简介：Anewcompoundbasedonpolyoxovanadate[{Ni(en)2}2Sb8V14O42]·5.5H2O(en=ethylenediamine)(1)wassynthesisedhydrothermallyasblackrhombuscrystals.Compound1crystallizedinthemonoclinicsystemwithspacegroupP21/n,Z=4,a=1.46953(9)nm,b=1.28623(8)nm,c=1.76008(11)nm,β=105.7230(10)°.Intheasymmetricunit,cluster{Sb8V14O42}canbeconsideredasanSbderivativeofthe{V18O42}unit.Each{Sb8V14O42}clusterasabuildingblockinterconnectedtofourotherneighboringunitsby{Ni(en)2}bridginggroupswhicharelinkedthroughtheterminaloxygenatomsofthepolyoxoanions,formingatwodimensionalnetwork.
简介：Twooxo-vanadium(IV)complexes,[VO(C2O4)(2,2′-bipy)(H2O)]·C2H5OH(1)andVO(C2O4)(phen)(H2O)(2),where2,2′-bipy=2,2′-bipyridyl,phen=1,10-phenanthroline,weresynthesizedaspotentialfunctionalmodelsofvanadiumhaloperoxidases(VHPOs)inmixedsolventofethanolandwateratroomtemperature.Thecomplexeswerecharacterizedbyelementalanalysis,infrared(IR),UV-VisandX-raycrystallography.Structuralanalysesshowedthatvanadiumatomwascoordinatedbyaterminaloxygen,oneoxygenatomfromcoordinatedwater,twooxygenatomsfromthecarboxylategroupofoxalicacid,andtwonitrogenatoms(N1andN2)from2,2′-bipy/phen.Centralvanadiumatomsincomplexes1and2werebothinadistorted-octahedralenvironment,andsomeintermolecularhydrogenbondinglinkageswerealsoobservedineachcomplex.BrominationreactionactivityofthetwocomplexeswasevaluatedwithphenolredasorganicsubstrateinthepresenceofH2O2,Br-andphosphatebuffer,indicatingthattheycanbeconsideredasapotentialfunctionalmodelofVHPO.Inaddition,thermalanalysiswasalsoperformedanddiscussedindetail.
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：Thesolidaddofthefirstprotonatedzincoborophosphate,(H3O)Zn(H2O)2BP2O8·H2O(1),wassoventothermallysyn-thesizedbythereactionofZn(NO3)2·6H2OandH3BO3withH3PO4inamixedsolvent,andstructurallycharacterizedbysingle-ystalX-raydiffractionanalysis.ItcrystallizesinthehexagonalP6122,a=0.9604(4)nm,c=1.5297(6)nm,V=1.2218(8)nm^3,Dc=2.921g/cm^3,Z=6,F(000)=1080,μ=3.495mm^-1.Thestmchwefeaturesthatthetetrahedra-te-trahedrahdlcesinterconnectedbyoctahedraandstronghydro-gembondinteractionsformathree-dimensionalframework.Theprotonatedwatermoleculesarelocatedatuniquepositions.othercharacterizationsbyIRandthermalanalysisarealsode-scribed.
简介：ThecomplexK3H4GeW9V3O40·8H2OcrystallizedinamonocliiniesystemwithspacegroupP2,Mr=2784.67,a=11.099（3）,b=16.452（4）,c=13.534（4）,β=108.14°,Z=2,V=2348.493,F（000）:2456,μ=239.7cm-1,De=3.932g/cm3.ThefinalR=0.083for4528non-zeroreflexions.ThestructureofanionsGeW9V3O40andGeW9O34belongstoA--type.
简介：Yb3+complexeswithtwonitrilotriaceticacidmoleculeswerepreparedandtheircompositionsweredeterminedasK3[Yb(nta)2(H2O)]*5H2OandNa3[Yb(nta)2]*6H2Obyelementalanalyses.Theirstructureswerecharacterizedbysingle-crystalX-raydiffractionanalyses.IncomplexK3[Yb(nta)2(H2O)]*5H2O,theYbN2O7partformsanine-coordinatemonocappedsquareantiprismaticstructure.IncomplexNa3[Yb(nta)2]*6H2O,theYbN2O6partformsaneight-coordinatesquareantiprismaticstructure.Itcanbeseenthattheoutercations(K+andNa+)greatlyaffectthecoordinationnumberandcoordinatestructurefromtheseresults.
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：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：利用水热法首次合成了具有两种配位环境Cd原子的新型杂多蓝化合物[NH3（CH2）2NH3]5[Cd（H2O）][CdMo12^vO30（HPO4）6（H2PO4）2]·5H2O．通过元素分析、ICP、TG和X射线单晶衍射确定了其组成，使用IR和EPR进行了结构表征．通过N2吸附脱附测定了比表面积和孔径，为催化研究提供了基础数据．结果表明：该晶体为三斜晶系，P-1，空间群；晶胞参数a=1．2002（2）nm，b=1．4651（3）nm，c=2．1192（4）nm，V=3．5642（12）nm^3，p=83．01（3）°，Z=2，F（000）=2932，R1=0．0300，wR2=0．0716．
简介：Tetrabutylammoniumorpotassiumsaltsoforganometalllicderivativesoflacunarypolyanion(RM)3P2W15O59^n-(RM=CpTi,CpZr,C4H7O2SnorC5H9O2Sn)havebeenpreparedandstructurallycharacterizedbyelementalanalysis,IR,UV-Vis,^1HNMRand^183WNMRspectroscopies.Thetitlecomplexesexhibitantitumoractivityinvitro.
简介：Thecrystalandmolecularstructuresof[(C3H7O)2PS2]2(CCDCNo.217201)weredeterminedbymeansofX-raycrystallography.ItcrystallizedinatriclinicsystemwithspacegroupP1^-andlatticeparametersa=0.82794(3)nm,b=0.84764(2)nm,c=0.85034(3)nm,α=97.78(3)°β=110.77(3)°,γ=94.95(3)°,V=0.54701(9)nm^3,Z=1.Inthismolecule,thetwodiisopropyldithiophosphategroups,[(C3H7O)2PS2]2,whichareparalleltoeachother,arelinkedbyanS--Sbondandthereexistinversioncentersinthemolecule,Inthestructure,theP=Sbondsinthetwodithiophosphateunitsaretrans-orientedtoeachother.
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：Theneworganic-inorganiccompound,[C_6H_7N_2O_2]_3TeCl_5·2Clwassynthesizedanditsstructurewasdeterminedatroomtemperatureinthetriclinicsystem(P~-1)withthefollowingparameters:a=10.5330(11)?,b=10.6663(11)?,c=15.9751(16)?,α=82.090(2)°,β=71.193(2)°,γ=68.284(2)°andZ=2.ThefinalcycleofrefinementledtoR=0.057andRw=0.149.ThecrystalstructurewasstabilizedbyanextensivenetworkofN--H···Clandnon-classicalC--H···Clhydrogenbondsbetweenthecationandtheanionicgroup.Severalthermalanalysistechniquessuchasthermogravimetricanalysis,differentialscanningcalorimetricanalysisandevolvedgasanalysiswereused.Weusedisoconversionalkineticsmethodstodeterminethekineticsparameters.Weobservethatthedecompositionof[C_6H_7N_2O_2]_3TeCl_5·2Clentailstheformationhydrochloricacidofnitroanilineasvolatiles.Theinfraredspectrawererecordedinthe4000–400cm~(-1)frequencyregion.TheRamanspectrawererecordedintheexternalregionoftheanionicsublatticevibration50–1500cm~(-1).TheopticalbandgapwascalculatedfromtheUV-VisabsorbancespectrausingclassicalTaucrelationwhichwasfoundtobe3.12and3.67eV.
客服QQ：30444492琼网文【2021】1550-113号
增值电信业务经营许可证：琼B2-20210322
出版物经营许可证：新出发龙华出字第(2021)009号
广播电视节目制作经营许可证：(琼)字第00779号
版权所有 ©2002-2024 期刊网(www.qikanchina.com) 琼ICP备2021005105号
![Hydrothermal Synthesis and Crystal Structure of a New <b style='color:red'>2</b>D Layer Compound [{Ni（en）<b style='color:red'>2</b>}<b style='color:red'>2</b>Sb8<b style='color:red'>V</b>14<b style='color:red'>O</b>42]·5.5H<b style='color:red'>2</b><b style='color:red'>O</b>](/image/thesis1 "Hydrothermal Synthesis and Crystal Structure of a New <b style='color:red'>2</b>D Layer Compound [{Ni（en）<b style='color:red'>2</b>}<b style='color:red'>2</b>Sb8<b style='color:red'>V</b>14<b style='color:red'>O</b>42]·5.5H<b style='color:red'>2</b><b style='color:red'>O</b>")
![Vanadium Haloperoxidases Model Compounds： Synthesis, Structural Characterization and Mimic Catalytic Bromination Activity of [VO（C_<b style='color:red'>2</b><b style='color:red'>O</b>_4）（<b style='color:red'>2</b>,<b style='color:red'>2</b>′-bipy）（H_<b style='color:red'>2</b><b style='color:red'>O</b>）]·C_<b style='color:red'>2</b>H_<b style='color:red'>5</b>OH and VO（C_<b style='color:red'>2</b><b style='color:red'>O</b>_4）（phen）（H_<b style='color:red'>2</b><b style='color:red'>O</b>）](/image/thesis2 "Vanadium Haloperoxidases Model Compounds： Synthesis, Structural Characterization and Mimic Catalytic Bromination Activity of [VO（C_<b style='color:red'>2</b><b style='color:red'>O</b>_4）（<b style='color:red'>2</b>,<b style='color:red'>2</b>′-bipy）（H_<b style='color:red'>2</b><b style='color:red'>O</b>）]·C_<b style='color:red'>2</b>H_<b style='color:red'>5</b>OH and VO（C_<b style='color:red'>2</b><b style='color:red'>O</b>_4）（phen）（H_<b style='color:red'>2</b><b style='color:red'>O</b>）")
![Syntheses and Structural Researches of Yb^3＋ Complexes with Nitrilotriacetic Acids—Nine—coordinate K3[Yb（nta）<b style='color:red'>2</b>（H<b style='color:red'>2</b><b style='color:red'>O</b>）]·<b style='color:red'>5</b>H<b style='color:red'>2</b><b style='color:red'>O</b> and Eight—coordinate Na3[Yb（nta）<b style='color:red'>2</b>]·6H<b style='color:red'>2</b><b style='color:red'>O</b> complexes](/image/thesis8 "Syntheses and Structural Researches of Yb^3＋ Complexes with Nitrilotriacetic Acids—Nine—coordinate K3[Yb（nta）<b style='color:red'>2</b>（H<b style='color:red'>2</b><b style='color:red'>O</b>）]·<b style='color:red'>5</b>H<b style='color:red'>2</b><b style='color:red'>O</b> and Eight—coordinate Na3[Yb（nta）<b style='color:red'>2</b>]·6H<b style='color:red'>2</b><b style='color:red'>O</b> complexes")
![Syntheses, Crystal Structures and Characterization of Two Zeotype Crystals of K4[Cr30（H<b style='color:red'>2</b><b style='color:red'>O</b>） 3（OOCH） 6] <b style='color:red'>2</b>[ P<b style='color:red'>2</b>W18<b style='color:red'>O</b>62]· 9.5H<b style='color:red'>2</b> <b style='color:red'>O</b> and K4[ Cr3<b style='color:red'>O</b>（ H<b style='color:red'>2</b><b style='color:red'>O</b>）3（ OOCH）6 ]<b style='color:red'>2</b>[ H3 P<b style='color:red'>2</b> W17Co（H<b style='color:red'>2</b><b style='color:red'>O</b>） <b style='color:red'>O</b>61]· 20H<b style='color:red'>2</b><b style='color:red'>O</b>](/image/thesis10 "Syntheses, Crystal Structures and Characterization of Two Zeotype Crystals of K4[Cr30（H<b style='color:red'>2</b><b style='color:red'>O</b>） 3（OOCH） 6] <b style='color:red'>2</b>[ P<b style='color:red'>2</b>W18<b style='color:red'>O</b>62]· 9.5H<b style='color:red'>2</b> <b style='color:red'>O</b> and K4[ Cr3<b style='color:red'>O</b>（ H<b style='color:red'>2</b><b style='color:red'>O</b>）3（ OOCH）6 ]<b style='color:red'>2</b>[ H3 P<b style='color:red'>2</b> W17Co（H<b style='color:red'>2</b><b style='color:red'>O</b>） <b style='color:red'>O</b>61]· 20H<b style='color:red'>2</b><b style='color:red'>O</b>")
![新型杂多蓝化合物[NH3（CH<b style='color:red'>2</b>）<b style='color:red'>2</b>NH3]<b style='color:red'>5</b>[Cd（H<b style='color:red'>2</b><b style='color:red'>O</b>）][CdMo12^VO30（HPO4）6（H<b style='color:red'>2</b>PO4）<b style='color:red'>2</b>]·<b style='color:red'>5</b>H<b style='color:red'>2</b><b style='color:red'>O</b>的合成与晶体结构](/image/thesis12 "新型杂多蓝化合物[NH3（CH<b style='color:red'>2</b>）<b style='color:red'>2</b>NH3]<b style='color:red'>5</b>[Cd（H<b style='color:red'>2</b><b style='color:red'>O</b>）][CdMo12^VO30（HPO4）6（H<b style='color:red'>2</b>PO4）<b style='color:red'>2</b>]·<b style='color:red'>5</b>H<b style='color:red'>2</b><b style='color:red'>O</b>的合成与晶体结构")
![Crystal Structure and Bioactivity of Complex [Gd（C10H9N<b style='color:red'>2</b><b style='color:red'>O</b>4）（C10H8N<b style='color:red'>2</b><b style='color:red'>O</b>4）（H<b style='color:red'>2</b><b style='color:red'>O</b>）3]<b style='color:red'>2</b>·phen·4H<b style='color:red'>2</b><b style='color:red'>O</b>](/image/thesis13 "Crystal Structure and Bioactivity of Complex [Gd（C10H9N<b style='color:red'>2</b><b style='color:red'>O</b>4）（C10H8N<b style='color:red'>2</b><b style='color:red'>O</b>4）（H<b style='color:red'>2</b><b style='color:red'>O</b>）3]<b style='color:red'>2</b>·phen·4H<b style='color:red'>2</b><b style='color:red'>O</b>")
![Crystal Structure of Bis （0, <b style='color:red'>O</b>＇-diisopropyl dithiophosphate） ： [（C3H7<b style='color:red'>O</b>）<b style='color:red'>2</b>PS<b style='color:red'>2</b>]<b style='color:red'>2</b>](/image/thesis16 "Crystal Structure of Bis （0, <b style='color:red'>O</b>＇-diisopropyl dithiophosphate） ： [（C3H7<b style='color:red'>O</b>）<b style='color:red'>2</b>PS<b style='color:red'>2</b>]<b style='color:red'>2</b>")
![配合物{[Co（<b style='color:red'>5</b>-氨基-8-羟基喹啉）_<b style='color:red'>2</b>]·H_<b style='color:red'>2</b><b style='color:red'>O</b>}_n的合成及结构研究](/image/thesis17 "配合物{[Co（<b style='color:red'>5</b>-氨基-8-羟基喹啉）_<b style='color:red'>2</b>]·H_<b style='color:red'>2</b><b style='color:red'>O</b>}_n的合成及结构研究")
![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><b style='color:red'>O</b>）<b style='color:red'>2</b>]·6H<b style='color:red'>2</b><b style='color:red'>O</b>](/image/thesis18 "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><b style='color:red'>O</b>）<b style='color:red'>2</b>]·6H<b style='color:red'>2</b><b style='color:red'>O</b>")
![Synthesis, structural study, thermal, optical properties and characterization of the new compound [C6H7N<b style='color:red'>2</b><b style='color:red'>O</b><b style='color:red'>2</b>]3TeCl<b style='color:red'>5</b>·<b style='color:red'>2</b>Cl](/image/thesis19 "Synthesis, structural study, thermal, optical properties and characterization of the new compound [C6H7N<b style='color:red'>2</b><b style='color:red'>O</b><b style='color:red'>2</b>]3TeCl<b style='color:red'>5</b>·<b style='color:red'>2</b>Cl")