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1.
IntroductionTheresistivityρ(T)ofsuperconductorsisdescribedasfollows[1]:κ(T<Tc)ρ(T)=ρ∥=AT(T>Tc,(abplane)ρ⊥=BT(T>Tc,(caxis)(1)HereA<B.Expression(1)accuratelysummariesuptheresistivitythroughmeasuringtheanisotropyconductivityofasinglecrystalofYBa2Cu3O(7-…  相似文献   

2.
IntroductionAtomtransferradicalpolymerization(ATRP),basedoncuproushalides(CuX)/2,2-bypyridine(bpy)/alkylhalides(RX)ascatalyst/initiatorsystem,isanewmethodtocontroltheradicalpolymerizationofstyreneand(methyl)methacrylate(MMA)[1,2].BecausetheCuCl/1,10…  相似文献   

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   

4.
1 INTRODUCTIONDimolybdenumalkynecomplexes〔Mo2(μR1C≡CR2)(CO)4(η5C5H5)2〕canreactwithavarietyofreagentssuchasphosphines,thiols,elementalsulfur,Ru3(CO)12andCo2(CO)8〔1-4〕.Intheproductsthealkyneligandisusuallyretained.Sometimes,alkynescissionoccurs.Being…  相似文献   

5.
IntroductionTransitionmetalhexacyanoferates,PrussianBlue(PB)anditssubstitutedanalogues,suchascobalthexacyanoferate(CoHCF),hav...  相似文献   

6.
KeywordIndexVol.5,1994ABInltloCI(995)ABInltlocalculation(5o7)Absorptiontrap(73)Acceleratormassspectrometry(873)(ic43)Aceteqen...  相似文献   

7.
1 INTRODUCTIONInoureffortstodevelopthelow-valenceMo-SRcompounds,wehavefoundanMo(0)-compound,〔Mo2(SR)2(CO)8〕2-,whichisobtainedfromthereactionofMo(CO)6withRS-inhighyield,possessesaninterestingtwo-electrontransferproperty.Numerouskindsofdinuclearmolybde…  相似文献   

8.
IntroductionCycloadditionreactionsthatareakindofimportantreactioninorganicchemistryhavebeenextensivelyusedinorganicsyntheses,especiallyinthesynthessofmedicine,aromalizerandnaturalmaterials[1—3].Inrecentyearsrareearthcomplexs[mostlyYb(fod)3,Eu(fod)3an…  相似文献   

9.
EffectsofY(Ⅲ)IonsontheFluorescencePropertiesofCe(Ⅲ)IonandtheOrganicLigandsintheComplexLIWen-lian.(ChangchunInstituteofPhysics...  相似文献   

10.
Introduction(+)-α-Cyperone(1)and(-)-α-10-epicyperone(2)arewidelyusedaschiraltemplatesforthesynthesisofothersesquiterpenederiv...  相似文献   

11.
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   

12.
IntroductionChronicMyeloidleukemia(CML)wasamaindiseaseshowntobeconsistentlyassociat-edwiththecytogeneticabnormalitynowknownasthePhiladelphia(Ph′)chromosome.Theabnormalityusuallyinvolvesareciprocaltranslocationbetweenchromosomes9and22,andmorethan95%of…  相似文献   

13.
IntroductionEletrothermalvaporization(ETV)asameansofsampleintroductioninmicrowavein-ducedplasma(MIP)sourcespectrometryhasbeen...  相似文献   

14.
SynthesesandMagneticPropertiesofCu(Ⅱ)-RE(Ⅲ)HeterobinuclearComplexeswithN,N′-Bis(3-carboxyisalicylidene)-trimethylenediamineTA...  相似文献   

15.
LiTi2(PO4)3ceramicsmayacquireahighelectricalconductivitybypartialysubstitutingsomeM3+ions(M=Al,Sc,Y,La)fortheTi4+ionsordoping...  相似文献   

16.
SpectralAnalysisandCrystalStructureofTris(benzoyl-trifluoroacetonate)bis(triphenyl-phosphineoxide)Europium(Ⅲ)LeiHeng-Yi;YangY...  相似文献   

17.
ApplicationoftheReactionsofFerrocene(Ⅰ)SaltswithBis[dicarbonyl(η ̄5-cyclopentadienyl)iron]andBis[dicarbonyl(η ̄4-butadiene)coba...  相似文献   

18.
IntroductionSeveralacyclicchiralinsectpheromonesarecharacterizedbyopticallyactiveerythro-methylalkanol.TypicalexamplesarethepheromoneofantTetramoriumimpurm(1a)andthetrailpheromoneofantLeptogenysdiminuta(1b).In1981,Pasteelsetal.[1]isolated4-methyl-3-h…  相似文献   

19.
IntroductionTheNO-3coordinationreactionswith(TPP)CoⅡwerecharacterizedusingthetechniquesofcyclic-voltammetry(CV)andspectroelet...  相似文献   

20.
Synthesis,CrystalStructureandThermode-compositionKineticsofCopper(Ⅱ)Complexwithbis-(Schiffbase)Derivedfrom3-Methoxysalicylald...  相似文献   

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