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1、Metal–OrganicFrameworksTeamMembers:CaoChangFuChuXianReporter:DuMengYuanPublishedonNatureReviewsMaterialsCONTENTSIntroduction1Stabilityofmetal–organicframeworks2MOFstabilityincatalyticsystems3Futureperspectives4Introduction1Metal–organicframeworks(MOFs)areascientificallycompelli
2、ngandfunctionallyevolvingclassofmeso-,micro-andultramicroporousmaterials.MOFstructuresencompassdozensoftopologies,includingseveral,suchassodaliteandRho,thatarealsowellknownforzeolites.MOFshavebeenexploredformanyapplicationsincluding,butnotlimitedto,gasstorageandrelease,chemical
3、separations,drugdelivery,catalysis,lightharvestingandenergyconversion,and,recently,thedegradationoftoxicsubstancessuchaschemicalwarfareagentsMOFsarecomposedofmetalnodesandorganiclinkersthatcanbesystematicallytunedintermsofchemicalcompositionandprecisearrangement—anattributethat
4、differsfrompurelyinorganiczeolites,whichconsistlargelyofsiliconoraluminiumionslinkedbyoxygenatoms.Inrecentyears,thenumberanddiversityofMOFstructureshavegrownsignificantly,andmanywater-stableandthermallystableMOFsnowexist,Enablinganexcitingexpansionoftheirapplication.Dependingon
5、theapplicationenvisaged,differentfunctionalstabilitiesareimportant.Stabilityofmetal–organicframeworks2Stabilityisdefinedasresistanceofthestructuretodegradation.However,anotherpossibledefinitionisthermodynamicinorigin:manyfunctionallystableMOFs(aswellaszeolites)arethermodynamica
6、llyunstablewithrespecttoalternative—typically,denser—polymorphs.AnactiveareaofMOFresearchisthedevelopmentofroutestothermodynamicallyunstable,butfunctionallystable,polymorphs.Chemicalstability12Thermalstability3Hydrothermalstability4MechanicalstabilityStabilityofmetal–organicfra
7、meworks1ChemicalstabilityThegreatestconcernsfortheimprovementofMOFchemicalstabilityhavebeenlargelyrelatedtoliquidwaterandwatervapour;accordingly,wefocusonaqueoussolutions.InmostMOFstructures,thechemicalweakpointsareatthenodes—morespecifically,themetal–linkerbonds—withhydrolysis
8、yieldingaprotonatedlinkerandahydroxide(orwater)ligated
