1,10-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)癸二酮-[1,10]的稀土络合物的研究

在无水乙醇与三氯甲烷的混和溶剂中制备3 1,10-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)癸二酮-[1,10]与镧、铈、钕、铕、铒、钇的络合物,通过元素分析确定了它们的组成;测定了络合物的溶解性和热稳定性;从络合物的红外光谱等推测出络合物的结构。     

Crystal Structure and Luminescence Property of Lanthanide Complexes with 2-Fluorobenzoic Acid and 2,2′-Bipyridine

Lanthanidemixed ligandscarboxylatecomplexes containing2,2′bipyridineor1,10phenanthrolinehavebeenwidelystudied[1～12],becausethesecom plexesexhibitvariouskindsofstructuraltypes,high stabilityandintensefluorescencecharacter.Inpartic ular,europiumcomplexeso…     

Synthesis of novel europium complexes and their photoluminescence properties

Two novel luminescent Eu(III) complexes with the formulas(NIP)Eu(DBM)3 1 and(ENIP)Eu(DBM)3 2(NIP=2-(naphtha-len-1-yl)-1H-imidazo [4,5-f] [1,10] phenanthroline,ENIP=1-ethyl-2-(naphthalen-1-yl)-1H-imidazo [4,5-f] [1,10] phenanthroline,DBM= dibenzoylmethanato) were successfully synthesized and characterized by IR and elemental analysis.The UV-vis absorption spectra and pho-toluminescence properties of the complexes were investigated,and the irradiation at the absorption band between 300-400 nm of europium complexes either in solution or in the solid state led to the emission of a sharp red band at ~610 nm,a characteristic Eu3+ emission due to the transition of 5D0→7F2.Furthermore,the weak emission bands around 587 and 595 nm attributed to 5D0→7F0 and 5D0→7F1 transition were also displayed in the emission spectra.These results demonstrated that the Eu(III) ion was sensitized efficiently by the ligand and displayed photoluminescence with high intensity,narrow half-peak width,and monochromic light.The excited-state lifetimes of 1 and 2 were in the microsecond time scale,but the photoluminescence quantum yield of 2(0.03) was two times higher than that of 1(0.01) which should be at-tributed to the effect of the ethyl substituting in ENIP.     

Thermal Stability and Luminescence Properties of Eu^3＋ and Tb^3＋ Complexes with a Silica Matrix by Sol-Gel Method

Ternary complexes of europium and terbium with benzoic acid and 1, 10-phenanthroline [RE(BA)3phen] (BA=benzoate phen=1,10-phenanthroline) were introduced into a silica matrix by sol-gel method. The thermal stability and luminescence behavior of the complexes in silica gels were studied in comparison with the corresponding solid-state complexes by thermal decomposition, excitation and emission spectra. The thermal stability of the complexes is enhanced in silica gel matrix and the luminescence remaines unchanged.     

Synthesis,crystal structure,and fluorescence of two dimeric europium（Ⅲ） complexes with 2-（trifluoromethyl）benzoate

Two complexes [Eu2（2-TFMBA）6（2,2′-bipy）2]·2H2O （1） and Eu2（2-TFMBA）6（1,10-phen）2 （2） （2-TFMBA=2-（Trifluoromethyl） benzoate; 2,2′-bipy=2,2′-bipyridine; 1,10-phen= 1,10-phenanthroline） were synthesized by solvent method and determined by X-ray diffraction analysis. Complex 1 crystallizes in monoclinic system with space group P21/c, whereas complex 2 crystallizes in triclinic system with space group Pi. Both are binuclear molecules with an inversion center. In complex 1, two center Eu^3＋ ions are linked together by four 2-TFMBA ligands in bidentate-bridging mode. Each Eu^3＋ ion is eight-coordinated with six O atoms from five 2-TFMBA ligands and two N atoms from one 2,2′-bipy molecule. In complex 2, two center Eu^3＋ ions are linked together by four 2-TFMBA ligands in two modes, namely, bidentate-bridging and tridentate-bridging. Each Eu^3＋ ion is nine-coordinated with seven O atoms from five 2-TFMBA ligands and two N atoms from one 1,10-phen molecule. The two complexes both exhibited strong red fluorescence under ultraviolet light, and the ^5D0→^7Fj （j=0-4） transition emissions of Eu^3＋ ion were observed in their emission spectra.     

一种基于同多钼酸盐支撑化合物{[Zn(phen)2]2(γ-Mo8O26)}的合成及其结构表征

本文采用非水热法合成了一个基于同多钼酸盐支撑的化合物{[Zn(phen)2]2(γ-Mo8O26)}(phen=1,10-phenanthroline),并采用红外光谱、热重分析以及单晶X射线衍射等方法对此化合物进行了表征.结果表明,目标化合物{[Zn(phen)2]2(γ-Mo8O26)}中包含一个[γ-Mo8O26]4-阴离子基团与两个[Zn(phen)2]2+配位单元;该化合物通过C-H···O氢键把phen和[γ-Mo8O26]4-阴离子紧紧连接起来,形成了一个三维的超分子结构.     

Thermochemical studies on complex of [Sm(o-NBA)_3phen]_2

A ternary complex [Sm(o-NBA)3phen]2 (o-NBA: o-Nitrobenzoate; phen: 1,10-phenanthroline) was synthesized and characterized by elemental analysis, IR, molar conductance, and thermogravimetric analysis. The dissolution enthalpies of SmCl3·6H2O(s), o-HNBA(s) and phen·H2O(s) in mixed solvent (VHCl :VDMF :VDMSO=2:2:1) were determined by calorimetry at 298.15 K. The enthalpy change of the reaction was determined to be rHmΔθ=252.49±1.60 kJ/mol. Using the relevant data in the literature and a thermochemical recycle according to Hess’s Law, the standard molar enthalpy of formation of [Sm(o-NBA)3 phen]2 (s) was estimated to be f mHΔθ=–4109.2±7.3 kJ/mol.     

1,10-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)癸二酮-〔1,10〕萃取钒(Ⅴ)的研究

本文研究了1,10-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)癸二酮-〔1,10〕(H_2A)在硝酸中萃取钒(V)的机理。测得萃合物的组成为 VO_2·HA,计算了萃取平衡常数。当有正丁醇存在时,由于溶剂化萃合物 VO_2·HA·C_4H_9OH 的生成,使 H_2A 对钒(V)的萃取速度加快,萃取率也有较大提高,萃取平衡常数也较无含氧溶剂存在时大几个数量级。在有机相中的萃合物呈红色,据此,建立了新的萃取光度法测定微量钒(V)。讨论了含氧溶剂对显色体系的增敏作用。     

奶牛OLR1 3′UTR A223C多态的生物学信息分析

[目的]探索氧化型低密度脂蛋白受体OLR1 3′UTR A223C 多态与奶牛乳脂率高低紧密关联的分子机制.[方法]用miRanda(1.0)软件装载牛microRNA数据库,预测OLR1 3′UTR潜在的microRNA.[结果]共预测16个microRNA靶标,OLR1 3′UTR A223C突变定位于bta-miR-370 靶标种子序列的互补区.[结论]由于OLR1 3′UTR A→C突变导致bta-miR-370 靶标的消失,为OLR1 3′UTR A223C 多态与奶牛乳脂率高低紧密关联的分子机制深入研究提供依据.     

BPMPDD对盐酸体系钪、镁、锰和铁的萃取分离

本文研究了1,10-双(1′-苯基-3′-甲基-5′-氧化吡唑-4′-基)癸二酮-[1,10],从盐酸溶液中对钪(Ⅲ)、Mg(Ⅱ)、Mn(Ⅱ)、Fe(Ⅲ、Ⅱ)的萃取分离。     

Synthesis, Characterization and Luminescent Properties of Complexes of Rare Earth Nitrates with 2,2′:4′,4″:2″,2- Quaterpyridine

Ｃｏｏｒｄｉｎａｔｉｏｎｃｏｍｐｌｅｘｅｓｃｏｎｔａｉｎｉｎｇｃｙ ｃｌｏｍｅｔａｌｌａｔｅｄｌｉｇａｎｄｓｈａｖｅｒｅｃｅｎｔｌｙｂｅｅｎｔｈｅｆｏｃｕｓｏｆｉｎｔｅｒｅｓｔｄｕｅｔｏｔｈｅｉｒｕｎｕｓｕａｌｐｈｏｔｏ ｐｈｙｓｉｃａｌａｎｄｅｌｅｃｔｒｏｃｈｅｍｉｃａｌｐｒｏｐｅｒｔｉｅｓ[1 ] .Ｓｏｍｅｏｆｔｈｅｃｏｍｍｏｎｅｓｔｒｅｃｅｎｔｅｘａｍｐｌｅｓａｒｅｂａｓｅｄｏｎｏｌｉｇｏｐｙｒｉｄｉｎｅａｎａｌｏｇｕｅｓ[2 ] .Ｔｈｅｒｅａｒｅａｎｕｍｂｅｒｏｆｒｅａｓｏｎｓｆｏｒｔｈｅｗｉｄｅ…     

Spectroscopic Characterization of Nd-Doped Gadolinium Vanadate Crystals

TheNd3+ dopedgadoliniumvanadateisanewtypeofcrystalwithsuperiorlaserproperties .ItwasfirstpreparedsuccessfullybyscientistsinRussiaandGermany[1] ,thereafter ,inJapan[2 ] ,China[3] ,etc .Alloutgrewcrystalshavebeenverifiedtohaveopticqualityandexcellentlaserproperties .Recently ,BeijingUniversityofTechnologyhasstudiedthecrystaldislocationbythechemicaletchingmethod[4 ] .TheGd VO4 crystalbelongstothetetragonalsystemandhasazirconstructurewith 4 /mmmofpointgroup ,D194h =I4 1/amd (14 1)ofspacegrou…     

Morphological Variation of Eutectic Carbide in Twin-Roll Casting Strip of W9Cr4Mo2

Thetwin rollcastingisthatliquidmetaliscastdirectlyintosteelstripbetweentworotatingrollerscooledbywater[1-6] ,asshowninFig 1.Duetoveryrapidsolidificationspeed ,thelamellarspacingofeu tecticcarbideintwin rollcastinghighspeedsteelstripdecreasesenormouslyincontrasttothatincast inghighspeedsteelbillet[7] .Theeutecticcarbide ,however,stilldistributesincontinuousnetworkongrainboundary[8] ,whichwillleadtothehardnessincreaseofrollcastingstripwiththeresultthatthestripisdifficulttoprocesslater .Moreover …     

Simplified Thermodynamic Model for Pro-Eutectoid Ferrite Formation in Multicomponent Structural Steel

AnumberofthermodynamicmodelsforFe Cbinarysystemhavebeendeveloped ,namelytheKRC′streatment[1] whichbelongstogeometryre pulsivemodel ,theLFG′streatment[2 ] andtheMD′streatment[3 ] whichareofatominteractivemodel .Afterwards,ShifletGJetal[4 ] correctedandim provedthesemodels .Inordertoinvestigatethephasetransformationinmulticomponentsteels ,AaronsonHIetal[5] firstproposedthesuperelementmodelfollowingtheZenerC′sworks[6 ] .Atpresent ,thesuperelementmodelhasbeenwidelyappliedtothermodynamic…     

Calculation Model of Mass Action Concentration for Mg-Al, Sr-Al and Ba-Al Melts and Determination of Their Thermodynamic Parameters

Basedonthermodynamicpropertiesofdifferentkindsofmetallicmelts[1 5] ,ageneralunderstandingofcoexistencetheoryforstructureofmetallicmeltscanbeachieved .ThispaperaimsatdeterminationofthermodynamicparametersofMg Al,Sr AlandBa Almetallicmeltsbycalculationwithmassactionconcentrationsmodel.Therearesomeresearchworksaboutthephasediagramofthesebinarysys tems[6 ,7] ,dataofactivityinthesemelts[8 13 ] aswellasthethermodynamicparametersofSr AlandBa Almelts[12 ,13 ] .Thesedataareusedtobuildcalculationmod…     

TbCo／Cr Amorphous Film with Perpendicular Magneto-Anisotropy

Amorphousrareearth transitionmetalalloy (RE TM)films[1] havebeenintensivelystudied .Sincetheamorphousfilmsoftenpossessaverylargeuniaxialanisotropywithitseasyaxisperpendiculartothefilmplane ,theycanbeusedasmagneto optical[2 ] orhy bridrecordingmedia[3] .Amongthosefilms ,Tb Cofilmsareofgreatinterestbecauseoftheirhighcoer civeforce ,largeperpendicularanisotropyandeasycontroloftheirsaturationmagnetizationthroughcom positionadjustment[4 ] .However ,theTb Cofilmshavesuchadisadvantagethatsubstrate…     

Synthesis,Characterization and Luminescent Properties of Complexes of Rare Earth Nitrates with Tris{2-[N-(pyridine-methanoyl)amino]ethyl} amine

Duringthelastdecade ,thedesignandsynthesisoftripodalligandsandtheirmetalcomplexeshaveattractedconsiderableattentionduetotheirpotentialusesaslumi nescentprobesinmedicineandbiochemistry[1～ 7] ,ascatalysts[8] andelectrochemicalmaterials[9] .However ,thecomplexesofrareearthmetalwithtripodalligandshavefewreported[10 ] .Asanextensionofourstudiesoncomplexesofmetalwithtripodalligands ,anewtripodalligand (tris { 2 [N (pyridine methanoyl)amino]ethyl}amine ,L)anditscomplexeswithrareearthnitratesweresyn…     

Hydrothermal Synthesis and Crystal Structure of a New Dimeric Lanthanum （Ⅲ） Complex

Recently ,considerableefforthasbeenfocusedonrareeartharomaticcarboxylatecomplexesduetotheirfascinatingstructuraldiversities ,variouscoordinationmodesandpromisingfunctionalproperties[1～ 3] .Car boxylateanionshaveversatilecoordinationmodesandthelanthanideionsarewellknownforthevariableco ordinationnumberfrom 3to 12 [4 ] ,whichhavebeenutilizedinpreparingpolymerwithone ,two ,andthree dimensionalstructures[5～ 7] .Althoughmanycomplexeswithbenzoateortheirderivativeshavebeenreported[8～ 11] ,theywere…     

Conductivity of K_(10)H_3[Dy(SiW_4Mo_7O_(39))_2] Treated by Chemistry-Heated Diffusion of Sm and Gd Permeation

Inthelastfewyears ,theapplicationsofpolyox ometalates (POMs)havereceivedmuchattention[1～ 3]fortheiruniquestructuresandproperties ,however ,thepreparationofthemareallofsolid solidorliquid liquidreactions[1] .Fromtheknowledgeoffundamen taltheory ,wethinkthatrareearthelementscanbepermeatedintoPMOsthroughthesolid gasinterfacereaction ,andtoourknowledgethiskindofexperi menthasnotbeencarriedoutuntilnow .Inthispaper ,thechemistry heateddiffusedperme ationmethod[4 ] wasusedtotreatK10 H3[Dy(SiW4 M…     

Mid-Temperature Synthesis of CeO2-TiO2 Complex Compound and Its XRD Structure Study

TiO2 andCeO2 aresemiconductormaterials .TiO2hasthepropertiesofphoto catalysis[1] whileCeO2 hastheabilityofoxygenstorageandcanpromotethedispersionofprecionsmetalsonthesupporter[2 ] .CeO2 TiO2 com plexcompoundwasusedascatalystandspecialfunction almaterial[3～ 5] .ThetraditionalsynthesisofCeO2 TiO2complexcompoundisbyceramicmethodthatusesoxidesasrawmaterialsanditiscalcinedabove 130 0℃[6～ 8] .However ,thestructureandmicrostructureofthecomplexcompoundarenotsuitableforcatalystandfunctionalm…