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催化学报  2015 

LocationandorientationoftheN,N-diisopropylethylaminetemplatemoleculeintheAlPO4-18frameworkbyX-raysynchrotrondiffractionandmolecularmodelling

DOI: 10.1016/S1872-2067(14)60306-5, PP. 874-879

Keywords: Microporousmaterial,Smallpore,AlPO-18,Structure,Molecularmodeling,X-raydiffraction,Templatelocation

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Abstract:

?PhasepureAlPO4withtheAlPO4-18(AEI)structurewassynthesisedusingN,N-diisopropylethylamineasatemplate.UsingacombinationofX-raypowderdiffractionandcomputationalmethods,thelocationandorientationoftheN,N-diisopropylethylaminemoleculesinsidethecagesoftheAEIstructureweredetermined.Thermogravimetricanalysisconfirmedthatthenumberoftemplatemoleculesperunitcellwasconsistentwiththediffractionstudy.WeunequivocallyshowthatonlyonetemplatemoleculeispresentineachcageofthecrystallineAEImaterial.Ourworkdemonstratesthatacombinedapproachenablesaccuratestructureresolutionofsuchcomplexmaterials.

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