Therearevarioussynthesismethodsthathavebeenutilizedtoattachorganicgroupstosilicasurfaceviatheformationofcova-lentbonds.Thesearepost-syntheticfunctionalization (ghép), co-ngưng tụ (directsynthesis), productionofperiodicmeso-porousorganosilanes (Măng xông PMO) và kỹ thuật "tàu trong chai". Morerecently,Adametal.hadsuccessfullyimmobilizedchloropropy-ltriethoxysilane (CPTES) ontothesilicanetworkviaaone-potsynthesisusingthesol-gelmethod [61]. The29SiMASNMRspectrumoftheresultingorgano-silicaproduct,RHACCl(fig.7(a)) showschemicalshiftsattributedtoQ4andQ3 [Qn = Si (Osi) n (OH) 4−n], i.e.atı=−109.92and−100.65ppm.Achemicalshiftat−65.2ppmindicatestheformationofSiOSilinkageofCPTEStothesiliconatomofthesilicaviathreesiloxaneFig.6.HRTEMimagesofsolidafterheatingat (a) 0 h, (b) 4 h, (c) 8 h, và (d) 12 h [60].
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