简介：TheepoxidationofallylchloridewithH2O2onTi-ZSM-5preparedbyisomorphoussubstitutionofHZSM-5withTiCl4gaswasstudied.TheresultsshowthatTi-ZSM-5hasahighcatalyticefficiencyfortheepoxidationofallylchloride.TheH2O2utilizationreaches99.50%whentheallylchloride/H2O2molarratiois>1.Theeffectofsolventspecies,catalystconcentration,H2O2andallylchlorideconcentrationandreactiontemperatureontheepoxidationwasinvestigatedsimultaneously.Itisfoundthatmethanolisthebestsolventforthereaction.Thereactionrateequationwithv=k[Cat.][H2O2]1/2-[C3H5Cl]andtheapparentactivationenergywithEa=63.462kJ/molareobtainedaccordingtothekineticsstudy.
简介：利用线性伏安法和恒电流电解法研究了苯酚在Ti／PbO2电极上的电催化氧化反应，通过电氧化过程中反应物和中间物的高效液相色谱测定，研究了苯酚在Ti／PbO2电极上电催化氧化的反应机理．实验发现，Ti／PbO2电极对水溶液中苯酚的电氧化具有显著的催化作用，25℃时，对初始浓度为2mmol／L的苯酚水溶液，恒定电流密度为50mA／cm2，电解3h，苯酚转化率为98．02％，有机碳去除率为54．36％．苯酚在Ti／PbO2电极上电催化氧化要经过对苯二酚或邻苯二酚、对苯醌、反丁烯二酸和草酸，最终变成二氧化碳和水的历程．第一步反应苯酚转化的主产物是对苯二酚．对苯二酚转化为苯醌和苯醌转化为反丁烯二酸的反应为慢反应，反丁烯二酸转化为草酸的反应为快反应．
简介：Li4Ti5O12（LTO）/carbonnanotubes（CNTs）compositematerialissynthesizedbasedonasolid-statemethodbysand-milling,spray-dryingandcalciningat8508CunderN2flow.TheLTO/CNTssampleswith1wt%and3wt%weightratioofCNTsadditionandthepristineLTOsampleareprepared.TherateperformanceandthethermalstabilityofthesesamplesareinvestigatedbasedonLiMn2O4（LMO）/LTOfull-cell.TheresultsshowthattheweightratioofCNTsadditionhasdistincteffectonLTOperformances.ThecompositematerialsofLTOcompositedCNTshavebetterperformanceathigh-rateduetotheintercalationenhancementbyconductivenetworkofCNTs.Atsecond,theoverchargingtemperatureresponseofthecell’ssurfacewith1wt%CNTsadditionisthelowest.Theparticlesizedistributionismeasuredandthemostuniformparticlesareobtainedwith1wt%CNTsaddition.ThistrendcouldexplainthatthemediumquantityofCNTsisoptimaltoimprovetheheatandmasstransferandpreventtheproblemsofcrystallitegrowinginterferenceandaggregationduringthecalcinationprocess.
简介：有一双chelatingaminotropone的Ti建筑群的合成和结构[在上]ligand被报导了。功能的理论(DFT)学习的密度的计算建议当与methylaluminoxane(毛)激活时，二度(aminotropone)Ti建筑群为olefinic单体的聚合有高潜力。这些理论研究也证明活跃种类通常从二度(aminotropone)导出Ti催化剂与用二度(phenoxyimine)生产的那些相比拥有更高的electrophilicity自然作为高效石蜡聚合催化剂被知道的Ti建筑群(TiFI催化剂)。二度(aminotropone)Ti催化剂产生比TiFI有更高的electrophilicity的催化地活跃的种催化剂。
简介：基于Mg的氢存储合金MgNi，Mg0.9Ti0.1Ni，和Mg0.9Ti0.06Zr0.04Ni成功地借助于机械alloying(麻省)被准备。结构和这些基于Mg的材料的电气化学的特征被学习。X光检查衍射(XRD)结果证明合金的主要阶段展出非结晶的结构。扫描电子显微镜学(SEM)相片证明Ti和Zr的粒子尺寸代替了合金是在直径的大约24m。合金的周期生活被增加Ti和Zr延长。在50个费用分泌物周期以后，Mg0.9Ti0.06Zr0.04Ni的分泌物能力比MgNi合金的高是91.74%并且37.96%比Mg0.9Ti0.1Ni的高合金。为电极能力腐烂的主要原因是Mg的形成(哦)2(Mg腐蚀的产品)在合金的表面。potentiodynamic极化结果显示做的Ti和Zr在一个碱的答案改进耐蚀。电气化学的阻抗光谱学(EIS)结果建议做的Ti和Zr的那合适的数量显著地改进电气化学的催化活动。
简介：Twonewdicyanamidecoordinationpolymers,{Mn(dmpz)[N(CN)2]2}2(1)and{Cu(dmpz)[N(CN)2]2}2(2)(dmpz=3,5-dimethylpyrazole),weresynthesizedandcharacterizedbysinglecrystalX-raydiffractionanalysisandIRspectroscopy.In1and2themetalionshavetwodifferentcoordinationmodes,whereoneiscoordinatedtofourdicyanamideanionsandtwomonodentatedmpzmoleculestoformaslightlydistortedoctahedralgeometry,whiletheotheradoptsoctahedralgeometry,surroundedbyfournitrileNatomsandtwoamideNatomsofthedicyanamideanions.Bothcomplexescontaintwoalternatingchainsthatareparalleltoeachother.
简介：ThecrystalstructureofDi-nitratobis（ethylcaprolactam）uranyl（Ⅱ）UO2[CH2（CH2）4CONC2H5]2（NO3）2wasestablishedbyasingle-crystalX-raydiffractionstudy.Itistriclinie,spacegroupP1,witha=7.171（2）,b=8.655（3）,c=10.182（5）A,α=78.27（3）,β=70.63（3）,γ=81.76（3）°,V=581.7（4）A3,Z=l,Dc=1.94g.cm-3.FinalRvalueis0.0218.Theresultrevealsthaturanylioniscoordinatedtosixoxygenatoms,twoofthemarefromtwocarbonylgroupsofethylcaprolactamandtheotherfourarefromtwonitrategroups.
简介：建立了电感耦合等离子体发射光谱法测定镍铬合金中Si，Mn，Fe，Ti，A1，Cu元素含量的分析方法。确定了溶样方法和分析谱线，采用基体匹配消除干扰。对方法精密度和准确度进行实验，实验结果表明，各元素的相对标准偏差均小于3％，加标回收率在86.8％～106.9％，镍铬合金标准物质的各元素测定结果均与标准值一致。所建立的方法快速、准确，适用于镍铬合金中多元素同时测定。
简介： Enantioimericallypure1,l'-bi-2-naphthol(BINOL)1anditsderivativesareimportantchiralligandsandauxiliariesforanumberofasymmetrictransformations1suchasaldolcondensations,alkylations,Diels-Alderreactions,Michaeladditions,epoxidations,etc.Opticallypure1andtheirderivativeshavealsobeenusedextensivelyinchiralrecognition,chiralseparationandintheconstructionoffunctionalisedmaterials2.Furthermore,(R)-and(S)-BINOLarealsofundamentalstartingmaterialsforthesynthesisofalargevarietyofotherchiralbinaphthylssuchasMOP(2c),NOBIN(2d)andBINAP(2e).Asaresultthedevelopmentofefficientandeconomicmethodsforthepreparationofopticallypure1hasattractedmuchattentioninrecentyears3andnovelmethodsfortheresolutionof(±)-1continuetobedeveloped.……
简介：Themononuclearcomplex,[NtCl2(trzCHzCHzCOPh)4]·6H2O(trz=1,2,4-triazole),wassynthesizedanditsstructurewasdeterminedbysinglecrystalX-raydetermination.Itcrystallizesinthemonoclinicsystem,spacegroupP21/c,withlatticepa-rameters:a=0.80391(2)nm,b=1.06215(2)nm,c=2.90133(2)nm,β=94.792(1)°andZ=2.EachnickelatomiscoordinatedbyfourNatomsoftriazolefromfourβ-(1,2,4-IriHole-1-yl)propiophenoneligandsandtwochlorideanionsinarrangementwithoctahedralcoordinationgeometry.Inadditiontothecoordinatingnickelcomplex,therearesixunco-ordinatedwatermolecules.TheNi—Ndistanceis0.24865(8)nmandtheNi—Ndistaneesareintherangeof0.2072(2)to0.2099(2)nm,respectively.Inthesolidstate,theUtiecom-poundformsthreedimensionalnetworkstructurethroughhy-drogenbonds.Theintermolecularhydrogenbondsconnectthe[NiCl2(C2H2N3CH2CH2COPh)4]andH2Omoieties.Thedeepgreencrystalswerealsoexaminedbyelementalanalysis,FT-IRandUVspectra,whichareinagreementwiththestructuralda-ta.
简介：AsimplespectrophotometricassayofH2O2andglucoseusingAgnanoparticleshasbeencarriedout.RelyingonthesynergisticeffectofH2O2reductionandultraviolet(UV)irradiation,Agnanoparticleswithenhancedabsorptionsignalsweresynthesized.H2O2servedasareducingagentintheAgnanoparticlesformationinwhichAg+wasreducedtoAg0byO2àgeneratedviathedecompositionofH2O2inalkalinemedia.Ontheotherhand,photoreductionofAg+toAg0underUVirradiationsalsocontributedtothenanoparticlesformation.ThesynthesizednanoparticleswerecharacterizedbyTEM,XPS,andXRD.TheproposedmethodcoulddetermineH2O2withconcentrationsrangingfrom5.010à7to6.010à5mol/L.Thedetectionlimitwasestimatedtobe2.010à7mol/L.SincetheconversionofglucosetogluconicacidcatalyzedbyglucoseoxidasewascompaniedwiththeformationofH2O2,thesensingprotocolhasbeensuccessfullyutilizedforthedeterminationofglucoseinhumanbloodsamples.Theresultswereingoodagreementwiththosedeterminedbyalocalhospital.Thiscolorimetricsensorthusholdsgreatpromisesinclinicalapplications.
简介：Thecopper(Ⅱ）complex[Cu3(nta)2(azpy)2(H2O2)]·6H2O(nta=nitrilotriacetate,azpy=4,4′-azobispyridine)hasbeensynthesizedandcharacterized.TheX-rayanalysisrevealsthattherearetwokindsofcopper(Ⅱ）coordinationenvironments.Cu(1)hasadistortedsquareplanesymmetryandCu(2)hasadistortedoctahedralsymmetry.Cu(1)islinkedtoCu(2)throughntaandboundtoCu(1C)byazpy,andCu(2)islinkedtoCu(2A)throughazpy,whichextendstotwo-dimensionalnetworkwithlargerhombus1.2nm×1.7nm.
简介：The2-Dheteronuclearcoordinationpolymer{[Ag4Fe2(SCN)12(H2O)2][(inaH)2(H2O)2]}n(1)(inaHistheabbreviationofprotonatedisonicotinicacid)withchemicalformulaC24H20Ag4Fe2N14O8S12hasbeensynthesizedandcharacterizedbysinglecrystalX-raydiffraction,elementalanalysisandIRspectroscopy.TheAgES2ringsconnecttwokindsofoctahedralgeometriesofFe(Ⅲ)ions,[Fe(NCS)6]^3-and[Fe(H2O)E(NCS)4]^-unitswithbridgingthiocyanateionsleadingto2-D[Ag4Fe2(SCN)12(H2O)2]^2-anionframework.Fourkindsofringsincludingtheunprecedentedthirty-twomemberedAg4Fe4(SCN)8ringssharecomersoredgesinthe2-Danionlayerstructure.AllthiocyanatescoordinatetothemetalionsaccordingtotheHSABprinciplewithNatomsbindingtotheFe(Ⅲ)ionsandwithSatomsbindingtoAg(I)ions.Pronoatedinacationsstabilizethelayerstructureascounterionsandhydrogenbondswereformedwithinthepronoatedinacationsdimerandbetweenthedimersandthelatticewaters.Crystaldata:Mr=1560.44,triclinic,P-↑1,a=0.76082(1)nm,b=0.9234nm,c=1.85611(4)nm,α=103.0170(10)°,β=93.7780(10)°,γ=97.4080(10)°,V=1.25385(3)nm^3,Z=1,μ(MoKα)=2.650mm^-1,Dc=2.067g·cm^-3,F(000)=758,R1=0.0412,wR2=0.1003.
简介：SodiumdithioniteinitiatedsulfinatodehalogenationofBrCF2CF2Risstudied.
简介：Thecanonicalandlocatizedmolecutarorbitersof[NCCuS2NoS2]2-clusterwerecalculatedbymeansofCNDOquantumchemistrymethod.Thentheenergyandpropertiesofcorrespondingchemicatbondswerediscussed,especially,Cu-Sb-NothreecenterconjugatedπbondsandNo-St-Noconjugatedπbondswereaccountedfor.
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![Two New Dicyanamide Coordination Polymers with Alternating Parallel Chains： {Mn（dmpz）[N（CN）<b style='color:red'>2</b>]<b style='color:red'>2</b>}<b style='color:red'>2</b> and {Cu（dmpz）[N（CN）<b style='color:red'>2</b>]<b style='color:red'>2</b>}<b style='color:red'>2</b>](/image/thesis8 "Two New Dicyanamide Coordination Polymers with Alternating Parallel Chains： {Mn（dmpz）[N（CN）<b style='color:red'>2</b>]<b style='color:red'>2</b>}<b style='color:red'>2</b> and {Cu（dmpz）[N（CN）<b style='color:red'>2</b>]<b style='color:red'>2</b>}<b style='color:red'>2</b>")
![CRYSTAL STRUCTURE OF DI - NITRATOBIS（ETHYLCAPROLACTAM）URANYL（Ⅱ） UO<b style='color:red'>2</b>[CH<b style='color:red'>2</b>（CH<b style='color:red'>2</b>）4CONC<b style='color:red'>2</b>H5]<b style='color:red'>2</b>（NO3）<b style='color:red'>2</b>](/image/thesis10 "CRYSTAL STRUCTURE OF DI - NITRATOBIS（ETHYLCAPROLACTAM）URANYL（Ⅱ） UO<b style='color:red'>2</b>[CH<b style='color:red'>2</b>（CH<b style='color:red'>2</b>）4CONC<b style='color:red'>2</b>H5]<b style='color:red'>2</b>（NO3）<b style='color:red'>2</b>")
![Structure of Tetra[β-（1,<b style='color:red'>2</b>,4-triazole-l-yl） propiophenone ] Dichloro NiCkel（Ⅱ） Solvate Hexahydrate Complex：[NiCl<b style='color:red'>2</b> （ C<b style='color:red'>2</b>H<b style='color:red'>2</b>N3CH<b style='color:red'>2</b>CH<b style='color:red'>2</b>-COPh） 4 ]·6H<b style='color:red'>2</b>O](/image/thesis14 "Structure of Tetra[β-（1,<b style='color:red'>2</b>,4-triazole-l-yl） propiophenone ] Dichloro NiCkel（Ⅱ） Solvate Hexahydrate Complex：[NiCl<b style='color:red'>2</b> （ C<b style='color:red'>2</b>H<b style='color:red'>2</b>N3CH<b style='color:red'>2</b>CH<b style='color:red'>2</b>-COPh） 4 ]·6H<b style='color:red'>2</b>O")
![Synthesis,Structure and Characterization of Two—dimensional Network Copper Complex [Cu3（nta）<b style='color:red'>2</b>（azpy）<b style='color:red'>2</b>（H<b style='color:red'>2</b>O）<b style='color:red'>2</b>]·6H<b style='color:red'>2</b>O](/image/thesis16 "Synthesis,Structure and Characterization of Two—dimensional Network Copper Complex [Cu3（nta）<b style='color:red'>2</b>（azpy）<b style='color:red'>2</b>（H<b style='color:red'>2</b>O）<b style='color:red'>2</b>]·6H<b style='color:red'>2</b>O")
![Synthesis and Crystal Structure of a Two-dimensional Silver（Ⅰ）-Iron（Ⅲ） Heteronuclear Coordination Polymer： {[Ag4Fe<b style='color:red'>2</b>（SCN）12（H<b style='color:red'>2</b>O）<b style='color:red'>2</b>] [（inaH）<b style='color:red'>2</b>（H<b style='color:red'>2</b>O）<b style='color:red'>2</b>]}n](/image/thesis17 "Synthesis and Crystal Structure of a Two-dimensional Silver（Ⅰ）-Iron（Ⅲ） Heteronuclear Coordination Polymer： {[Ag4Fe<b style='color:red'>2</b>（SCN）12（H<b style='color:red'>2</b>O）<b style='color:red'>2</b>] [（inaH）<b style='color:red'>2</b>（H<b style='color:red'>2</b>O）<b style='color:red'>2</b>]}n")
![LOCALIZED STUDIES ON ELECTRONIC STRUCTURE AND CHEMICAL BOND FOR [NCCuS<b style='color:red'>2</b>MoS<b style='color:red'>2</b>]<b style='color:red'>2</b>- CLUSTER](/image/thesis19 "LOCALIZED STUDIES ON ELECTRONIC STRUCTURE AND CHEMICAL BOND FOR [NCCuS<b style='color:red'>2</b>MoS<b style='color:red'>2</b>]<b style='color:red'>2</b>- CLUSTER")