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42 个结果
  • 简介:PalmSource公司于去年年底宣布向许可商提供PalmOSCobalt,PalmOSCobalt就是大家所谈论的PalmOS6操作系统。那么PalmOS6到底有什么新的特性?到底是何方神圣?能不能在争夺日益激烈的掌上设备操作系统中取得优势?在大家对PalmOSCobalt盼望、猜测和充满疑问的时候,《数码·移动通讯》整理了一些读者们最感觉兴趣问题,通过越洋电话对PalmSource公司PalmOSCobalt产品经理JohnCook先生进行了独家专访,以下就是此次越洋电话专访的内容。

  • 标签: PalmSource公司 PALM OS COBALT PALM OS6操作系统
  • 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.

  • 标签: POLYMER cobalt(Ⅱ) COMPLEX crystal structure octahedron
  • 简介:StudiesonElectrolyticCodepositionofLanthanum-CobaltinUreaMeltQiuKairong(丘开容),YangQiqin(杨绮琴)(DepartmentofChemistry,ZhongshanUn...

  • 标签: La-Co ALLOY Electrolytic codeposition MOLTEN SALT
  • 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。

  • 标签: 钴元素 铁素体 磁悬浮液 动力磁现象
  • 简介:Amildandefficientmethodfordiacetylationreactionwasdeveloped,bywhichdiacetatecouldbeachievedthroughthereactionofaldehydewithaceticanhydride,inthepresenceofcobaltsulfate,withanadmirableyield,atroomtemperature,withoutsolvent.Thecatalystcouldberecycledsixtimeswithoutadistinctlossofactivity.

  • 标签: 乙醛催化剂 硫酸钴 选择性合成 回收 化学 活动时间
  • 简介:Mixedmetaloxidesinthenanoscaleareofgreatinterestformanyaspectsofenergyrelatedresearchtopicsaswatersplitting,fuelcellsandbatterytechnology.Thedevelopmentofscalable,cost-efficientandrobustsyntheticroutestowardwell-definedsolidstatestructuresisamajorobjectiveinthisfield.Whilemonometallicoxideshavebeenstudiedinmuchdetail,reliablesyntheticrecipestargetingspecificcrystalstructuresofmixedmetaloxidenanoparticlesarelargelymissing.Yet,inordertomeettherequirementsforabroadrangeoftechnicalimplementationitisnecessarytotailorthepropertiesofmixedmetaloxidestotheparticularpurpose.Here,wepresentastudyontheimpactofthenatureofthegasenvironmentontheresultingcrystalstructureduringapost-synthesisthermalheattreatmentofmanganese–cobaltoxidenanoparticles.Wemonitortheevolutionofthecrystalphasestructureasthegasatmosphereisalteredfrompurenitrogentosyntheticairandpureoxygen.Theparticlesizeandhomogeneityoftheresultingnanoparticlesincreasewithoxygencontent,whilethecrystalstructuregraduallychangesfromrocksalt-liketopurespinel.Wefindthecompositionoftheparticlestobeindependentofthegasatmosphere.Themanganese–cobaltoxidenanoparticlesexhibitedpromisingelectrocatalyticactivityregardingoxygenevolutioninalkalineelectrolyte.Thesefindingsoffernewsynthesispathwaysforthedirectpreparationofversatileutilizablemixedmetaloxides.

  • 标签: 混合金属氧化物 合成途径 纳米颗粒 钴氧化物 结构相关性
  • 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。

  • 标签: COBALT COMPLEX SCHIFF-BASE CRYSTAL structure
  • 简介:Analumina-supportedcobaltaerogelcatalystpreparedfromasol-gelandasupercriticaldryingmethodwasusedinthecatalyticdecompositionofmethane.Thephysical-chemicalpropertiesofthecatalystwerecharacterizedanditsactivityformethanedecompositionwasinvestigated.Theeffectsofcalcinationandreactiontemperaturesontheactivityofthecatalystandthemorphologyofthecarbonnanotubesproducedwerediscussed.ACoAl2O4spinelstructureformedinthecalcinedcatalyst.Thequantityofthenanotubesproducedinthereactionincreaseswiththeamountofcobaltinthereducedcatalyst.Ahigherreactiontemperatureleadstoahigherreactionrate,thoughfasterdeactivationofthecatalystoccurswiththechange.Thecarbonnanotubesgrownonthecatalysthavesmoothwallsanduniformdiameterdistribution.

  • 标签: 碳纳米管 溶胶凝胶体 催化分解 钴催化剂 气凝胶
  • 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.

  • 标签: 磺酸钠改性碳糊电极 电势测定 离子传感器 钴(Ⅱ)离子
  • 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.

  • 标签: 高二氧化碳 氧化物 钴卟啉 环己烯 催化剂 共聚
  • 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??

  • 标签: cobalt(III) mixed-polypyridyl DNA BINDING MODE
  • 简介:Co-M(M=公司,Ni,Fe,Mn)分层的双氢氧化物(LDH)被hexamethylenetetramine(HMT)成功地制作热分解方法。合成电极被做用一自己组装在没有文件夹的无机/器官的表面的时尚并且被用来催化氧进化反应。水氧化能在与谦虚过电位操作的中立电解质发生。做另外的过渡金属阳离子负担得起混合原子价,因此,更多为dioxygen分子的可逆化学吸着宣布电子相互作用。在水氧化过程采用LDH材料的应用程序预示很好便于未来氢利用。

  • 标签: 层状双金属氢氧化物 双氢氧化物 电解质 中性 钴基 电化学
  • 简介:Theadsorptionandelectronicpropertiesofisolatedcobaltphthalocyanine(CoPc)moleculeonanultrathinlayerofNaClhavebeeninvestigated.High-resolutionSTMimagesgiveadetailedpictureofthelowestunoccupiedmolecularorbital(LUMO)ofanisolatedCoPc.ItisshownthattheNaClultrathinlayerefficientlydecouplestheinteractionofthemoleculesfromtheunderneathmetalsubstrate,whichmakesitanidealsubstrateforstudyingthepropertiesofsinglemolecules.Moreover,strongdependenceoftheappearanceofthemoleculesonthesamplebiasintheregionofrelativelyhighbias(>3.1V)isascribedtotheimagepotentialstates(IPSs)ofNaCl/Cu(100),whichmayprovideuswithapossiblemethodtofabricatequantumstoragedevices.

  • 标签: STM图像 NACL 酞菁钴 状态 分子轨道 介导
  • 简介:EfficientcatalyticoxidationofethylbenzenetoacetophenonewasrealizedusingthecatalyticsystemofcobaltzeoliticimidazolateframeworkZIF-67/N-hydroxyphthalimide(NHPI)undermildconditions.95.2%conversionofethylbenzenewith90.3%selectivitytoacetophenonecouldbeobtainedat373Kunder0.3MPaO2for9h.TheresultsshowthatthereexistssynergeticeffectbetweenZIF-67andNHPI.1-Phenylethylhydroperoxide(PEHP)wasgeneratedviaaradicalprocessinvolvingthehydrogenabstractionfromethylbenzenebyphthalimideN-oxyl,andsubsequentlyeffectivelydecomposedtoacetophenonebyZIF-67.

  • 标签: 催化氧化 氧化钴 乙苯 骨架 咪唑 沸石
  • 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.

  • 标签: USY沸石 CO转化率 钴催化剂 溅射工艺 纳米级 合成气