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1.
时茜  王尧宇 《结构化学》1999,18(2):94-97
1INTRODUCTIONCoppercomplexeshavealargevarietyofstericstructuresandplayanimportantroleincatalysingtheenzymaticactivities,which...  相似文献   

2.
IntroductionYttriumtantalatescanexistinfourformsYTaO4,YTa7O19,Y3TaO7andYTa3O9,amongwhichyttriumorthotantalatehasrecievedmoreattention.RareearthorthotantalatesareakindofpromisinghostmaterialsfornewX-rayphosphorssincetheycontainelementsofhighatomicnumb…  相似文献   

3.
InvestigationofComputerizedDynamicOscillographicAnalysisInvestigationofComputerizedDynamicOscillographicAnalysis¥HongQI;PengL...  相似文献   

4.
1 INTRODUCTIONCurrently,consistenteffortshavebeenmadetotheinvestigationoforganicnonlinearoptical(NLO)materials〔1〕.Someofcinnamylideneacetophenonederivativeshavefairlystrongsecondharmonicgeneration(SHG)andthereforearepotentialusefulinNLOfields.Durin…  相似文献   

5.
1INTRODUCTION1,5 benzothiazepinesposespotentialbiologicalactivities〔1〕.CycloadditionreactionsattheirC=Ndoublebondhavearousedc...  相似文献   

6.
1 INTRODUCTIONSolid stateboratesexhibitavarietyofphysicalandchemicalfeatures,rangingfromnonlinearopticalpropertiesof β BaB2 O4(β BBO) [1 ] tothecatalyticactivityofCu2 Al6B4O1 7[2 ] ,whichhaveattractedgreatattentionofmanyscientificresearchers.Aspartofourefforttosynt…  相似文献   

7.
ATheoreticalStudyofNonlinearSecond┐OrderOpticalPropertiesofSubstitutedSilanes*SupportedbytheNationalNaturalScienceFoundationo...  相似文献   

8.
1INTRODUCTIONMacrocyclicdioxotetramineswithvariousfunctionalpendantshavereceivedmuchat tention,theintroductionofvariousadditi...  相似文献   

9.
StudiesofLaser-induced-MOCVDZincOxideFilmsRENPeng-cheng,TANZhong-keandLUOWen-xiu(CeiiterforFunctionalMaterialsResearch,Qingda...  相似文献   

10.
Traditionally ,thehydrothermalsynthesisofti taniumsilicalite 1 (TS 1 )needsalargeamountoftetrapropylammoniumhydroxide (TPAOH)asatemplate ( n(TPAOH) n(SiO2 ) =0 4~ 1 0 ) ,andthecrystallizationtimetakes 10~ 30d[1] .Recently ,muchattentionhasbeenpaidtothemodificationofsynthesi…  相似文献   

11.
Horseradishperoxidase(HRP)canstronglycatalyzethereactionofH2O2oxidizingophenylenediamine(OPD),thechromaticproductofwhichcanbedetectedinenzymelinkedimmunosorbentassay(ELISA)withspectrophotometry[1].Involtammetricenzymelinkedimmunoassay[2—4],OPDH2O2HRPsystemhasf…  相似文献   

12.
1INTRODUCTIONMacrocyclicdioxotetramineswithvariousfunctionalpendantshavereceivedmuchattention,theintroductionofvariousadditi...  相似文献   

13.
IntroductionThediscoveryofthesuperconductivityoftheBa-La-Cu-Osystemathightemperatureshasgreatlystimulatedtheinvestigationofcuprates[1].Cuprateshavebeenfoundtobeactivecatalystsforseveralreactions,includingthereductionanddecompositionofN2O,NOandNO2,the…  相似文献   

14.
Synthesis and Crystal Structure of a β—Lactam Derivative of 2,4—Diary   总被引:1,自引:0,他引:1  
李媛  杜彩云 《结构化学》1999,18(1):57-60
1INTRODUCTION1,5benzothiazepinesposespotentialbiologicalactivities〔1〕.CycloadditionreactionsattheirC=Ndoublebondhavearousedc...  相似文献   

15.
Incomparisonwithinorganicnonlinearoptic(NLO)materials,organicpolymericNLOmaterialshavemanyadvantages,suchasliablemoleculardesignandoptimization,largernonresonanceNLOcoefficiency,lowerdielectricconstant,goodworkingability,opticaltransparencyandresistancea…  相似文献   

16.
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   

17.
CyclopropanationofDiazoacetatewithOlefinsCyclopropanationofDiazoacetatewithOlefins¥ZhengNingLI;HuiLinCHEN(DalianInstituteofCh...  相似文献   

18.
1INTRODUCTIONEventhoughthestructureofparadodecatungstatepolyanion,〔H2W12O42〕10-,(Paradodecatungstate B)hasbenverywelestablish...  相似文献   

19.
TheN2Omoleculeplaysaveryimportantroleinozonechemistryintheatomosphere.Itsrovibrationalspectracanprovideusefulinformationabouttheintramoleculardynamicproperties.N2Oisalinearmoleculeattheequilibriumgeometryfortheelectronicgroundstate.Numerousinvestigatio…  相似文献   

20.
EffectofSubstitutingGroupontheCalculatedNonlinearSecond-OrderOpticalSusceptibilitiesofSubstitutedThiopheneDerivativeswithQuin...  相似文献   

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