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简介：Inthispaper,MPt/C(M=La,Nd)catalystsofPEMFCweresynthesizedbymicrowaveradiationprocess.ThecrystallinityandstructureofcatalystswererespectivelyanalyzedbyXRDandnitrogenadsorptiontests.Theactivityofcatalystswasinvestigatedbyelectrochemistryexperiment.Theresultsshowedthat:1)comparedwithPt/Ccatalystpreparedbytypicalimpregnation-reductionprocess,thesizeofMPt/CcatalystparticledecreasedandtheavailablecrystalforO2reductionincreased;2)theMPt/CcatalystshadrelativelyhighBETsurfaceareas;and3)thesecrystaltransformationsoftheMPt/Ccatalystbroughthightheelectrocatalyticactivity,andasaresult,improvedthepowerofPEMFC.

简介：Apolymer（poly（9,10-anthracenevinylene-alt-4,4’-（9,9-bis（4-（4’-（1,2,2’-triphenylvinyl）phenoxy）butyl）-9Hfluorene-2,7-diyl）dibenzaldehyde）,P1）wassuccessfullysynthesizedthroughtheWittig-Hornerreactionbyemployingfluoreneand9,10-distyrylanthracenemoietiesasbuildingblocksforbackboneandtetraphenylethenesaspendantgroups.Photophysicalandthermalpropertiesoftheresultingpolymericemitterwerefullycharacterizedbyultraviolet-visible（UVVis）absorptionandphotoluminescence（PL）spectra,thermogravimetricanalysis（TGA）anddifferentialscanningcalorimetry（DSC）.WhileP1emitsanorange-lightcenteredat567nmindilutetetrahydrofuran（THF）solution,thesolidpowderofthepolymerexhibitsstrongyellowemissionpeakedat541nm.Itisalsofoundthattheas-synthesizedpolymershowsuniquepropertyofaggregation-enhancedemission（AEE）.Inaddition,P1possesseshighthermalstabilitywithadecompositiontemperature(Td,5%)of430°Candhighmorphologicalstabilitywithaglasstransitiontemperature（Tg）of171°C.Underthestimulusofmechanicalforce,theemissionofP1canbechangedfromyellowtored(Δλmax=61nm),showingaremarkablemechanochromism.TheresultsfromXRDanalysissuggestthatsuchmechanochromicphenomenonofP1isprobablycausedbythedestructionofcrystallinestructure,whichleadstotheconformationalplanarizationofthedistyrylanthracenemoietiesformingbythepolymerizationandtheincreaseofmolecularconjugationofthebackbone.

简介：Electrostaticlayer-by-layerself-assemblymultilayerfilmsweresuccessfullyfabricatedfromC60-ethylenediamineadduct(C60-EDA)andDNA.Undervisiblelightirradiation,DNAisreadytobecleavedandthefilmsaredestroyed.

简介：Immobilizedtriazinedyeaffinitychromatographyhasbeenwidelyusedforproteinpurification.Inthispaper,CibacronBlueF3G-4wasimmobilized,throughaspacerarm,ontoarigidhydroplhilicporouspolymerbyreactinganepoxy-group-containingpoly(vinylalcohol)with6-aminohexyl-N'-CibacronBlueF3G-A,whichwasobtainedbyreactingCibacronBlueF3G-4withexcessof1,6-diaminohexane,inapH8.6buffer,Theepoxy-group-containingpoly(vinylalcohol)waspreparedbytreatingmacroporouspoly(vinylalcohol)withexcessepichlorohydrininthepresenceofNaOHindimethylsulfoxide.Themacroporouspoly(vinylalcohol)waspreparedbyhydrolysisofmacroporouscrosslinkedpoly(vinylacetate),whichwassynthesizedbysuspensioncopolymerizationofvinylacetateandtriallylisocyanurateinthepresenceofbutylacetateandn-heptaneasdiluents.TheCibacronBlueF3G-A-immobilizedpoly(vinylalcohol)waspackedinastainlesssteelcolumn(250×5mmI.D.)andthechromatographicbehaviorsofseveralproteins(cytochromec,lysozyme,bovineserumalbumin,insulin,andlactatedehydrogenase)weredetermined.

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简介：PolysaccharidecoatedPLAnanoparticlesbearingaldehydegroupswerepreparedbydialysisofDMSOsolutionofcholesterolhydrophobic-modifieddextranpolyaldehydeandPLAagainstwater.Theaveragediameterofthenanoparticleswasabout160nm,andthesizedistributionwasnearlyhomogenous.ThenanoparticleswerefunctionalizedsimultaneouslywithCD71andEGFRantibodythroughtheSchiff'sbasereaction,andthenradiolabeledwith~(99m)Tc.Afterperfusedtheradiolabelednanoparticlesintotumor-bearing...

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简介：Linearpolysiloxaneswithpendantbenzo-15-crown-5moietieshavebeensynthesizedfrom3′-or4′-allylbenzo-15-C-5viahydrosilylationofmethyldichlorosilane,followedbypolycondensationwithsilanol-terminatedpolydimethylsiloxane.Itwasfoundthatthepolysiloxanescouldbeusedascarriersinbulkliquidmembranetotransportions.Factorsinfluencingtransportratehavebeeninvestigated.

简介：Ourobjectivesweretodevelopanewchemicalmethodforthepolymerizationofpyrrole.CuCl2dissolvedinC2H5OHsolventisprimarilyusedfortheinitiationpolymerizationofpyrrole.ThepolymerswithdifferentyieldandconductivitywereobtainedbyraringtheinitialconcentrationofCu2+.TheinitialconcentrationsofCu2+variedfrom1.2×10-4moleto6.48×10-3moleCu2+with2.16×10-2molepyrrole.Thepolypyrroleobtainedwascharacterizedwithelementalanalyzer,XPS,IRspectroscopy,Four-pointprobeandSEM.

简介：两个都与高chemoselectivity介绍芳香、脂肪族的主要的氨基的组的一个一步舞过程被开发。三位字节州的丙酮从聚合电影底层的C-H契约和是积木和氨基的组搬运人的酚的O-H契约提炼氢原子。作为结果，二种自由激进分子，聚合物底层的限制的以碳为中心的链激进分子和活动以氧为中心的含苯氧基的激进分子，被产生。然后，公司契约被在这些二种自由激进分子之间的联合反应形成。p-Tyramine和p-aminophenol被用作氨基的搬运人。氨基的组的成功的介绍被水合同角度(CA)的大小表明到LDPE，BOPP和宠物电影底层上，紫外系列(紫外)，X光检查光电子光谱学(XPS)并且荧光灯显微镜学。处理因素p-tyramine和p-aminophenol的集中，和丙酮/水的比率例如紫外光的紧张和照耀时间，被调查。优化进程参数如下：紫外轻紧张9500W/cm2；为BOPP和LDPE的照耀时间18min，为宠物的22min；丙酮/水=的比率1；并且p-tyramine和p-aminophenol的集中15%为BOPP和LDPE，1%为宠物。基于紫外吸收度，聚合底层上的氨基的组被估计在6.3浥汵楳湯瀠汯浹牥穩瑡潩獮眠瑩?慣楴湯捩?湡潩楮?档牡敧?湩的范围吗？