简介：Thesixmultiimidazolecopper(Ⅰ)complexesareutilizedtomimictyrosinase.Themainproductis3,5-di-t-butylcatecholfromo-hydroxylationofthesubstrate2,4-di-t-butylphenol.Thehighestyieldofcatecholisupto82.2%andselectivity94.8%by[Cu(I)_(3b)(MeCN)_2](ClO_4)_2andO_2undermildconditions,whicharefoundtobemoreefficientthanthatalreadyreported.

简介：HydrolysisofDNAisanimportantenzymaticreaction,butitisexceedinglydifficulttomimicinthelaboratorybecauseofthestabilityofhydrolysisofDNA.Inthispaper,thecleavageactivityofcomplexesformedbetweenCu(Ⅱ)andfourdifferentaminoacidoraminoacidmethylesteronDNAisstudiedbygelelec-trophoresis.ItisfoundthatDNAcouldbecleavedbyCu(Ⅱ)-L-HisandCu(Ⅱ)-L-Hismethylestercomplexesandtheefficiencyofcleavageislargelydependentonthemetalion-to-ligandratio.FurtherexperimentsshowthatthecleavageofDNAmediatedbyCu(Ⅱ)-L-HiscomplexesoccursviaahydrolyticmechanismandtheactivechemicalspeciesthataffectsDNAcleavageisproposedtobeMI2H+andML2H22+.

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简介：Anewmethodisdescribedfortheelectrolessdepositionofcopperontoglass.Commerciallyavailableglassslidewasmodifiedwithγ-aminopropyltrimethoxysilanetoformself-assembledmonolayer(SAM)onit.ThenitwasdippeddirectlyintoPdCl2solutioninsteadoftheconventionalSnCl2sensitizationfollowedbyPdCl2activation.ExperimentalresultsshowedthatthePd^2+ionsfromPdCl2solutionwerecoordinatedtotheaminogroupsontheglasssurfaceresultingintheformationofN-Pdcomplex.Inanelectrolesscopperbathcontaininaformaldehydereducingagent,theN-PdcomplexeswerereducedtoPd^0atoms,whichthenactedascatalystsandinitiatedthedepositionofcoppermetal.AlthoughthecopperdepositionrateonSAM-modifiedglasswasslowatthebeginning,itreachedtothatofconventionalmethodinabout5min.

简介：Raney-Copper(R-Cu)catalystwaspreparedanditssinteringbehaviourinatmospheresatteperature300℃-600℃wasdetectedbymethodsofSSA,PSD,XRDandSEM.ItwasfoundthatsinteringofR-Custartedfrommuchlowertemperaturethanthemeltingpointofcopper.Changesbothonthesurfaceandinthebodyphasewerediscovered.ThereisaruleintheextentofsinteringforR-Cuindifferentatmosphereswhichisrelatedtotheadsorptionoftheparticulargasesmoleculesonthesurfaceofthecatalyst.Dynamicalequationsofthesurfacedecreaseisestablishedandthemechanismofsinteringisdiscussed.Calculationsofquantummechanicsgivethesimilarresults.

简介：Anovelcomplex,[Cu2(phen)(sal)(Hsal)2]n(1),wassynthesizedandstructurallycharacterized.Thebasicdimericunitsareholdbysalligandsandextendedinto1-Dnetwork.Thecarboxylategrougsofsalicylatescoordinatetothecentralioninthreedifferentcoordinationmodes:chelating,bridgingandbridging-chelating.Inthecaseofbridging-chelatingofthecarboxylategroupofthesalicylate,allthreeoxygenatomsofsalicylatearebidentatelycoordinatedtocopperion,namely,μ4-η^3bindingmode.

简介：Fournewu-oxamidoheterobinuclearcomplexeshavebeensynthesizedandidentifiedas[Cu(oxap)Fe(L)2]SO4,whereoxapdenotestheN,N’-bis(2-aminopropyl)oxamidodianionandLrepresentsdiaminoethane(en);1,3-diaminopropane(pn);1,2-diaminopropane(ap)and2,9-dimethyl-1,10-phenanthroline(Me2-phen).Basedontheelementalanalyses,spectroscopicstudies,magneticmoments(atroomtemperature)andmolarconductivitymeasurements,extendedoxamido-bridgedstructuresconsistingofacopper(Ⅱ)andaniron(Ⅱ)ions,whichhaveasquareplanarenvironmentandanoctahedralenvironment,respectively,areproposedforthesecomplexes.Complexes[Cu(oxap)Fe(en)2]SO4(1)and[Cu(oxap)Fe(pn)2]SO4(2)havebeencharacterizedbyvariabletemperaturemagneticsusceptibility(4.2~300K)andtheobserveddatawereleast-squaresfittedtothesusceptibilityequationderivedfromthespinHamiltonianincludingsingle-ionzero-fieldinteractionfortheiron(Ⅱ)ion,H=-2JS1.S2-DSzl2,givingtheexchangeintegralsJ=-2

简介：Fourμ-oxamidoheterodinuclearcomplexes,[Cu(oxae)Cr(L)2](NO3)3,whereoxaedenotestheN,N’-bis(2-aminoethyl)oxamidodianionandLrepresents1,10-phenanthroline(phen);5-nitro-1,10-phenanthroline(NO2-phen);5-methyl-1,10-phenanthroline(Me-phen)and2,2’-bipyridine(bpy),havebeensynthesizedandcharacterizedbyelementalanalyses,magneticmoments(atroomtemperature)andmolarconductivitymeasurementsandspectroscopy.Itisproposedthatthesecomplexeshaveextendedoxamido-bridgedstructuresconsistingofacopper(Ⅱ)ionandachromium(Ⅲ)ion,whichhaveasquareplanarenvironmentandoctahedralenvironment,respectively.Thecryomagneticpropertiesofthe[Cu(oxae)Cr(bpy)2](NO3)3(1)and[Cu(oxae)Cr(phen)2](NO3)3(2)complexeshavebeenmeasuredovertherangeof4.2-300K.Theleast-squaresfitoftheexperimentaldatabasedonthespinHamiltonian,H=-2JS1·S2,theexchangeintegrals(J)wereevaluatedas+36.9cm-1for1and+35.8cm-1for2.Theresultshaveconfirmed

简介：10mol%CuIcombinedwiththeDMEDAligandcanefficientlycatalyzetheN-arylationof2-arylindoleswitharyliodidesandarylbromidesingoodtoexcellentyields.Thearylhalidesbearingelectron-richorelectron-deficientfunctionalgroupscanbewelltoleratedunderthismildreactionconditions.

简介：Apyridoxal-basedchemosensorwassynthesizedbyreactinghydrazinehydrateandpyridoxalhydrochlorideinethanolandcharacterizedbyNMRandESI-MS.Theopticalpropertiesofthecompoundwereinvestigatedinamethanol:HEPESsolution.ThecompounddisplayedselectivityforCu2+,asevidencedbyacolorlesstoyellowcolorchange,whichwascharacterizedusingUV–visspectroscopy.ThefluorescenceofthecompoundcanbequenchedonlybyCu2+,accompanyingbyacolorchangefrombluetocolorless.Furthermore,itcanbeusedinbioimaging.

简介：Aseriesofcopper(Ⅱ)complexeswithpyridineN-oxide-2-ylmethylidened-ithiocarbazatesasligandsweresynthesizedandcharacterizedbyIRspectra,electronicspectraandmagneticmomentsmeasurementatroomtemperature.Variabletemperaturemagneticsusceptibilites(3-300K)offourcomplexsweremeasuredandfittedwiththeBleaney-Bowersdimerequationbyconsideringthemagneticinteractionbetweenmolecules.Thefittingresultsshowtheexistenceofintramolecularferromagneticinteractionsandintermolecu-laranti-ferromagneticinteractionsinthesecopper(Ⅱ)complexes.

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简介：ReactionsofCuSCNwithtetramethylthiuramdisulfideinCH3CNinthepresenceofstyreneandN,N,N',N',N'-pentamethyldiethylenetriaminegaverisetoanewcopper(Ⅰ)complexofN,N'-dimethyldithio-cabamate{[Cu(S2CNMe2)]2}n.ThetitlecompoundcrystallizedinthetriclinicP-1spacegroupwithlatticeparametersα=0.7610(4)nm,b=0.8911(4)nm,c=0.9268(5)nm,α=68.66(1)°,β=83.88(2)°,γ=79.31(2)°,V=0.5748(5)nm^3,Z=2.Thecompoundhasaunique1DchainstructurecomposedofCuSCSCuSCSeight-memberedringsandapairofCu-Sbonds,thestructureofwhichhasbeendeterminedbysingle-crystalX-raycrystallography.Theisolationofthiscompoundmayprovidesomehelpfulinformationforthecauseoftheinductionperiodsofthereverseatomtransferradicalpolymerization.

简介：ＩｎｔｒｏｄｕｃｔｉｏｎＨｅｔｅｒｏｂｉｎｕｃｌｅａｒｃｏｍｐｌｅｘｅｓａｒｅｅｒｙｖｅｒｙｉｍｐｏｒｔａｎｔｉｎａｎａｔｅｍｐｔｔｏｍｉｍｉｃｔｈｅｓｔｒｕｃｔｕｒａｌａｎｄｆｕｎｃｔｉｏｎａｌｐｒｏｐｅｒｔｉｅｓｏｆｂｉｏｌｏｇｉｃａｌｓｙｓｔｅ...

简介：Tetrazole-1-aceticacidwasfoundtoserveasasuperiorligandforCuI-catalyzedN-arylationofimidazoleswitharyliodidesunderalowcatalystloading(5mol%ofCuI).AvarietyofaryliodidescouldbeaminatedtoprovidetheN-arylatedproductsingoodtoexcellentyieldswithouttheneedofaninertatmosphere.

简介：Thecrystalandmolecularstructureofcopper(Ⅱ)dimericcomplexofS-methyl-B-N-(pyridineN-oxide-2-ylmethylidene)dithiocarbazatewithacetonitrile,[CuL(CH3CN)]2(ClO4)2,wasdeterminedbyX-raydiffraction.ThecomplexcrystalizesinmonoclinicsystemwithspacegroupP21/n,a=7.685(2),6=20.160(6),c=10.847(5)A,B=107.89(3),Z=2,Dc=1.788g/cm3,F(000)=835.8,u=18.17cm-1(Moka,R=0.057.EachCu(Ⅱ)ioninthecomplexissurroundedbyadistortedsquarepyramidal.ThebasalplaneiscomprisedofS,NandOatomsofoneligandtogetherwithaNatomofthesolvent--acetonitrile,whiletheaxialpositionisoccupiedbytheSatomoftheotherligand.ThebondlengthofCu-S(bridging)is3.038A.andCu-Cudistanceis3.700A.

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简介：Thepalladium-salencomplexpalladium(Ⅱ)N,N'-bis{[5-(triphenylphosphonium)-methyl]salicylidene}-l,2-ethanediaminechloridewasfoundtobeahighlyactivecatalystforthecopper-andsolvent-freecouplingreactionofterminalalkyneswithdifferentacylchloridesinthepresenceoftriethylamineasbase,givingexcellentynonesunderaerobicconditions.

简介：Poly(4-vinylpyridine)supportednanoparticleofcopper(Ⅰ)iodideisreportedasagreenandrecyclablecatalystfortheregioselectivesynthesisof1,4-disubstituted-1H-1,2,3-triazolesfrombenzylhalides,sodiumazideandterminalalkynesinwater.Thiscatalystcanberecoveredbysimplefiltrationandrecycledupto8consecutiverunswithoutanylossofitsefficiency.

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.