共查询到20条相似文献,搜索用时 0 毫秒
1.
合成了硝酸钇(Ⅲ)与双希夫碱N,N′-二亚水杨基乙二胺、二甲基亚砜的配合物〔Y(C6H4OHCHNC2H4NCHC6H4OH)(NO3)3(CH3SOCH3)〕。x—射线单晶结构分析表明该晶体属单斜晶系、空间群为P21/n,a=0.9631(2)nm,b=1.6414(5)nm,c=1.6209(3)nm,β=102.98(2)°,Z=4,Dx=1.653Mg·m-3。Y(Ⅲ)配位数为9,配位几何为畸变的单帽四方反棱柱,所有的配位原子均为氧原子,分别来自三个硝酸根,一个二甲基亚砜和二个双希夫碱,中心离子被双希夫碱桥联,组成一维无限长链。 相似文献
2.
3.
《稀有金属与硬质合金》2016,(5)
采用溶解平衡法研究了(NH_4)_2HPO_4-NH_3·H_2O-H_2O系APT的溶解性能。随着氨水浓度增大,APT溶解度由略微下降转为较快上升,溶液中磷钨杂多酸浓度大幅降低,而同多钨酸根和正钨酸根浓度大幅升高。相同磷酸氢二铵浓度下(NH_4)_2HPO_4-NH_3·H_2O-H_2O系APT溶解度远大于(NH_4)_2HPO_4-H_2O系。 相似文献
4.
Synthesis and Structural Determination of Eight Coordinate NH_4[Yb(Ⅲ)(Cydta)(H_2O)_2]·5H_2O 总被引:1,自引:0,他引:1
ecausesomerareearthmetalcompoundshavethepromotiveactiontothegrowthofani malsandplants[1 ] ,andthefunctionofantiin flammation ,antibacterium ,anticoagulantionandanticaner[2 ] ,theinvestigationonthesyn thesesandstructuresoftheeverykindsofrareearthmetalcompounds… 相似文献
5.
采用水热法合成了稀土配位聚合物{[Nd2(C2O4)3(H2O)6].3CH3OH}n(1),得到该配合物的粉红色块状晶体,并对其进行了元素分析。用单晶x射线衍射法测得其晶体结构,属单斜晶系,空间群为P21/c,晶胞参数为:a=1.1200(2)nm,b=0.96325(17)nm,c=1.02580(18)nm,α=90°,β=114.278(3)°,γ=90°,Z=4,V=1.0088(3)nm3。配合物中钕离子为九配位,与配体结合生成蜂窝状二维层,通过氢键的连接形成了三维超分子配合物。 相似文献
6.
[HoAl(CF_3COO)_2(CF_3CHOO)(C_2H_5)_2(C_4H_8O)_2]_2,Mr=1468.7,monoclinic,P 2_1/n,a=1.0084(4),b=1.8453(6),c=1.4501(6)nm,β=102.40(3)°,V=2.6355(1)nm~3,Z=2,D_c=1.81gcm~(-3),F(000)=1511,T=233K,Mo Kα radiation(λ=0.071069nm).R=0.052 for 6176 unique reflections[Ⅰ≥36(Ⅰ)].The structuralunits consist of dimeric molecules with the mixed ligand and central bimetallic atoms,which are polynuclearlanthanoid complexes containing aluminium.Ho-Ho'distance is 0.3619(1)nm.The coordination polyhedron ofHo can be described in terms of a distored bicap-prism. 相似文献
7.
8.
Synthesis and Crystal Structure of [Yb(NTO)_3(H_2O)_4]·6H_2O 总被引:3,自引:0,他引:3
SynthesisandCrystalStructureof[Yb(NTO)3(H2O)4]·6H2OSongJirong(宋纪蓉),DongWu(董武)(DepartmentofChemicalEnginering,NorthwestUniver... 相似文献
9.
Inthepastfewyears ,themagneticprop ertiesofcomplexescomprisinglanthanideandtransitionmetalionshaveattractedincreasinginterest[1~ 6 ] .Thesecomplexesareimportantinthestudiesofmagneticexchangeinteractionbetweenlanthanideandd transitionmetalions,andtheycanpro… 相似文献
10.
11.
Crystalengineeringofcoordinationpoly merswithopenframeworksassembledfromor ganic metalcompoundshasbeenofgreatinter estsowingtotheirpotentialpropertiesasnovelmaterialssuchasgasadsorption[1,2 ] ,ion ex change[3] andcatalysis[4] .Theconstructionofcoordinationpolym… 相似文献
12.
13.
着重讨论水溶性较大的(NH_4)_2 〔Ce(NO_3)_6〕络合物制备过程中酸度、硝酸铵量、温度等对其合成的影响,并用(NH_4)_2 〔Ce(NO_3)_6〕-NH_6NO_3-H_2O的罗什布相图说明硝酸高铈铵在硝酸铵的水溶液中的溶解度变化。 相似文献
14.
The crystal structure of title complex has been determined by the method of X-ray single crystaldiffraction.The crystal belongs to monoclinic space group C_(2/c)with the unit parameters a=2.8907(7),b=2.0431(5),c=1.5723(3)nm;β=115.67(2)°.The unit volume V is 8.36924(348)nm~3;Z=8,Dc=1,82g·cm~(-3),μ(MoK_α)=46.4cn~(-1); F(000)=4416.The final R is 0.083,Rw 0.088.The title complex con-sists of two univalent cations and one divalent anion.The anion has a cluster structure including six Sm~(3 ).Coordination numbers of all six Sm~(3 )are eight,but their surroundings are different from each other.Two ofthem are decahedral array,and the others are octahedral array f the centroid of each pentacyclodienyl ring istaken as one point. 相似文献
15.
Rareearthionspossessobviousfosteref fectonthegrowingofcrop[1] .Aminoacidsarethecomponentsofproteins ,andtherearemanyreportsaboutthestudyonthebinarycomplexesofrareearthwithaminoacids[2 ,3] .Imidazoleisaheteroclycliccompoundpossess ingbactericideandanti infecti… 相似文献
16.
17.
Y_2W_3O_(12)和Yb_2W_3O_(12)的制备及其负热膨胀性能 总被引:1,自引:0,他引:1
利用液相沉淀法制备了Y2W3O12和Yb2W3O12粉体。经室温XRD测定,Y2W3O12(空间群为Pnca)和Yb2W3O12(空间群为Pbcn)皆为单一的正交相。在50-800℃温度区间对两种粉体进行高温XRD测试,并利用软件TOPAS3.0对其在不同温度下的XRD图谱进行精修,发现Y2W3O12和Yb2W3O12都具有较大的负热膨胀特性,经计算两者的线热膨胀系数(αl)平均值分别为-6.38×10-6℃-1和-4.18×10-6℃-1。与高温固相反应法相比,液相沉淀法大大缩短了粉体的合成周期,降低了合成温度。 相似文献
18.
19.
Recently ,therehasbeenconsiderablein terestinlanthanide(Ⅲ )hexacyanoferratesandtheanalogouscobalt(Ⅲ )aswellaschromium(Ⅲ )complexesbecauseoftheirpotentialascatalytic ,semiconductive ,andmagneticmate rials[1~ 4] .Forexample ,magneticstudiesonaseriesofthree dimensio… 相似文献
20.
MechanochemicalEfectsinLn2O3Ln(OH)3(H2O)(Ln=La,Nd)SystemDimitrTodorovsky,AtanasTerziev(FacultyofChemistry,UniversityofSofia... 相似文献