共查询到20条相似文献,搜索用时 109 毫秒
1.
RECl_3与Gly间配合行为的半微量相平衡研究 总被引:5,自引:1,他引:4
测定了RECl_3-Gly-H2_O(RE=Sm,Dy,Yb)三元体系在25℃时的溶度和饱和溶液折光率,绘制了相应的溶度图和饱和溶液折光率曲线。各体系的溶度曲线与折光率曲线均由四支组成,分别与RECl_3·6H_2O,RE(Gly)Cl_3,2H_2O,RE(Gly)_3Cl_3·3H_2O和Gly相对应。制备了5个未见文献报道的化合物:RE(Gly)_3Cl_3·3H_2O(RE=Ce,Pr,Nd,Sm,Dy),并用化学分析、元素分析、IR、FS、X-粉末衍射和TG-DTG对其进行了表征。 相似文献
2.
3.
4.
5.
Eu~(3+)IonasLuminescentProbe:Eu~(3+)SitesinEu(PBI)_3·phenand[Eu(PBI)_3·C_2H_5OH·H_2O]·H_2OComplexes¥JinLinpei(金林培)(DepartmentofCh... 相似文献
6.
从高镁低锂卤水中萃取锂的机理研究 总被引:1,自引:0,他引:1
研究了SKSE混合萃取剂在高氯离子浓度和弱酸性条件下,以FeCl3为共萃取剂从高镁卤水中萃取锂的反应。测定了SK和SE的浓度对萃取的影响。用化学分析法、斜率法确定萃合物组成为LiFeCl4·SK·2SE;红外光谱分析认为在此体系中萃取锂为溶剂化萃取机理,SK中C=O键和SE中P=O、C-O键上的氧原子主要参与键合配位,其萃取反应方程式为Li+(a)+FeCl-4(a)+SK(o)+2SE(o)=(LiFeCl4·SK·2SE)(o) 相似文献
7.
8.
本文对二茂铁甲酸作为配体与十四种稀土元素形成的配合物进行了XPS谱测定,讨论了它们的组成及Ln4d5/2、Ols、Cls、Fe2pl/2、Fe2p3/2谱和伴峰现象,说明了配合物形成过程中稀土化合物的电子结构变化和成键情况,配合物的组成为:[η5C5H5Feη5C5H4COO]3Ln·H2O,(Ln=La~Lu,Pm除外)。 相似文献
9.
CrystalStructureandSpectraoftheComplexEu(p-ClC_6H_4COO)_3C_(12)H_8N_2JinLinpei(金林培)(DepartmentofChemistry,BeijingNormalUniversit... 相似文献
10.
11.
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. 相似文献
12.
Synthesis, Characterization and Vulcanizing Properties of Rare Earth Complexes with 2-Mercaptobenthiazole 总被引:9,自引:1,他引:8
2 mercaptobenzothiazolewasfirstreportedbyHofmann[1 ] in 1 887.Ithasbeenusedasanacceleratorinthevulcanizationofrubberformanyyears .Todayitisstillbeingusedasamainacidicacceleratorinrubberindustry .Butithasdisadvantagesofvulcanizationreversionandeasyscorch[2 ] whe… 相似文献
13.
The rare earth nitrate complexes with 2,2′:4′,4″:2″,2-quaterpyridine (L) were prepared in ethylacetate. These new complexes with the general formula [RE(NO3)3L]*H2O (RE = La, Pr, Eu, Tb, Er, Y) were characterized by elemental analysis, IR spectra, thermal analysis and molar conductance measurements. The luminescence properties of these complexes were also studied. 相似文献
14.
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. 相似文献
15.
16.
17.
Five novel ternary complexes were synthesized by the rare earth with 2,6-pyridine dicarboxylic acid andα-picolinic acid.These complexes were characterized by elemental analysis,molar conductivity,FT-IR,UV-Vis,Raman,TG-DTA and XRD.The general formula of the complexes was[RE(DPA)(L α )(H2O)]·2H2O(RE=Pr 3+ ,Nd 3+ ,Sm 3+ ,Eu,Er 3+ ;DPA=2,6-pyridine dicarboxylic acid;L α =α-picolinic acid). The investigation of fluorescence properties of the Eu-complex showed that the Eu(III)ion could be sensitized efficiently by the ligand to some extent.The antibacterial activity test indicated that all the five complexes exhibited antibacterial ability against Escherichia coli and Staphylococcus aureus with broad antimicrobial spectrums. 相似文献
18.
合成了2,3-二氯异丁酸根和4-甲基吡啶氮氧化物稀土三元配合物(RE=La、Ce、Pr、Nd、Sm、Eu).通过元素分析、红外、紫外、荧光、X射线粉末衍射、XPS、热分析以及摩尔电导等分析手段,确定了配合物的组成为[REL3(4-picNO)H2O](L= CH3C2H2Cl2COO -),并对它们的性质进行了讨论. 相似文献
19.
Rareearthbenzoatesareakind0fstablecompounds.Theco0rdinationcomP0undsf0rmedbyrareearthandcarboxylicacidshaveunusualstructuresandinterestinglundnesceniProperties.Bymeansoff0rmingc0njugaedcomplexes,rareearthmetalsandcarb0xylicacidscanf0rmnetorlayerp0lymerandchangetheirlundnescentprop-erties.S0merareearthcomplexeshavebeenap-Pliedinagricultureaslight-transfeedngmaeri-al8-Althoughthermaldecompositi0nmechanismofrareearthbenz0ateshasbeenreported,itdealswith0nlys0lidphaseproducts["'1,litdeab0utgasPha… 相似文献
20.
Studies on synthesis and fluorescent property of rare earth complexes RE(ABMF)2AA and copolymers RE(ABMF)2AA-co-MMA 总被引:2,自引:0,他引:2
Four new complexes RE(ABMF)2AA (RE=Sm, Eu, Tb, Dy) were synthesized by the reaction of RECl3·6H2O with acrylic acid (HAA) and 1-(2-furyl)-3-phenyl-1,3-propanedione (ABMF). The copolymerization of the rare earth complexes with methyl methacrylate was studied by using 2,2-azobis-isobutyronitrile as an initiator. The composition and structure of the four complexes were characterized by elemental analysis, UV-vis and FTIR. The glass transition temperature and molecular weight of the copolymers were determined. Photoluminescent measurement showed that ligand ABMF could efficiently transfer the energy to Sm3+ and Eu3+ ions in the complexes and sensitize the luminescence of the rare earth ions, but could not sensitize Tb3+ and Dy3+ ions. As a result, both Sm3+ and Eu3+ complexes emitted the characteristic fluorescence of Sm3+ and Eu3+ ions due to the f-f transitions. The four copolymers could emit strong fluorescence of the rare earth ions. 相似文献