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

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

Physico-chemical properties of 3-methoxy-2-nitrobenzoates of some rare earth elements（Ⅲ）

The complexes of 3-methoxy-2-nitrobenzoates of Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III), Er(III) and Tm(III) with the formula: Ln(C8H6NO5)3·2H2O, where Ln=lanthanides(III), were synthesized and characterized by elemental analysis, Forier transform irtrared (FTIR) spectroscopy, magnetic and thermogravimetric studies and also by X-ray diffraction (XRD) measurements. The complexes had col- ours typical for Ln(III) ions. The carboxylate groups bound as bidentate chelating. On heating to 1173 K in air they decomposed in the same way, at first, dehydrated in one step to anhydrous salts, and then decomposed to the oxides of respective metals with intermediate formation of the oxycarbonates. The enthalpy values of the dehydration process changed from 133.72 to 44.50 kJ/mol. Their solubility in water at 293 K was of the order of 10-4 mol/dm3. The magnetic moments of analysed complexes were determined by Gouy’s method in the range of 76-303 K.     

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。     

Synthesis and Characterization of Rare Earth Complexes of Ferrocenylcarbonylhydrazine

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

含N_2O_2四齿希夫碱配体的稀土有机配合物的合成和表征

室温下 ,采用 Schlenk操作技术 ,用 Cp3L n和对称的希夫碱双水杨醛缩邻苯二胺 ( H2 SAL OPHEN)为原料 ,物质的量之比为 1∶ 1,在四氢呋喃介质中反应 ,合成了六个新型配合物 Cp L n SAL OPHEN( L n=Y,Pr,Sm,Ho,Er,Tm)。所有这些配合物都经过了元素分析、IR和 Ms表征     

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

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

碳酸根型镁铝复合氢氧化物的合成与表征

采用共沉淀法制备了MgA l-HTLes,利用X射线衍射、红外光谱、扫描电镜(SEM)对合成物进行了表征。讨论了pH值、原料配比、晶化方式对合成镁铝水滑石结构的影响。结果表明在体系[OH-]/[Mg2+]/[A l3+]=16∶6∶1,pH值8.5~9.5,[CO32-]值2~4条件下采用共沉淀法且用水热晶化方式可得到晶相单一的、高纯度的MgA l-HTLes。     

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。     

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.     

Nd（Ⅲ）、Sm（Ⅲ）、Eu（Ⅲ）与邻香兰素缩邻苯二胺配合物的合成与性质

合成了稀土硝酸盐与双希夫碱邻香兰素缩邻苯二胺（以Ｌ表示）的３种新固体配合物。通过元素分析、红外光谱、紫外光谱、差热一热重、摩尔电导及Ｘ射线粉末衍射分析等手段，确定配合物的组成为（ＬｎＬ（ＮＯ３）２）ＮＯ３（Ｌｎ＝Ｎｄ、Ｓｍ、Ｅｕ）。并对其结构和某些物理化学性质进行了研究。     

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…     

2,5-二巯基-1,3,4-噻二唑稀土有机配合物的合成及表征

用２,５－二巯基－１,３,４－噻二唑与三环戊二烯基或三（甲基环戊二烯基）稀土配合物反应,合成了五个分子内含Ｌｎ－Ｓ与Ｌｎ－Ｎ配键的稀土金属有机配合物。这些配合物均经过元素分析、红外光谱及质谱表征。有关数据表明,它们都是二齿配位的双核配合物。     

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, 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.     

Synthesis, Crystal Structure of [ （MeC5H4）2Ln（μ-OCH2 CH2NMe2 ） ]2 （Ln = Sm, Y, Nd） and Their Catalytic Activity for Ring-Opening Polymerization of ε-Caprolactone

Reaction of (MeC5H4)3Ln with HOCH2CH2NMe2 in tetrahydrofuran (THF) gives the new complexes [ (MeC5H4)2Ln(μ-OCH2CH2NMe2)]2(Ln = Sm, Y, Nd) with nitrogen functionalized μ-alkoxide ligand. The complexes were characterized by elemental analysis and IR, and [ (MeC5H4)2Sm(μ-OCH2CH2NMe2)]2 was structurally characterized by the X-ray diffraction to be a dimer formed by two unsymmetric oxygen bridges. The complex has a tricyclic skeleton with the additional two Sm- N bonds via intmmoleeular coordination of OCH2CH2NMe2. The coordination number of the central metal Sm is nine. The tide complexes show good catalytic activity for ring-opening polymerization of ε-capmlactone.     

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.     

Synthesis and Characterization of Gadolinium Doping M-type Hexagonal Barium Ferrite Ultrafine Powders

Becausepermanentbariumferritematerialpos sessesrelativelyhighsaturationmagnetization ,greatcoerciveforceandhighmagneticanisotropyfieldaswellasexcellentchemicalstabilityandcorrosionresis tance ,ithasbeenwidelyusedastraditionalperma nentmagnets ,high densitymagneticandmagneto op ticrecordingmedia ,microwavefilters[1,2 ] .Thusthestudyonthesynthesisofmagnetoplumbite typebariumferriteisconsiderablyimportanttotheelectronicandmagneticmaterialsindustry .Duringthelastfewdecades ,peoplehavemadegreateffo…     

Preparation and Characterization of Heteropolytungstoarsenate Complexes Containing Lanthanide Elements

ＰｒｅｐａｒａｔｉｏｎａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＨｅｔｅｒｏｐｏｌｙｔｕｎｇｓｔｏａｒｓｅｎａｔｅＣｏｍｐｌｅｘｅｓＣｏｎｔａｉｎｉｎｇＬａｎｔｈａｎｉｄｅＥｌｅｍｅｎｔｓ￥ＷａｎｇＷｅｉｑｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｃ...     

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

Ｔｈｅｒａｐｉｄｌｙｇｒｏｗｉｎｇｉｎｔｅｒｅｓｔｉｎｐｏｌｙｎｕｃｌｅａｒｃｏｍｐｌｅｘｅｓａｒｉｓｅｓｆｒｏｍｔｈｅｓｉｇｎｉｆｉｃａｎｔｒｏｌｅｗｈｉｃｈｈａｓｐｌａｙｅｄｉｎｔｈｅｅｘｔｅｎｓｉｖｅａｒｅａｓｏｆｃａｔａｌｙｓｔｓ,ｍａｇｎｅ...     

Effect of auxinhormone lanthanide complexes on the growth of wheat coleoptile

Naphthalene-1-acetic acid (HNAA), dichlorophenoxy acetic acid (HDAA), and indole-3-acetic acid (HIAA) are auxinhormones that can affect the growth of plants. The lanthanide complexes of the above auxinhormone LnA3 x 3H2O (Ln = La3+, Ce3+, Sm3+, Er3+, Yb3+; HA = HNAA, HDAA, HIAA; A = NAA-, DAA-, IAA-) were synthesized and are characterized in this paper. The solubility and IR spectra of these complexes were also studied. Experiments of the effects of LnCl3 x nH2O, HA, and LnA3 x 3H2O on the growth rate of wheat coleoptile sections show, that LnCl3 x nH2O promotes the growth of wheat coleoptile when this compounds concentration is lower than 2 x 10(-5) M and the promotion is very significant when the concentration of Ln3+ is lower than 8 x 10(-6) M. It was also found that the effect of LnA3 x 3H2O on the growth of wheat coleoptile is stronger than that of LnCl3 x nH2O and HA, which indicates that the combination of Ln3+ with HA act synergistically.