Silicalite-1分子筛氢键诱导晶化机制的固体核磁共振研究（英文）

Silicalite-1分子筛氢键诱导晶化机制的固体核磁共振研究（英文）Title: Solid-state NMR Investigation of Hydrogen Bond-induced Cr

Silicalite-1 分子筛氢键诱导晶化机制的固体核磁共 振研究（英文） Title:Solid-stateNMRInvestigationofHydrogen Bond-inducedCrystallizationMechanismofSilicalite-1Zeolite Abstract: Silicalite-1zeoliteisawidelystudiedmaterialduetoits uniquepropertiesandpotentialapplicationsinvariousfields, includingcatalysis,adsorption,andseparation.Understandingthe crystallizationmechanismofSilicalite-1iscrucialforoptimizingits synthesisandtailoringitsproperties.Inthisstudy,solid-state nuclearmagneticresonance(NMR)spectroscopywasemployed toprobethehydrogenbond-inducedcrystallizationmechanismof Silicalite-1. Introduction: Silicalite-1isamicroporousaluminosilicatematerialwitha three-dimensionalframeworkstructurecomposedof interconnectedchannelsandcages.Itisclassifiedasamolecular sievezeoliteduetoitsabilitytoselectivelyadsorbmolecules basedontheirsizeandshape.Silicalite-1isoftensynthesized throughahydrothermalprocessinvolvingtheuseoforganic structure-directingagents(OSDAs)totemplatetheframework structure.Hydrogenbondingplaysacriticalroleinthe crystallizationofSilicalite-1,leadingtotheformationof well-definedandhighlyorderedcrystals. Methods: Solid-stateNMRspectroscopyisapowerfultechniquefor investigatingthelocalstructuralinformationanddynamicsof materialsattheatomiclevel.Inthisstudy,^1Hand^29SiNMR spectroscopywereusedtoexaminethehydrogenbond-induced crystallizationmechanismofSilicalite-1.Samplesatvariousstages ofthesynthesisprocesswerecharacterizedusingmagic-angle spinning(MAS)NMRtoobtaindetailedstructuralinformation. ResultsandDiscussion: The^1HMASNMRspectrarevealedthepresenceofvarious hydrogenbondingmotifsduringthesynthesisofSilicalite-1.The