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IntroductionThediscoveryofthesuperconductivityoftheBa-La-Cu-Osystemathightemperatureshasgreatlystimulatedtheinvestigationofcuprates[1].Cuprateshavebeenfoundtobeactivecatalystsforseveralreactions,includingthereductionanddecompositionofN2O,NOandNO2,the… 相似文献
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Synthesis and Characterization of Zinc Succinate, Zn(C4H4O4) 总被引:3,自引:0,他引:3
ZHENG Yue qing ** 《高等学校化学研究》2001,17(1):20-25
Introduction Succinateion (C4H4O4) 2 -(—OOCCH2 CH2 COO— )isaversatileligandsinceeachofthefourterminalcarboxyloxygensisabletoparticipateincoordinationtocentralmetalatom(s)inadditiontotheflexibilityoftheC—Cbone .Suchcoordinatingversatilityhasbeenreflectedinseve… 相似文献
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1 INTRODUCTIONWehaveshownaninterestinexopolyhedralcyclizationofmetalligandstocluster.AseriesofmetallaboranecompoundscontainingfivememberedringssuchasM-O-C-O-BandM-S-C-O-Baresynthesizedandcharacterized.Thegroupsofcyclizationincludeacetate〔1〕,benzoat… 相似文献
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1 INTRODUCTIONMetal organicchemicaldeposition(MOCVD)isanappealingtechniqueforelec tronicapplications.AsoneoftheMOCVDsourcematerialsforYBCOsuperconductorfilms,bis( 2 ,2 ,6,6 tetramethyl 3,5 heptanedionate)bariumhasbeenextensivelyusedinthepast[1~ 3].Thelargesizeofthe… 相似文献
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1 INTRODUCTIONResearchonSHGeffecthasbeenonaremarkablepositioninorganicnonlinearoptical(NLO)materialsfield.Theconjugateddelocalizedπelectronspossiblyresultinthesecond-orderNLOpropertyoforganiccompounds,soanumberofnitroanilinederivatives,suchas2-methyl… 相似文献
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1 INTRODUCTIONRecentyearshavewitnessedamarkedincreaseintheliteratureintheuseofsele niumandtelluriumasbridgingandstabilizingligandssincetheyexhibitunusualstruc turalandreactivitypatterns.〔1〕Ourongoingresearchprogramaimedatexploringnewconvenientsynthetic… 相似文献
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《中国化学快报》1996,(10)
Co ̄ndenceauthor.Oaf((k6<l)adspeciesPeakswerefoundtodisappearat573'K.Duringthetemperatureelevation,theCeOZFZgandO2-Peakswerefoundtobroadenandshifttolowerwavenumbers.ThefhaluencyshiftwilhresecttotemperatureisawellknownphenomenoninRamanspectroscopyofsolidsanditisrelatedtothetherma]expansionoflatticeparameters.At1023'K,theO2-adspecies(at1159cm-l)andCeOZF2,(at449cm-l)peakswerefoundtoremainexistingonthesurfaceofceriumoalde.WhentheOZ-pretreatedCeOZsamplewaswarmedsuccessivelyinaflowofCd,thereachonsofCabwithlaniceo 相似文献
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1 INTRODUCTIONSolid stateboratesexhibitavarietyofphysicalandchemicalfeatures,rangingfromnonlinearopticalpropertiesof β BaB2 O4(β BBO) [1 ] tothecatalyticactivityofCu2 Al6B4O1 7[2 ] ,whichhaveattractedgreatattentionofmanyscientificresearchers.Aspartofourefforttosynt… 相似文献
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Synthesis and characterization of thermally crosslinked polyimide with second-order nonlinear optical chromophore 总被引:2,自引:0,他引:2
Incomparisonwithinorganicnonlinearoptic(NLO)materials,organicpolymericNLOmaterialshavemanyadvantages,suchasliablemoleculardesignandoptimization,largernonresonanceNLOcoefficiency,lowerdielectricconstant,goodworkingability,opticaltransparencyandresistancea… 相似文献
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1 INTRODUCTIONOwingtotheirpossibleimportantrolesinlifeprocesses,cubanetypetetranuclearmolybdenumclustershavebeenextensivelyexploredduringthepasttwodecades,ofwhichtheclustercompoundsthatcontain〔Mo4XS3〕(X=SorO)corehaveattractedspecialattention〔17〕.Asp… 相似文献
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IntroductionYttriumtantalatescanexistinfourformsYTaO4,YTa7O19,Y3TaO7andYTa3O9,amongwhichyttriumorthotantalatehasrecievedmoreattention.RareearthorthotantalatesareakindofpromisinghostmaterialsfornewX-rayphosphorssincetheycontainelementsofhighatomicnumb… 相似文献
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Horseradishperoxidase(HRP)canstronglycatalyzethereactionofH2O2oxidizingophenylenediamine(OPD),thechromaticproductofwhichcanbedetectedinenzymelinkedimmunosorbentassay(ELISA)withspectrophotometry[1].Involtammetricenzymelinkedimmunoassay[2—4],OPDH2O2HRPsystemhasf… 相似文献
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ZHENG Yue qing * 《高等学校化学研究》1999,(3)
IntroductionPreviously,wereportedthecrystalstructureofK2[Ni(CO3)2(H2O)4][1],whichcrystallizedinthebaylissitetypestructureandwasfoundtobeisostructuralwithK2[Co(CO3)2(H2O)4][2]andK2Mg(CO3)2·4H2O[3].Inordertosystematicallyinvestigatetheoccurrenceoftheco… 相似文献
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1 INTRODUCTIONCertaincoppercomplexeshavebeenshowntohaveunusualchemicalpropertiessuchasoxygentransfer,oxidativeadditionandhomogenouscatalytichydrogenation[1].Oxidativeadditionreactionsarekeystepsintheactivationofσbondsinagreatnumberofcatalyticprocess.Cop… 相似文献
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1 INTRODUCTIONTheorganicsecondordernonlinearoptical(NLO)materialshavebeenpaidmoreandmoreattentionsbecauseoftheirimportantapplicationsinoptoelectronicstechnologyfields.[1~3]Theirsecondharmonicgeneration(SHG)efficienciesusuallyexceedthoseofcommonlyusedinorg… 相似文献
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1 INTRODUCTIONTransitionmetalclustercomplexeshavebeenreceivingconsiderableattentioninrecent yearslargelybecauseoftheir potentialapplicationsincatalysisaswellasthenoveltyandversatilityoftheirreactionsandstructures.[1~ 4] Ourinterestinmetalclustercatalysisp… 相似文献
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《中国化学快报》1995,(7)
STUDYONSYNTHESIS,CHARACTERIZATIONANDCATALYSISOFPILLAREDANIONCLAY(Ⅲ)──SYNTHESISOFZnAl-BW_(11)O_(39)Z(H_2)~(n-)ThanksforthesupportofFoundationofCECandtheopenlabofHydrothermalSynthesisinJinnUniversityeddifferentkindsoftriheteropolyoxometalate(TH'POMs)totheZnAIlayeredclays,usingtheesterificationofn-butylalcoholandaceticacidasprobereaction.andfoundthatthepillaredcompoundsweremoreactiveandselectivethanthesolidacidcatalystssuchasacidicion-exchangeresinsl4].Onthebasisofpreviouswork.wenowencapsulatetriheteropolyoxome 相似文献
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1INTRODUCTIONOctacarbonyldicobaltisaveryconvenientstartingmaterialforthepreparationofalmostanycobaltcompound〔1〕.Thereactionso... 相似文献