简介:Thecrystalstructureofthetitlecomplex{[Co(TCB)2/2-(IMI)2(H2O)2][Co(IMI)4(H2O)2]}(H2O)4(whereTCB=1,2,4,5-benzenetetracarboxylicanion;IMI=imidazole)hasbeendeterminedbyX-raydiffractionmethod.Crystaldatafor{[Co(TCB)2/2(IMI)2(H2O)2][Co(IMI)4(H2O)2]}-(H2O)4:triclinic,spacegroupP1,a=1.0647(2)nm,b=1.1165(1)nm,c=1.00361(1)nm,α=91.56(1)°,β=111.34(1)°,γ=115.642(10)°,V=0.9772(3)nm5,Z=1.Thepolymercobalt(II)complexhasanovelthree-dimensionnetworkstructure.Co(1)atomandCo(2)atombotharecoordinatedinanoctahedralarrangementandlocatedinthecenterofthecoordinationanionandthecenterofthecoordinationcation,respectively.MoreoverfourcarboxylgroupsofTCBaredividedintotwotypes,twopara-carboxylgroupsbridgeCo(1)atominmonodentatefashionandothertwopara-carboxylgroupsareinfree.
简介:StudiesonElectrolyticCodepositionofLanthanum-CobaltinUreaMeltQiuKairong(丘开容),YangQiqin(杨绮琴)(DepartmentofChemistry,ZhongshanUn...
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简介:高度强制的钴铁酸盐nanoparticles被他们的暂停的直接注射为加热为磁性的过高热综合并且学习进一个强壮的听觉频率的磁场的一个肿瘤和应用。物理(在液体和稳固的分散的动态磁性的磁滞现象和热产生),生物(在进老鼠肿瘤织物的治疗学的数量的粒子的毒性和穿入)象其它一样,粒子的性质被学习。一个模型被开发为Brownian和常规旋转与一篇报道在磁性的nanoclusters的暂停描述magnetodynamics,到提供观察现象的理解。开发的试验性、理论的技术为低频率的热产生为磁性的nanoparticles的可控制的合成形成了一个基础在医药并且另外的应用程序。
简介:Amildandefficientmethodfordiacetylationreactionwasdeveloped,bywhichdiacetatecouldbeachievedthroughthereactionofaldehydewithaceticanhydride,inthepresenceofcobaltsulfate,withanadmirableyield,atroomtemperature,withoutsolvent.Thecatalystcouldberecycledsixtimeswithoutadistinctlossofactivity.
简介:Mixedmetaloxidesinthenanoscaleareofgreatinterestformanyaspectsofenergyrelatedresearchtopicsaswatersplitting,fuelcellsandbatterytechnology.Thedevelopmentofscalable,cost-efficientandrobustsyntheticroutestowardwell-definedsolidstatestructuresisamajorobjectiveinthisfield.Whilemonometallicoxideshavebeenstudiedinmuchdetail,reliablesyntheticrecipestargetingspecificcrystalstructuresofmixedmetaloxidenanoparticlesarelargelymissing.Yet,inordertomeettherequirementsforabroadrangeoftechnicalimplementationitisnecessarytotailorthepropertiesofmixedmetaloxidestotheparticularpurpose.Here,wepresentastudyontheimpactofthenatureofthegasenvironmentontheresultingcrystalstructureduringapost-synthesisthermalheattreatmentofmanganese–cobaltoxidenanoparticles.Wemonitortheevolutionofthecrystalphasestructureasthegasatmosphereisalteredfrompurenitrogentosyntheticairandpureoxygen.Theparticlesizeandhomogeneityoftheresultingnanoparticlesincreasewithoxygencontent,whilethecrystalstructuregraduallychangesfromrocksalt-liketopurespinel.Wefindthecompositionoftheparticlestobeindependentofthegasatmosphere.Themanganese–cobaltoxidenanoparticlesexhibitedpromisingelectrocatalyticactivityregardingoxygenevolutioninalkalineelectrolyte.Thesefindingsoffernewsynthesispathwaysforthedirectpreparationofversatileutilizablemixedmetaloxides.
简介:忍受2,6二度(imino)的一系列钴建筑群含苯氧基的ligands,LCoCl2[L=2,6-(ArNCH)2CH3C6H2OH]被ligand2,6二度(imino)的反应综合有钴二氯化物的相等的鼹鼠的酚,和这些建筑群被元素的分析描绘,1HNMR,MS和红外系列。一建筑群的结构被单个水晶X光检查衍射分析决定。
简介:Analumina-supportedcobaltaerogelcatalystpreparedfromasol-gelandasupercriticaldryingmethodwasusedinthecatalyticdecompositionofmethane.Thephysical-chemicalpropertiesofthecatalystwerecharacterizedanditsactivityformethanedecompositionwasinvestigated.Theeffectsofcalcinationandreactiontemperaturesontheactivityofthecatalystandthemorphologyofthecarbonnanotubesproducedwerediscussed.ACoAl2O4spinelstructureformedinthecalcinedcatalyst.Thequantityofthenanotubesproducedinthereactionincreaseswiththeamountofcobaltinthereducedcatalyst.Ahigherreactiontemperatureleadstoahigherreactionrate,thoughfasterdeactivationofthecatalystoccurswiththechange.Thecarbonnanotubesgrownonthecatalysthavesmoothwallsanduniformdiameterdistribution.
简介:AnewmodifiedcarbonpasteelectrodebasedoncyclamasamodifierwaspreparedforthedeterminationofCo(Ⅱ)ions.TheproposedelectrodeshowsaNernstianslope28.4mVperdecadeoverawideconcentrationrange5.0×10-6_1.0×10-1mol/LofCo2+ionswithdetectionlimit2.5×10-6mol/L.ThesensorexhibitsgoodselectivitiesforCo2+overawidevarietyofothercations.Itcanbeusedasanindicatorelectrodeinpotentiometrictitrationofcobalt(Ⅱ)ionsaswellasindirectdeterminationofcobalt(Ⅱ)ionsinwastewaterofacidiccobaltelectroplatingbath.TheelectrodeshowsNernestianbehaviorinasolutionof25%ethanol.
简介:Cobaltporphyrincomplexes(TPPCo~ⅢX)(TPP=5,10,15,20-tetraphenyl-porphyrin;X=halide)incombinationwithbis(triphenylphosphine)iminiumchloride(PPNCl)wereusedforthecopolymerizationofcyclohexeneoxideandCO_2.Thehighestturnoverfrequencyof67.2h~(-1)wasachievedafter13hat20℃,andtheobtainedpoly(1,2-cyclohexylenecarbonate)(PCHC)showednumberaveragemolecularweight(M_n)of10×10~3.ThoughtheobtainedPCHCshowedatacticstructure,them-centeredtetradscontentreached58.1%atCO_2pressureof1.0MPa,anddecreasedto51.9%atCO_2pressureof6.0MPa,indicatingthatitwasinclinedtoformatacticpolymerathighCO_2pressure.
简介:新奇建筑群[公司(phen)2HPlP]Cl3[phen=phenanethroline,HPIP=2-(2-hydroxyphenyl)imidazo[4,5-f][l,10]phenanethroline]被元素的分析综合了,在结构上描绘了,紫外,红外和1HNMR光谱学。有小牛胸腺DNA(CTDNA)的建筑群的相互作用被学习了使用吸收和排放光谱学,DNA融化技术和周期的voltammetry。混合物看吸收hypochromicity,荧光改进和DNA融化温度增长是否有约束力到CTDNA。CV测量与DNA的增加在山峰电流在减小潜力和一个变化显示出移动。这些结果证明混合物插入到DNA基础对的地席。山峰潜力的移动显示在建筑群和DNA之间的离子相互作用模式。到DNA的混合物的有约束力的常数是4.37灳慬瑮?郥誸???蚰铧?髧??螻?趤??藥???藥薗郧芀漀椭吗??
简介:Theadsorptionandelectronicpropertiesofisolatedcobaltphthalocyanine(CoPc)moleculeonanultrathinlayerofNaClhavebeeninvestigated.High-resolutionSTMimagesgiveadetailedpictureofthelowestunoccupiedmolecularorbital(LUMO)ofanisolatedCoPc.ItisshownthattheNaClultrathinlayerefficientlydecouplestheinteractionofthemoleculesfromtheunderneathmetalsubstrate,whichmakesitanidealsubstrateforstudyingthepropertiesofsinglemolecules.Moreover,strongdependenceoftheappearanceofthemoleculesonthesamplebiasintheregionofrelativelyhighbias(>3.1V)isascribedtotheimagepotentialstates(IPSs)ofNaCl/Cu(100),whichmayprovideuswithapossiblemethodtofabricatequantumstoragedevices.
简介:EfficientcatalyticoxidationofethylbenzenetoacetophenonewasrealizedusingthecatalyticsystemofcobaltzeoliticimidazolateframeworkZIF-67/N-hydroxyphthalimide(NHPI)undermildconditions.95.2%conversionofethylbenzenewith90.3%selectivitytoacetophenonecouldbeobtainedat373Kunder0.3MPaO2for9h.TheresultsshowthatthereexistssynergeticeffectbetweenZIF-67andNHPI.1-Phenylethylhydroperoxide(PEHP)wasgeneratedviaaradicalprocessinvolvingthehydrogenabstractionfromethylbenzenebyphthalimideN-oxyl,andsubsequentlyeffectivelydecomposedtoacetophenonebyZIF-67.
简介:SelectivelyconvertingCOandH2togasolineproduct(isoparaffinandolefin)inonestepstillremainsagreatchallenge.WedemonstrateeffectiveH-USYzeolitesupportednano-cobaltbifunctionalcatalystsforthiscatalyticreaction,whicharepreparedbythenovelphysicalsputteringprocess.Particlesofthesputteredcobaltexistinnano-levelandarewell-dispersedonacidUSYzeolite.Easyactivationoftheloadednano-cobaltisalsoachievedinalow-temperaturehydrogenreductionatmosphere.Inthetandemcatalyticreaction,thesputteredbifunctionalCo/USYcatalystexhibitsamuchhigherCOconversionandhigherisoparaffinselectivitythantheconventionalimpregnatedone.ComparedwithH-Mor,H-Betaandotherzeolitessupportedcatalysts,H-USYzeolitesupportedcobaltcatalystshowstheclearestpromotionaleffectontheactivityofFischerTropschsynthesis.Thedescribedsynthesishereinprovidesanewpathwaytosolvetheproblemcausedbythestrongmetal-supportinteraction(MSI)inheterogeneouscatalysis.