简介：Theepoxideisakindofversatileintermediateformanufactureofawidevarietyoffinechemicals.Thegoalofmodemefficientcatalyticmethodsistoproducedesiredcompoundswithhighyield,selectivity,lowcost,safety,operationalsimplicityandmoreimportantlyenvironmentallybenignmanner.However,therearevariousoxidants,whichareoftenhazardousorexpensive,beingusedforbothlaboratoryandindustrialepoxidation.Hydrogenperoxide(30wt%)solutionisthoughtasoneoftheidealoxidantsbecausewaterisasoletheoreticalsideproduct.Meanwhiletheepoxidationofstyreneisatypicaloneamongolefins.Here,theperformanceofstyreneepoxidationwasstudiedwithhydrogenperoxidesolutioncatalyzedbyCo(Ⅱ)phenanthrolinecomplexencapsulatedinsupercagesofMCM-41.

简介：Phasebehaviorofbinarysystemofbromobenzene-chlorobenzene(C6H_5Br-C_6H_5Cl)confinedinSBA-15andMCM-41(porediameter8nm,3.8nm,respectively)hasbeeninvestigatedbymeansofdifferentialscanningcalorimetry(DSC).PhasediagramofC_6H_5Br-C_6H_5ClsystemconfinedinSBA-15isatypeofthecompletemisciblebothinliquidandsolidstate,thesamephasebehaviorasthebulksystem.However,thephasediagramcomprisesonlyoneboundaryline,whichisshifteddown22-36Kwithrespecttothebulksystem.C_6H_5Br,C_6H_5ClorthemixturewithinnanoporesofMCM-41isnonfreezing.ThedifferentphasebehaviorofthesystemconfinedinSBA-15andMCM-41isthoughtmainlyduetotherelativesizeofporetomolecule.

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简介：有spheres-within-a-sphere的合并Cu的订的六角形的mesoporous硅酸盐(Cu-MCM-41)凹陷结构作为合作模板用thermoreversible聚合物hydrogelmethylcellulose(MC)和cationic表面活化剂被综合了，它被扫描电子显微图(SEM)描绘了，X光检查衍射(XRD)，传播电子显微图(TEM)，并且N2吸附解吸附作用等温线。获得的结果显示合并Cu的MCM-41材料的形态学是“spheres-within-a-sphere”空组织，它很类似于的蜂窝状。在有H2O2的苯hydroxylation，空范围比Cu-MCM-41的粒子显示出许多更高催化的活动。

简介：合成了外围具有柔性链状基团的2（3），9（10），16（17），23（24）-四-（N，N-二乙胺基乙氧基）Ni-酞菁配合物（2）．以正硅酸乙酯为硅源，十六烷基三甲基溴化铵为模板剂，水热法将该Ni-酞菁配合物（2）装载到MCM-41中．利用UV-Vis-NIR，FT-IR，XRD，TEM，FESEM及N2吸附-脱附等温线对制备的样品进行了表征．研究表明制备的样品中Ni-酞菁配合物（2）主要以单体和二聚体的形式存在于MCM-41中．通过不同制备酞菁浓度的装载研究表明，较高制备酞菁浓度有利于制备结晶度及孔道有序性较高的介孔分子筛样品．

简介：Achiralrutheniumcomplex[(1S,2S)-DPEN]-RuCl_2(PPh_3)_2(DPEN=1,2-diphenylethylenediamine,PPh_3=triphenylphosphine)wasencapsulatedinthechannelofAl-MCM-41byelectrostaticadsorptionand1,1-dichlorosilacyclobutanemodification.Thepreparedheterogeneouscatalystshowedthesamecatalyticactivityandenantioselectivityasthecorrespondinghomogeneouscatalystintheasymmetrichydrogenationofacetophenone,andcouldbereusedatleastseventimeswithoutsignificantlossofcatalyticactivityandenantioselectivity.