄嘌呤核苷酸二钠盐(5′-IMP)为原料,制备了两种稀土配合物Nd(Ⅲ)-IMP与Ce(Ⅲ)-IMP。通过元素分析及ED-TA滴定确定了配合物的组成,并通过摩尔电导、IR、UV、TG-DSC的测定对配合物进行了表征。结果表明5′-次黄嘌呤核苷酸以嘌呤碱基上的N(7)原子分别与Nd(Ⅲ),Ce(Ⅲ)配位,其中磷酸根未参与配位,但可能形成氢键。将合成的固体配合物进行了抑菌试验,并与配体5′-IMP进行比较,结果表明两种配合物对金黄色葡萄球菌和肺炎球菌均有强抑制作用,而配体5′-IMP无抑菌作用。     

水杨酸类稀土配合物抑菌作用研究

利用抑菌圈法,测定了5-氨基水杨酸及7种水杨酸类稀土配合物对大肠杆菌、枯草芽孢杆菌、金黄色葡萄球菌生长的抑制作用。结果表明,配体和配合物对3种细菌均表现抑菌作用,不同药物的抑菌作用具有选择性,不同的药物对同一种细菌的抑菌作用差异较大;总体上水杨酸类稀土配合物的抑菌效果明显高于5-氨基水杨酸,抑菌活性均随浓度增大而增强;8种药物对枯草芽孢杆菌的生长抑制最好,对大肠杆菌和金黄色葡萄球菌的生长抑制较弱。     

Nd(Ⅲ),Ce(Ⅲ)与5'-IMP配合物的合成及抗菌作用研究

以稀土硝酸盐、5'-次黄嘌呤核苷酸二钠盐(5'-IMP)为原料,制备了两种稀土配合物Nd(Ⅲ)·-IMP与Ce(Ⅲ)-IMP.通过元素分析及EDTA滴定确定了配合物的组成,并通过摩尔电导、IR、UV、TG-DSC的测定对配合物进行了表征.结果表明5'-次黄嘌呤核苷酸以嘌呤碱基上的N(7)原子分别与Nd(Ⅲ),Ce(Ⅲ)配位,其中磷酸根未参与配位,但可能形成氢键.将合成的固体配合物进行了抑菌试验,并与配体5'-IMP进行比较,结果表明两种配合物对金黄色葡萄球菌和肺炎球菌均有强抑制作用,而配体5'-IMP无抑菌作用.     

水杨醛氨基酸Schiff碱与硫酸钕配合物的研究

本文合成了未见文献报道的水杨醛缩 DL—亮氨酸 Schiff碱钕配合物和水杨醛缩 L—异亮氨酸 Schiff碱的钕配合物。通过元素分析、摩尔电导、红外光谱、紫外光谱、荧光光谱、差热—热重分析等手段对配合物的组成和性质进行了确定和表征 ,两种配合物的组成可能为 Nd2 (Sal- L ue) 2 (SO4) 2 、Nd3 (Sal- IL ue) 2 (SO4) 2 · 2 H2 O。     

Synthesis,characterization, biological activities and luminescent properties of lanthanide complexes with [2-thiophenecarboxylic acid, 2-(2-pyridinylmethylene)hydrazide] Schiff bases ligand

A Schiff base L [2-thiophenecarboxylic acid, 2-(2-pyridinylmethylene)hydrazide] with its lanthanide metal complexes was synthesized. These complexes were characterized by elemental analysis, molar conductivity measurements, spectral analysis(NMR, FT-IR, and UV-Vis), luminescence and thermal gravimetric analysis. The Schiff base ligand was a tridentate chelate and coordinates to the central lanthanide ion with 1:2 metal:ligand ratio. The conductivity data showed a 1:1 electrolytic nature with a general formula [LnL_2(NO_3)_2]NO_3. The luminescence emission properties for Sm, Tb, and Eu complexes were observed and showed that the ligand L could absorb and transfer energy to Sm(III), Tb(III) and Eu(III) ions. The complexes possessed a good antibacterial activity against different bacterial strains. In addition, the scavenging activity of the Ln(III) complexes on DPPH was concentration dependant and the complexes were significantly more efficient in quenching DPPH than the free Schiff base ligand.     

Synthesis, Characterization and Activity of Rare Earth Complexes with Schiff Base From 2,6-Diformylpyridine N-Oxide and 4-Amino-antipyrine

Six new rare earth complexes with Schiff base from 2,6-diformylpyridine N-oxide and 4-amino-antipyrine were synthesized. These complexes with general formula REL(NO3)3(RE = La, Pr, Eu, Tb, Er, Y) were characterized by elemental analysis, IR, UV, molar conductance measurements and antimicrobial activity.     

POLYMERIZATION OF LACTIC O-CARBOXYLIC ANHYDRIDE USING ORGANOMETALLIC CATALYSTS

The ring-opening polymerization of 5-methyl-1,3-dioxolane-2,4-dione (lactic O-carboxylic anhydride, LacOCA)using organometallic complexes, including Co(Ⅲ) complexes with Schiff base ligands, Tin(Ⅱ) alphatates and Al(Ⅲ)complexes with Schiff base ligands, was explored. The polymerization was carried out by treatment of the organometallic complexes with LacOCA in toluene under mild conditions. The corresponding poly(lactic acid) was characterized by spectroscopy and thermal analyses, which revealed insight into the structure of the effective catalyst for the polymerizationof LacOCA.     

Lanthanide amino acid Schiff base complexes： synthesis, spectroscopic characterization, physical properties and in vitro antimicrobial studies

Complexes of La(Ⅲ),Nd(Ⅲ),Gd(Ⅲ),Sm(Ⅲ),and Ce(Ⅳ) were synthesized with Schiff base [(3,5-di-tert-butyl-2-hydroxybenzyl) amino] acetic acid(H 3 L).The ligand and its complexes were synthesized and characterized based on the following analysis:elemental analyses,FAB-mass,molar conductance measurements,magnetic measurement,UV-visible,IR,and NMR spectral studies.The spectral data revealed that the ligand acted as a neutral tridentate coordinating to metal ion through ONO donor sequence.Thermal degradation studies of the ligand and its complexes showed that the previous lanthanide complexes were more thermally stable than the ligand itself.The Schiff base and its complexes were screened for their antibacterial(Escherichia coli,Staphylococcus aureus) and antifungal(Aspergillus flavus and Candida Albicans).     

稀土硝酸盐与希夫碱邻香兰素缩丙氨酸盐及邻菲咯啉三元配合物的合成与表征

合成了稀土硝酸盐与希夫碱邻香兰素缩丙氨酸盐(以KHL表示)及邻菲咯啉的三种固体三元配合物。通过元素分析、差热-热重、红外光谱、紫外光谱及摩尔电导分析等手段,确定配合物的组成为［RE(L)(Phen)(H2O)］NO3,(RE=Y,Nd,Sm)。并对它们的配位方式及某些性质进行了研究。     

Synthesis, characterization, and anticancer properties of rare earth complexes with Schiff base and o-phenanthroline

Five novel ternary complexes of the rare earth ions with o-phenanthroline（Phen） and Schiff base salicylaldehyde L-phenyla- lanine（KHL） were synthesized in ethanol. Their compositions were characterized by elemental analysis, molar conductance, ^1H NMR, FT-IR, and Raman spectra. The formulas of the complexes were verified to be RE（L）（Phen）Cl（H2O） （RE=La^3＋, Ce^3＋, Nd^3＋, Er^3＋, and Gd^3＋; L=Schiff base salicylaldehyde L-phenylalanine; phen=o-phenanthroline）. Methyl thiazolyl tetrazolium （MTT） colorimetry and flow cytometry were used to test the anticancer effect of the complexes with K562 tumor cell. The research showed that the complexes could inhibit K562 tumor cell＇s growth, generation, and induce apoptosis. The inhibition ratio was accelerated by increasing the dosage, and it had significant positive correlation with the medication dosage.     

Synthesis, Catalysis of Rare Earth Complexes with Aliphatic Noncyclic Polyether-Amino Acid Schiff Base

Coordination chemistry of rare earth with Schiffbase has developed rapidly in the last fewyears ,butthe majority of the complexes studied are derivedfromaromatic Schiff base .So far less papers of rare earthcomplex with aliphatic Schiff base have been rep…     

Synthesis and Characterization of Lanthanum Complexes with Amino Acid Schiff Base

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Synthesis and Application of Lanthanide Complexes with Schiff Base of Pridoxylidence-Glycine

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