Synthesis and Characterization of Rare Earth Complexes of Ferrocenylcarbonylhydrazine

Ｔｈｅｍｅｔａｌｃｏｍｐｌｅｘｅｓｏｆｈｙｄｒａｚｉｄｅｓｈａｖｅａｔｔｒａｃｔｅｄｃｏｎｓｉｄｅｒａｂｌｅｉｎｔｅｒｅｓｔｏｗｉｎｇｔｏｔｈｅｉｒａｎｔｉｆｕｎｇａｌａｎｄａｎｔｉｂａｃｔｅｒｉａｌａｃｔｉｖｉｔｉｅｓ[1 ,2 ] .Ｔｈｅｙｃａｎａｌｓｏｂｅｕｓｅｄａｓａｎａｌｙｔｉｃａｌｒｅａｇｅｎｔｓ[3 ]ａｎｄｅｘｔｒａｃｔｉｎｇａｇｅｎｔｓｆｏｒｍｅｔａｌｓａｌｔｓ[4 ] .Ｍａｎｙｃｏｍｐｌｅｘｅｓｏｆｈｙｄｒａｚｉｄｅｓｈａｖｅｂｅｅｎｓｙｎｔｈｅｓｉｚｅｄａｎｄｃｈａｒａｃｔｅｒｉｚｅｄ[5]…     

Synthesis and photoluminescent properties of doped ternary Eu_(1-x)Ln_x(NPPD)_3·DPQ complexes

Rare earth (RE) ternary complexes of Eu0.5Ln0.5(NPPD)3·(DPQ) (HNPPD=1-(naphthalen-2-yl)-3-phenylpropane-1,3-dione; DPQ= dipyridobenzoquinone) and Eu1-xLax(NPPD)3·(DPQ) (Ln3+=La3+, Gd3+, Sm3+, Pr3+; x=0.0, 0.1, 0.3, 0.5, 0.7, 0.9) were synthesized by the reaction of RECl3·6H2O with HNPPD and DPQ in stoichiometry. The complexes were characterized with IR, elemental analysis, TGA-DSC and wide-angle X-ray diffraction. The UV-Vis absorption spectra and fluorescence properties of the complexes were also investigated. The experimental results showed that the luminescence efficiency of Eu3+ complexes was enhanced by doping some other lanthanide ions. Eu0.7La0.3(NPPD)3·(DPQ) showed the highest luminescence efficiency.     

Syntheses, Characterization and Antitumour Activities of Rare Earth Metal Complexes with 2- （ （ （4,6-dimethyl）-2-Pyrimidinyl ）thio ）-Acetic Acid

Pyrimidineringsystemswhichcontainmercapto grouphaveverycloserelationshiptosulphuranalogues oftheDNAbases.Mostofthosecompoundswerere portedtobetumorinhibitors,antimycotic,antileuke mic,tuberculoatat,antithyroid,andhypoglycaemic agentsandhaveattractedinterestofmany chemists[1～6].Nigametal[6]synthesizedcorresponding4,6dimethyl5(arylazo N substitutedp sulphamyl benzeneazo)pyrimidin2thiolsbycondensationof4,6dimethylpyrimidinyl2thiolwithdifferentdiazotised bases,invitroalltheobtainedthiolcompounds…     

Preparation of Anhydrous LnCl3(Ln=Eu, Er, Lu) by Chemical Vapor Transport

Ｔｈｅｐｒｅｐａｒａｔｉｏｎｏｆａｎｈｙｄｒｏｕｓｒａｒｅｅａｒｔｈｈａｌｉｄｅｓｃａｎｂｅｔｒａｃｅｄｂａｃｋｔｏｔｈｅｂｅｇｉｎｎｉｎｇｏｆｔｈｅ20ｔｈｃｅｎｔｕｒｙ[1].Ｔｈｅｐｒｅｐａｒａｔｉｏｎｍｅｔｈｏｄｓｍａｙｂｅｃｌａｓｓｉｆｉｅｄａｓｔｈｒｅｅｔｙｐｅｓ,ｈａｌｏｇｅｎａｔｉｏｎｏｆｍｅｔａｌｓ,ｈａｌｏｇｅｎａｔｉｏｎｏｆｒａｒｅｅａｒｔｈｏｘｉｄｅｓ,ａｎｄｄｅｈｙｄｒａｔｉｏｎｏｆｒａｒｅｅａｒｔｈｈａｌｉｄｅｈｙｄｒａｔｅｓ[2].Ｔｈｅｒｅａｃｔｉｏｎｓｂｅｔｗｅｅｎｒａｒｅ…     

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 Application of Lanthanide Complexes with Schiff Base of Pridoxylidence-Glycine

Ｔｈｅｈａｒｍｆｕｌｎｅｓｓｏｆｈｅａｖｙｍｅｔａｌｅｌｅｍｅｎｔｓｏｎｐｌａｎｔｓｉｓｏｎｅｏｆｔｈｅｓｅｒｉｏｕｓｅｎｖｉｒｏｎｍｅｎｔａｌｐｒｏｂｌｅｍｓｏｆｔｈｅｍｏｄｅｒｎｗｏｒｌｄ .Ｉｎｒｅｃｅｎｔｙｅａｒｓ ,ｔｈｅｓｔｕｄｙｏｎｔｈｅｍｉｓａｌｓｏｏｎｅｏｆｖｅｒｙａｃ ｔｉｖｅｒｅｓｅａｒｃｈｐｒｏｊｅｃｔｓｉｎｐｌａｎｔｐｏｌｌｕｔｉｏｎｅｃｏｌｏｇｙｆｉｅｌｄｓ[1～ 6 ] .ＬａｎｔｈａｎｉｄｅｃｏｍｐｌｅｘｅｓｗｉｔｈｔｈｅＳｃｈｉｆｆｂａｓｅａｒｅａｃｌａｓｓｏｆｃｏｍｐｏｕ…     

Syntheses, Characterizations and Catalytic Activities of Rare Earth Derivatives of Molybdotungstovanado-Phosphoric Heteropoly Acid

Ｔｈｅｓｙｎｔｈｅｓｅｓａｎｄｃｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆｎｅｗ ｔｙｐｅｈｅｔｅｒｏｐｏｌｙｃｏｍｐｌｅｘｅｓｃｏｎｔａｉｎｉｎｇｒａｒｅｅａｒｔｈｅｌｅｍｅｎｔｓｈａｖｅｂｅｅｎｒｅｐｏｒｔｅｄｉｎｔｈｅｐａｓｔ.Ｎｏｗｍｕｃｈａｔｔｅｎｔｉｏｎｈａｓｂｅｅｎｄｉｒｅｃｔｅｄｔｏｗａｒｄｓｔｈｅｒｅｓｅａｒｃｈｏｎａｃｉｄｉｃ ,ｒｅｄｏｘｏｒｄｉｆｕｎｃｔｉｏｎａｌｃａｔａｌｙｓｔｓ[1～ 3] .Ｖａｃａｎｔｈｅｔｅｒｏｐｏｌｙｃｏｍｐｌｅｘｉｓａｎａｃｔｉｖｅｉｎｏｒｇａｎｉｃｌｉｇａｎ…     

Synthesis and Properties of Heteropoly Tungstovanadogermanic Complexes with Rare Earths

Ｈｅｔｅｒｏｐｏｌｙｃｏｍｐｏｕｎｄｉｓａｎｅｗｃａｔａｌｙｓｔｗｉｔｈｍａｎｙｆｕｎｃｔｉｏｎｓｉｎｃｈｅｍｉｓｔｒｙｉｎｄｕｓｔｒｙ .Ｉｔｓｅｘｃｅｌｌｅｎｔｃａｔａｌｙｔｉｃｐｅｒｆｏｒｍａｎｃｅｉｓｄｅｔｅｒｍｉｎｅｄｂｙｉｔｓｃｏｍｐｏｓｉｔｉｏｎａｎｄｓｔｒｕｃｔｕｒｅ .Ｉｔｈａｓｓｉｍｐｌｅｃｏｍｐｏｓｉｔｉｏｎａｎｄｆｉｘｅｄｓｔｒｕｃｔｕｒｅ ,ａｌｔｈｏｕｇｈｉｔｍａｙｃｏｎｓｉｓｔｏｆｍａｎｙｅｌｅｍｅｎｔｓ .Ｉｔｓｓｔｒｕｃｔｕｒｅａｎｄｐｒｏｐｅｒｔｙｃａｎｂｅｃｈａｎｇ…     

配合物NH4[Ln（H2O）9][（VⅣO）2（μ2-O）（nta）2]（Ln=Sm,Y）的合成及钐配合物的晶体结构

在水溶液中合成了两个钒-稀土配合物NH4[Ln(H2O)9][(VIVO)2(μ2-O)(nta)2](Ln=Sm,Y),其中钒-钐配合物为单晶体,钒-钇配合物为多晶态粉末。单晶X-射线衍射分析表明,钒-钐配合物属单斜晶系,C2/c空间群,晶胞参数a=2.336(4),b=1.0907(9),c=1.0823(10)nm,β=93.21(2)°,V=2.753(6)nm3,Z=4。配合物包含了一个二核的钒阴离子[(VIVO)2(μ2-O)(nta)2]4-(H3nta=氨三乙酸)和一个九配位的钐阳离子[Sm(H2O)9]3+,两者通过氢键连接成三维超分子结构。     

Syntheses, characterization, and luminescence of two lanthanide complexes [Ln2(acetate)6(H2O)4]·4H2O (Ln=Tb(1), Sm(2))

Two dinuclear compounds [Ln2(acetate)6(H2O)4]·4H2O (Ln=Tb(1), Sm(2)) were obtained by the hydrothermal reaction of Ln2O3 with malonic acid at 150 ℃. Both compounds were characterized by elemental analyses, infrared spectra, and single crystal X-ray diffraction. The results showed that complexes 1 and 2 were isomorphous and crystallize in triclinic space group P(-1). The coordination geometry around Ln(III) ions in the complexes 1 and 2 was a distorted tricapped trigonal prism with a nine coordination. In the crystal, the molecular organization was further stabilized by well-defined weak hydrogen bonding interactions between the neutral dinuclear molecular units that led to the formation of a three-dimensional network. The fluorescence properties of the two complexes 1 and 2 in organic solvents were also studied. The results show that the ligand acetate favored energy transfer to the emitting energy level of Tb(III) in complex 1. Some factors that influence the fluorescent intensity were also discussed in the article.     

Synthesis, Characterization and Fluorescence of Phenylcarboxymethyl Sulfoxide Complexes with Lanthanide Nitrates

Ｒａｒｅｅａｒｔｈｃｏｍｐｌｅｘｅｓｗｉｔｈｓｕｌｆｏｘｉｄｅａｎｄａｒｏｍａｔｉｃｃａｒｂｏｘｙｌａｃｉｄｈａｖｅｂｅｅｎｗｉｄｅｌｙｓｔｕｄ ｉｅｄ[1～ 3 ] .Ｉｔｉｓｐｒｏｖｅｄｔｈａｔｔｈｅｙｂｏｔｈｈａｖｅｂｅｔ ｔｅｒｆｌｕｏｒｅｓｃｅｎｃｅｃｈａｒａｃｔｅｒ .Ｈｏｗｅｖｅｒｔｈｅａｒｏ ｍａｔｉｃｃａｒｂｏｘｙｌｏｆｒａｒｅｅａｒｔｈｃｏｍｐｌｅｘｅｓｈａｖｅｖｅｒｙｈｉｇｈｆｌｕｏｒｅｓｃｅｎｃｅｅｍｉｓｓｉｏｎｉｎｔｅｎｓｉｔｙａｎｄｓｔａｂｉｌｉｔｙ ,ｂｕｔｓｏｌｕｂｉｌｉｔｙｉ…     

Syntheses and Characterizations of Cu-Ln Heterobinuclear Complexes with Schiff Base from 3-Formylsalicylic Acid and Ethylene Diamine

ＴｈｅｈｏｍｏａｎｄｈｅｔｅｒｏｂｉｎｕｃｌｅａｒｃｏｍｐｌｅｘｅｓｏｆｔｈｅｄｂｌｏｃｋｅｌｅｍｅｎｔｓｃｏｏｒｄｉｎａｔｅｄｗｉｔｈＥＳｈａｖｅｂｅｅｎｓｔｕｄｉｅｄ[1,2].Ｈｏｗｅｖｅｒ,ｌａｎｔｈａｎｉｄｅｈｅｔｅｒｏｂｉｎｕｃｌｅａｒｃｏｍｐｌｅｘｅｓｗｉｔｈｔｈｉｓｌｉｇａｎｄｈａｖｅｒａｒｅｌｙｂｅｅｎｒｅｐｏｒｔｅｄ.ＵｓｉｎｇＮａ2ＣｕＥＳ·Ｈ2Ｏａｓｌｉｇａｎｄ,ｗｅｓｙｎｔｈｅｓｉｚｅｄｓｅｖｅｎｈｅｔｅｒｏｂｉｎｕｃｌｅａｒｃｏｍｐｌｅｘＣｕＬｎＥＳＣｌ·ｎＨ2Ｏ(Ｆｉｇ.1,Ｌｎ=…     

Synthesis, Characterization of α-Oxopentanedioic Acid-Isonicotinoyl Hydrazone Rare Earth-Complexes and Relaxivity of Gd-complex

Themagneticresonanceimaging (MRI)tech niqueforthemedicineisveryusefultodiagnosepre tumorandbloodvesseldiseaseinheartandbrainandothermalignantpre diseases .Therefore ,specialatten tionhasbeenalsopaidtoMRIcontrastagents ,whichareindispensablediagnosingdrugsforthemagneticresonanceimagingtechnique[1,2 ] .Gadolinium (Ⅲ)complexwithsomepolycarboxylicandpolyaminelig ands ,suchasGd(DTPA)·nH2 O ,waswidelyusedincliniclongago .OurpreviousworkshowsthatsomepolycarboxylicSchiffbasecomplexeswithrareea…     

Hydrothermal syntheses and characterization of three lanthanide coordination complexes constructed by 2,2’:6’,2’’-terpyridine and 2,2’-biphenyldicarboxylic acid

Two 1D coordination polymers [Ln2(dpdc)3(tpy)2·H2O]n [Ln=Nd 1, Yb 2, H2dpdc=2,2’-biphenyldicarboxylic acid and tpy= 2,2’:6’,2’’-terpyridine] and one dinuclear complex Er2(dpdc)2(Hdpdc)2(tpy)2 3 were obtained via hydrothermal reactions and determined by X-ray diffraction analysis. The crystal structure data of 1 and 2 revealed that two coordination polymers were isostructural and possessed a 1D chain framework consisting of eight-coordinated Ln(III) centers. In the asymmetric unit, the two Er(III) ions in 3 were both nine-coordinated and had similar coordination environments. The Er(III) ions were bridged by dpdc2-ligands into dinuclear structures. The complexes were also characterized by IR spectra and thermogravimetric analysis. The solid fluorescence of 1 and 3 was also investigated at room temperature.     

A series of rare earth coordination polymer constructed from paddle-wheel building blocks

Three coordination polymers, Ln2（bpdc）3（phen）2（H2O）2 （Ln=Nd（1）, Eu（2）, and Tb （3）; bpdc=2,2＇-bipyridine-3,3＇-dicarboxylate; phen=1,10-phenanthroline）, were obtained by hydrothermal reaction of Ln2O3 with 2,2＇-bipyridine-3,3＇-dicarboxylate acid, and 1,10-phe- nanthroline. They were characterized by single-crystal X-ray diffraction, IR spectra, and photoluminescent spectra. The crystallographic data of 1-3 indicated that they were isostructural. Both complexes contained paddle-wheel building blocks, formed by bpdc and phen ligands. These paddle-wheel secondary building units （SBUs） were further connected to form two-dimensional （2-D） metal organic framework （MOF） networks by 2,2＇-bipyridine-3, and 3＇-dicarboxylate tinkers. A three-dimensional （3-D） supramolecular structure was formed by π-π aromatic interactions between adjacent 2-D infinite networks. Photoluminescent measurements indicated that europium compound 2 and terbium compound 3 were strong, red and green emitters, respectively.     

Fluorescence Properties of Eu3+/Gd3+/Citric Acid Mixed Complexes Doping in Silicon Rubber Matrix

Series of doped rare earth complexes-EuxGd(1-x)(CA)3·nH2O (CA=citric acid) were synthesized. Some characterizations were taken for these complexes. The experimental results shows that the doped rare earth complexes have the best fluorescence property when the ratio of Eu and Gd is from 0.7 to 0.3. Silicon rubber-based composites were prepared by mechanical blending the EuxGd(1-x)(CA)3·nH2O and silicon rubber. Then, the fluorescent property of the composites was studied. It is found that the fluorescence intensity of the composites increase linearly with the contents of the rare earth complexes increasing.     

Synthesis, structures,thermal and magnetic properties of a series of lanthanide [Ln=Sm, Gd, Er, Yb] complexes with 4-quinolineacarboxylate

A series of lanthanide binuclear complexes, [Ln2(L)6(H2O)4]·2H2O (Ln=Sm(III), Gd(III), Er(III), Yb(III), HL=4-quinolineacarboxylic acid, were synthesized by reactions of corresponding rare earth salts with 4-quinolineacarboxylic acid at room temperature and were characterized by elemental analysis, IR spectroscopy, and single-crystal X-ray diffraction. X-ray diffraction analyses showed that they exhibited the same binuclear architecture and crystallized in monoclinic system and P21/c space group. In four complexes, each metal center adopted nine-coordinated mode coordinated by nine O atoms from two H2O molecules and three carboxyls of three ligands, and HL showed three different coordination modes. The variable-temperature magnetic susceptibility showed that complex [Gd2(L)6(H2O)4]·2H2O performed very weak antiferromagnetic property at low temperature and exchange was almost paramagnetic at high temperature. Complexes [Er2(L)6(H2O)4]·2H2O and [Yb2(L)6(H2O)4]·2H2O performed dominating antiferromagnetic coupling.     

Stability of Rare Earth Ion-N, N′-bis（2′-Pyridine）methyl-1,10-Phenanthroline-2,9-Dimethanmine Binary Complexes

1 ,10 Phenanthrolinehasbeenextensivelyusedasanazaheterocyclicchelateligandinbothanalyticalandpreparativecoordinationchemistry[1] .Asanim portantligand ,1,10 phenanthrolineunitplaysanim portantroleforthedevelopmentofthesupramolecularchemistry .Manynovelsupramolecularcompoundsin clude 1,10 phenanthrolineunit[2～ 4 ] .Furthermore ,consideringtheuniquecombinationofchemicalstabil ities ,redoxproperties ,luminescenceemissionandex citedstatelifetime ,derivativesof 1,10 phenanthrolinehaveplayedama…     

Synthesis, characterization and antitumor activity of rare earth （Y, La） substituted phosphotungstates containing 5-fluorouracil

Two rare earth substituted Keggin-type phosphotungstates containing 5-fluorouracil,K10C4H4FN2O2Y(PW11O39)2·10H2O(FYPW) and K9(C4H4FN2O2)2La(PW11O39)2·18H2O(FLaPW)were synthesized in aqueous solution,and the structures were characterized by Fourier transform infrared spectroscopy(FT-IR),element analysis,inductively coupled plasma spectrometry(ICP),X-ray powder diffraction(XRD) and 1 H nuclear magnetic resonance(NMR).Thermal analysis showed that the decomposition processes of the two compounds could be divided into three steps,the loss of crystal water,the decomposition of 5-fluorouracil unit and the decomposition of Keggin-type polyanions. The in vitro cytotoxicities against HEK 293,HeLa and HepG-2 cells were studied by methyl thiazolyl tetrazolium(MTT)assay.The results showed that FYPW and FLaPW had higher antitumor activities than 5-fluorouracil,C4H4FN2O2H2PW12O40·8H2O and rare earth substituted polyoxometalates K11Ln(PW11O39)2·nH2O(Ln=Y,La).It was concluded that introducing 5-fluorouracil and rare earth(Y or La)into its structure was a considerable way to enhance antitumor activities of polyoxometalates.     

Synthesis,crystal structures of novel complexes of rare earth with norfloxacin,interaction with DNA and BSA

Three novel rare earth complexes [N(CH 3) 4 ][Ln(NF) 4 ]·6H 2 O(Ln=Nd(III)(1),Sm(III)(2),Ho(III)(3)) were synthesized using hydrothermal method from norfloxacin HNF=1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinoline carboxylic acid,C 16 H 18 FN 3 O 3),imidazole and rare earth nitrates.The complexes were characterized by elemental analysis,FT-IR,TG-DTG and X-ray single crystal diffraction.Each rare earth ion was eight-coordinated with carboxyl-O atoms and keto-O atoms from norfloxacin.Four of the norfloxacin ions acted as bidentate chelate group took part in the coordination with rare earth ion.The structures of complexes were tetragonal system with space group I4 1 /acd,which were allomerism.The interaction between complex 1 and DNA was studied by electronic absorption spectra and fluorescence spectroscopy.The binding interaction between the complex 1 and bovine serum albumin(BSA) was studied by fluorescence spectroscopy.The complex 1 bound to DNA by the mode of partial intercalation.Complex 1 had a strong ability to quench the fluorescence from BSA.The complex interaction was mainly a static quenching process with BSA together with formation of two binding sites.