title: Postfunctionalization of periodic mesoporous silica SBA-1 with magnesium(II) and iron(II) silylamides.
abstract: Magnesium silylamide complexes Mg[N(SiHMe(2))(2)](2)(THF)(2) and Mg[N(SiPhMe(2))(2)](2) were synthesized according to transsilylamination and alkane elimination protocols, respectively, utilizing Mg[N(SiMe(3))(2)](2)(THF)(2) and [Mg(n-Bu)](2) as precursors. Cage-like periodic mesoporous silica SBA-1 was treated with donor solvent-free dimeric [Mg{N(SiHMe(2))(2)}(2)](2), [Mg{N(SiMe(3))(2)}(2)](2) and monomeric Mg[N(SiPhMe(2))(2)](2), producing hybrid materials [Mg(NR(2))(2)]@SBA-1 with magnesium located mainly at the external surface. Consecutive grafting of [Mg{N(SiHMe(2))(2)}(2)](2) and [Fe(II){N(SiHMe(2))(2)}(2)](2) onto SBA-1 led to heterobimetallic hybrid materials which exhibit complete consumption of the isolated surface silanol groups, evidencing intra-cage surface functionalization. All materials were characterized by DRIFT spectroscopy, nitrogen physisorption and elemental analysis.
authors.affiliation: Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Deschner
authors.forename: Michael
authors.initials: M
authors.lastname: Klimpel
authors.forename: Maxim
authors.initials: M
authors.lastname: Tafipolsky
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Scherer
authors.forename: Karl W
authors.initials: KW
authors.lastname: Törnroos
authors.forename: Reiner
authors.initials: R
authors.lastname: Anwander
mesh_terms: D000577:Amides / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D000577:Amides; D009942:Organometallic Compounds; D012822:Silicon Dioxide; D007501:Iron; D008274:Magnesium