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…     

Synthesis and Characterization of Rare Earth Complexes of Ferrocenylcarbonylhydrazine

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

Synthesis, Characterization and Fluorescence Properties of Europium, Terbium Complexes with Biphenyl-4-Carboxylic Acid and o-Phenanthroline

Two series of solid complexes of europium and terbium with biphenyl 4-carboxylic acid and phen were synthesized and characterized in this report. Their elemental analysis, molar conductivities and TG-DTA studies indicate that the complexes have the composition of Eu(phen)L3·1/2H2O, Eu0.5RE0.5(phen)L3·1/2H2O; Tb(phen)L3·H2O and Tb0.5RE0.5(Phen)L3·1/2H2O. (RE=Y3 , La3 and Gd3 ; L=biphenyl 4-carboxylic acid; phen=o-Phenanthroline). The studies of their IR, UV 1H NMR and molar conductivities demonstrate that biphenyl 4-carboylic acid is bounded with RE(Ⅲ) ion. Rare earth ions coordinate with two nitrogen atoms of phen molecules directly in these rare earth complexes. The fluorescence spectra and fluorescence lifetimes of the rare earth complexes show that the fluorescent intensity and lifetime of a series of europium complexes are longer than those of the series of terbium complexes as having the some ligands. There are better fluorescent intensity and lifetime of hetero-nuclear rare earth complexes than homo-nuclear rare earth complexes for europium complexes. The fluorescence emission intensity of Eu3 is raised by inert fluorescent rare earth ions (Y3 , Gd3 and La3 ), but in Tb3 hetero-nuclear rare earth complexes the intensity of Tb3 ions are quenched by the inert fluorescent rare earth ions.     

双水杨醛1,6-己二胺希夫碱轻稀土配合物的合成和表征

合成并表征了双水杨醛缩 1,6 己二胺希夫碱配体 (C2 0 H2 4 N2 O2 ,以L表示 )与轻稀土Ln3 的 7种新的固体配合物 [LnL2 ](NO3) 3(Ln =La、Ce、Pr、Nd、Sm、Eu、Gd)。利用元素分析、摩尔电导、红外光谱、电子光谱、X射线衍射物相分析、热分析方法进行表征。中心金属离子Ln3 与希夫碱配体中的亚胺氮和酚羟基中的氧发生配位 ,配位数为 8。     

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

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

Synthesis and Characterization of Ln(NO_3)_3-Phen-Fu Ternary Complexes

ＳｙｎｔｈｅｓｉｓａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＬｎ（ＮＯ３）３ＰｈｅｎＦｕＴｅｒｎａｒｙＣｏｍｐｌｅｘｅｓＬｉｎＪｉｙｕｎ（林纪筠），ＭａＤｅｊｉａｎ（马德建）（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＥａｓｔＣｈｉｎａＮｏｒｍ...     

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

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

稀土(Ⅲ)硝酸盐与4-羟基-3-甲氧基苯甲醛缩乙二胺双希夫碱配合物的合成与性质

由双希夫碱４－羟基－３－甲氧基苯甲醛缩乙二胺与稀土（Ⅲ）硝酸盐（Ｌａ，Ｎｄ，Ｇｄ，Ｔｂ，Ｈｏ），合成了五种固体配合物。对配合物进行了元素分析、摩尔电导、红外光谱、紫外光谱、差热—热重分析。确定了配合物的组成为ＬｎＬ（ＮＯ３）３。     

Preparation and Characterization of Heteropolytungstoarsenate Complexes Containing Lanthanide Elements

ＰｒｅｐａｒａｔｉｏｎａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＨｅｔｅｒｏｐｏｌｙｔｕｎｇｓｔｏａｒｓｅｎａｔｅＣｏｍｐｌｅｘｅｓＣｏｎｔａｉｎｉｎｇＬａｎｔｈａｎｉｄｅＥｌｅｍｅｎｔｓ￥ＷａｎｇＷｅｉｑｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｃ...     

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.     

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 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.     

Studies on Heterobinuclear Complexes of Ln3 and Zn2 with Acyclic Polyether Schiff Base

Ｔｈｅｒａｐｉｄｌｙｇｒｏｗｉｎｇｉｎｔｅｒｅｓｔｉｎｐｏｌｙｎｕｃｌｅａｒｃｏｍｐｌｅｘｅｓａｒｉｓｅｓｆｒｏｍｔｈｅｓｉｇｎｉｆｉｃａｎｔｒｏｌｅｗｈｉｃｈｈａｓｐｌａｙｅｄｉｎｔｈｅｅｘｔｅｎｓｉｖｅａｒｅａｓｏｆｃａｔａｌｙｓｔｓ,ｍａｇｎｅ...     

Synthesis and Thermal Decomposition Mechanism of Rare Earth Benzoates

Rareearthbenzoatesareakind0fstablecompounds.Theco0rdinationcomP0undsf0rmedbyrareearthandcarboxylicacidshaveunusualstructuresandinterestinglundnesceniProperties.Bymeansoff0rmingc0njugaedcomplexes,rareearthmetalsandcarb0xylicacidscanf0rmnetorlayerp0lymerandchangetheirlundnescentprop-erties.S0merareearthcomplexeshavebeenap-Pliedinagricultureaslight-transfeedngmaeri-al8-Althoughthermaldecompositi0nmechanismofrareearthbenz0ateshasbeenreported,itdealswith0nlys0lidphaseproducts["'1,litdeab0utgasPha…     

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。     

Effects of rare earth oxides on dielectric properties of Y2Ti2O7 series ceramics

A series of Y2Ti2O7 microwave dielectric ceramics were synthesized by conventional solid-state method. The effects of rare earth oxide (La2O3, CeO2, Nd2O3, Sm2O3, Eu2O3, Gd2O3 and Dy2O3) and Nd2O3 doping content on the microstructure and dielectric properties of Y2Ti2O7 ceramics were investigated. The experimental results showed that the rare earth ions were considered to dissolve in Y-sites of the pyrochlore structure, different rare earth oxides and concentration had different influences on Y2Ti2O7 cerami...     

1，2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-[1，2]与三正辛基氧化膦协同萃取RE(Ⅲ)的性能和机理研究

研究了1，2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-[1，2](H     

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.     

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…     

Raman spectra of RE2O3 （RE=Eu,Gd, Dy,Ho, Er,Tm, Yb,Lu, Sc and Y）：laser-excited luminescence and trace impurity analysis

Raman spectra of a series of cubic rare earth sesquioxides RE2O3 （RE=Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, Sc and Y） were investigated by Raman spectroscopy with both 532 and 785 nm laser lines. Abundant additional bands due to laser-excited lumines-cence were observed. For Eu2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3 and Yb2O3, the luminescence mainly came from the intrinsic trivalent lanthanide ions, while for Gd2O3, Lu2O3, Sc2O3 and Y2O3, their luminescence were attributed to the trace impurities of other lumines-cent lanthanide ions such as Eu3＋, Nd3＋and Er3＋. This investigation confirmed Raman spectroscopy as a useful tool for detecting trace luminescent lanthanide impurities.