title: Molecular assembly of multi-wall carbon nanotubes with amino crown ether: synthesis and characterization.
abstract: Synthetic methodology and physicochemical characterization of multi-wall carbon nanotubes (MWCNTs) functionalized with a crown ether molecule is reported. The MWCNTs were synthesized by spray pyrolysis technique using toluene as carbon source and ferrocene as catalyst. The nanotubes were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Oxidation of MWCNTs was carried out by 8 h of sonication in a mixture of sulfuric and nitric acid (3:1). The MWCNT-COOH was amidated with 4-aminobenzo-15-crown-5 under mild reaction conditions using N,N'-dicyclohexylcarbodiimide and dimethylaminopyridine as catalyst and dimethylformamide as solvent, at room temperature for 24 h. The amidation product was characterized by scanning electron microscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy and a mass spectrometry study to determine the fragmentation pattern being m/z 309, 177 and 149 the most important ions.
authors.affiliation: Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Ave. Calzada Tecnológico 14418 Mesa de Otay, Tijuana, CP 22390, BC, México.
authors.forename: J P
authors.initials: JP
authors.lastname: Camarena
authors.forename: H
authors.initials: H
authors.lastname: Espinoza-Gómez
authors.forename: R
authors.initials: R
authors.lastname: Somanathan
authors.forename: H
authors.initials: H
authors.lastname: Tiznado
authors.forename: E
authors.initials: E
authors.lastname: Vélez-López
authors.forename: R
authors.initials: R
authors.lastname: Romero-Rivera
authors.forename: M A
authors.initials: MA
authors.lastname: Martínez-López
authors.forename: M
authors.initials: M
authors.lastname: Avalos-Borja
authors.forename: A
authors.initials: A
authors.lastname: Bek
authors.forename: G
authors.initials: G
authors.lastname: Alonso-Nuñez
authors.forename: E
authors.initials: E
authors.lastname: Rogel-Hernández
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D047248:Crown Compounds / Q000737:chemistry*; D013058:Mass Spectrometry; D018625:Microscopy, Atomic Force; D046529:Microscopy, Electron, Transmission; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D014050:Toluene; D043844:Crown Ethers
chemical_list: D000814:Aniline Compounds; D047248:Crown Compounds; D037742:Nanotubes, Carbon; D014050:Toluene; C526639:4'-aminobenzo-15-crown-5; D043844:Crown Ethers