title: Synthesis and Characterization of Germanium Coordination Compounds for Production of Germanium Nanomaterials.
abstract: A series of novel germanium(II) precursors was synthesized to initiate an investigation between the precursors' structures and the morphologies of the resulting nanoparticles. The precursors were synthesized from the reaction of Ge[N(SiMe3)2]2or [Ge(OBut)2]2and the appropriate ligand: N,N'-dibenzylethylenediamine (H2-DBED),tert-butanol (H-OBut), 2,6-di-methyl phenol (H-DMP), 2,6-di-phenyl phenol (H-DPP),tert-butyldimethylsilanol (H-DMBS), triphenylsilanol (H-TPS), triphenylsilanethiol (H-TPST), and benzenethiol (H-PS). The products were identified as: [Ge(μc-DBED)]2(1, μc= bridging chelating), [Ge(μ-DMP)(DMP)]2(2), Ge(DPP)2(3), [Ge(μ-OBut)(DMBS)]2, (4), [Ge(μ-DMBS)(DMBS)]2(5), Ge(TPS)3(H) (6), [Ge(μ-TPST)(TPST)]2(7), and Ge(PS)4(8). The Ge(II) metal centers were found to adopt a pyramidal geometry for1, 2, 4, 5, 7, a bent arrangement for3, and a tetrahedral coordination for the Ge(IV) species6and8. Using a simple solution precipitation methodology, Ge(0) nanomaterials were isolated as dots and wires for the majority of precursors. Compound7led to the isolation of amorphous GexSy. The nanomaterials isolated were characterized by TEM, EDS, and powder XRD. A correlation between the precursor's arrangement and final observed nanomorphology was proffered as part of the 'precursor structure affect' phenomenon.
authors.affiliation: Sandia National Laboratories, Advanced Materials Laboratory, 1001 University Boulevard SE, Albuquerque, New Mexico, 87106.
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Boyle
authors.forename: Louis J
authors.initials: LJ
authors.lastname: Tribby
authors.forename: Leigh Anna M
authors.initials: LA
authors.lastname: Ottley
authors.forename: Sang M
authors.initials: SM
authors.lastname: Han
keywords: Germanium; alkoxides; amides; crystal structure; nanomaterials; thiols
references.citation: Chemistry. 2006 Jan 23;12(4):1162-73
references.pmid: 16250060
references.citation: IEEE Trans Nanobioscience. 2006 Dec;5(4):222-30
references.pmid: 17181020
references.citation: Angew Chem Int Ed Engl. 2002 Dec 16;41(24):4783-6
references.pmid: 12481357
references.citation: J Am Chem Soc. 2002 Feb 20;124(7):1424-9
references.pmid: 11841311
references.citation: J Am Chem Soc. 2006 Apr 19;128(15):5244-50
references.pmid: 16608360
references.citation: J Am Chem Soc. 2004 Dec 1;126(47):15466-72
references.pmid: 15563174
references.citation: Inorg Chem. 2005 Apr 18;44(8):2774-80
references.pmid: 15819565
references.citation: J Am Chem Soc. 2007 Aug 8;129(31):9746-52
references.pmid: 17629271
references.citation: Science. 1998 Jan 9;279(5348):208-11
references.pmid: 9422689
references.citation: Angew Chem Int Ed Engl. 2006 Jun 26;45(26):4349-52
references.pmid: 16758494
references.citation: Nature. 2002 Nov 7;420(6911):57-61
references.pmid: 12422212
references.citation: Small. 2007 Apr;3(4):691-9
references.pmid: 17299826
references.citation: Inorg Chem. 2007 Sep 3;46(18):7579-86
references.pmid: 17691771
references.citation: Angew Chem Int Ed Engl. 2004 Dec 27;44(2):281-4
references.pmid: 15614897
references.citation: Inorg Chem. 2005 Mar 7;44(5):1309-18
references.pmid: 15732971
references.citation: Chem Commun (Camb). 2005 Apr 14;(14):1914-6
references.pmid: 15795786
references.citation: J Am Chem Soc. 2001 Nov 14;123(45):11162-7
references.pmid: 11697959
references.citation: Phys Rev B Condens Matter. 1992 Dec 15;46(23):15578-15581
references.pmid: 10003694
references.citation: Angew Chem Int Ed Engl. 2006 Apr 10;45(16):2602-5
references.pmid: 16534820