Preparation andcharacterizationofcarbamoylphosphonate(CMPO)silane grafted onvariousmesoporoussilicas

摘要

The carbamoylphosphosphonatesilane(CMPOanalogue;2-(diphenylphosphoryl)-N-(3-(triethoxysi- lyl)propyl)acetamide)modifiedmesoporoussilicawasprepared via a post-synthesisgraftingmethod for theeffectivepurificationofrareearthelements.TheguestCMPOanaloguewassynthesizedbydirect couplingreactionof2-(diphenylphosphoryl)aceticacidand3-(triethoxysilyl)propan-1-amine.Various mesoporoussilicatessuchasMCM-41,SBA-15,oramorphoussilicananoparticleswereadoptedashost materials.Theresultingsurface-modifiedmesoporousmaterialswerecharacterizedwithrespectto their structuralintegrity,surfacearea,andporesizeandtheconcentrationoftheCMPOsilanespecies. TheseCMPOfunctionalizedperiodicmesostructuredsilicatesofferthepotentialofapplicationsas catalysts,sensors,orenvironmentalsorbents.