salenmn的固載化及其催化反式二苯乙烯環(huán)氧化反應(yīng)的研究

1、湖南師范大學碩士學位論文SalenMn的固載化及其催化反式二苯乙烯環(huán)氧化反應(yīng)的研究姓名：廖慧英申請學位級別：碩士專業(yè)：有機化學指導教師：伏再輝20050501ABSTRACTSalen—MncomplexhasbeensuccessfullygraftedorencapsulatedintomesoporoussilicasHMSbychemicallybondingor“shipinbottle”methods，F(xiàn)TIR，XRDand

2、TG—DSCwereadoptedtocharacterizethesecatalystsTheepoxidationofE—stilbenewasemployedtocheckthecatalyticperformancesofthesecatalystsTheresultswereasfollows：(1)Threehexagonalmesoporoussilicas(HMS)withdifferentsurface’Sgroups

3、(一OH，一NH2，一CHO)havebeensuccessfullypreparedbychemicallygraftingmethodsandwereusedtoencapsulateSalenMncomplexesbymicrowaveirradiation，ultrasonicwaveandconventionaladsorptionmethodsTheinteractionbetweenSalen—Mncomplexesand

4、thesurface’SgroupsofHMSwereinvestigatedbyFTIRandTG—DSCcharacterizationtechnologyThedispersiondegreeofSalen—MncomplexesintheHMSwascharacterizedbyXRDMnloadingWaSdeterminedbycoordinatedtitrationTheeffectsofthesurface’Sgroup

5、sofHMSonthecatalyticactivityandselectivityofSalen—MncomplexforE—stilbeneepoxidationwereinvestigatedTheresultsindicatedthattheHMSwithsurface’SNH2or—CHOcouldimmobilizesalen—Mncomplexmoreefficientlythanthatwithsurface’S—OH，

6、therefore，theformerpossessedobvioushighersalen—MnloadingandE—stilbeneconversionandwithaconcomitantlowerMnleachingthanthelatterinthecatalyticreactionprocessFurthermore，thegraftingsomebulklargemoleculesontheoutletofttMSabs

7、orbedsalen—MncomplexescouldfurtherreducetheMnleachingandenhancetheselectivityfortheepoxidesMoreover，wefoundthatmicrowaveirradiationwasthebestmethodforpreparingthesalenMnencapsulatedHMScatalystsamongthethreemethods(2)Sale