激光等离子体诱导聚甲基硅氧烷的结构重组

2001592,185188ACTACHIMICASINICAVol.59,2001No.2,185188X(361005),,,X(CH3SiO1.5)n(n=8,10),.-,.,,,.,,StructuralRecombinationofPolymethylsiliconeInducedbyLaserPlasmaZHOUYi-NanHUANGRong-BinCHENLi-HuaYULa-JiaXIESu-YuanZHENGLan-Sun3(StateKeyLaboratoryforPhysicalChemistryofSolidSurface,DepartmentofChemistry,XiamenUniversity,Xiamen,361005)AbstractAspecialsyntheticreactionhasbeendeveloped,inwhichvaporofthereactantinteractswiththehightemperatureplasmageneratedbylaserablatingagraphitetarget.Byselectingchainedmethylsiliconeasreactant,aseriesofmethylsilsesquioxanesproductswithvariousstructuralconfigurationshavebeenobtained.Amongthem,twoproducts,whichwereseparatedbysublimationinhighvacuumandrecrystalization,werecharacterizedbyX-raycrystaldiffractionas(CH3SiO1.5)n(n=8,10).Bothofthemarefoundtohavethree-dimensionalcagestructure.Inaddition,otherproductswithdoubleringstructureweredetectedbyGC-MSanalysis.Theresultsdemonstratethepotentialapplicationofthesyntheticreaction.Inthereactiondescribedinthisarticle,resultingfromthecollisionandenergy-transferofthelaserplasma,chainstructureofthereactantdissociatedandrecombinedtogivethecageandringstructureoftheproducts.Keywordslaserablation,plasmasynthesis,methylsiloxane,.,,,,,;,;,[13].,,,.XE-mail:[e-mail]:2000-05-29,:2000-07-18,:2000-09-18,(29890210)(ReceivedMay29,2000.RevisedJuly18,2000.AcceptedSeptember18,2000)©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[4],,.(CH3SiO1.5)8Sprung[5],(CH3)(C2H5O)3Si.,Martynova[6],(CH3SiO1.5)n(n=812),(CH3SiO)4NaOH,.,,,,.11.1Spectra-PhysicsGCR-3.,1064nm,7ns,10Hz.,,1mm2,5109W/cm2.1,.,.,.,.,,.,.1Fig.1Syntheticequipmentscheme1.2FB-110/150110-4Pa,,540K.,.1.,2.ENRAF-NONIUSCAD-4,MoK(=0.071070nm),.1.3,GC-MS,.50/min,90290,1min.FinniganMatGCQ,EI,.ESI,FinniganMatLCQ,,,.22.1X1a=1.2497(2)nm,b=1.2497(2)nm,c=1.3093(2)nm,=90.05(2),=90.00(2),=119.98(1),V=1.771(2)nm3,,,(CH3SiO1.5)8,,,,[7].2:a=0.8588(2)nm,b=1.0728(3)nm,c=1.6723(3)nm,=88.71(2),=88.76(2),=90.01(2),V=1.540(3)nm3.,(CH3SiO1.5)10[8],5,.2.2GC-MS,.22.02min.,(M-H)-,430,(CH3)10Si6O7,,2(a),681Vol.59,2001©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(b),,,,EI-MS.(c),,..,,.3,.,,,.,,sp3,,,,,.[(CH3SiO1.5)8(CH3SiO1.5)10]:,,,,.781February2001:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()---.,,,,.:,,,.,,.,,,.References1Zhou,Y.-N.;Xie,S.-Y.;Chen,H.;Huang,R.-B.;Zheng,L.-S.Chem.J.ChineseUniversities,2000,21(5),789(inChinese).2Wang,Y.-H.;Huang,Q.-J.;Chen,Z.;Huang,R.-B.;Zheng,L.-S.Sci.China,Ser.B,1997,40(6),608.3Tang,Z.-C.;Chen,H.;Huang,R.-B.;Zheng,L.-S.;Zhou,G.-W.;Zhang,Z.Prog.Nat.Sci.,1999,9(8),757(inChinese).4Wallace,W.E.;Guttman,C.M.;Antonucci,J.M.J.Am.Soc.MassSpectrom.1999,10(3),224.5SprungM.M.;Guenther,F.O.J.Am.Chem.Soc.,1955,77,3990.6Martynova,T.N.;Korchkov,V.P.Ser.Khim.Nauk.,1984,(1),62.7Larsson,K.Ark.Kemi,1960,16,203.8Baidina,I.A.;Podberezskaya,N.V.;Borisov,S.V.;Alekseev,V.I.;Martynova,T.N.;Kanev,A.N.Zh.Strukt.Khim.,1980,21(3),125.(Ed.PANBing-Feng)881Vol.59,2001©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.