title: UV-polymerized butyl methacrylate monoliths with embedded carboxylic single-walled carbon nanotubes for CEC applications.
abstract: The preparation of polymeric monoliths with embedded carboxy-modified single-walled carbon nanotubes (c-SWNTs) and their use for capillary electrochromatography (CEC) is described. Carbon nanotube composites were obtained by preparing a polymerization mixture in the presence of increasing c-SWNT concentrations, followed by UV initiation. The novel stationary phases were studied by optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. Using short UV-polymerization times, the optimized porogenic solvent (a binary mixture of 1,4-butanediol and 2-propanol) gave rise to polymeric beds with homogenously dispersed embedded c-SWNTs. The CEC features of these monoliths were evaluated using polycyclic aromatic hydrocarbons (PAHs), non-steroidal anti-inflammatory drugs (NSAIDs) and chiral compounds. The monolith prepared in the presence of c-SWNTs showed enhanced resolution of the text mixtures, including a remarkable capability to separate enantiomers.
authors: Department of Analytical Chemistry, University of Valencia, 46100, Valencia, Spain, manapas2@uv.es.
authors: María
authors: M
authors: Navarro-Pascual-Ahuir
authors: Rafael
authors: R
authors: Lucena
authors: Soledad
authors: S
authors: Cárdenas
authors: Guillermo
authors: G
authors: Ramis-Ramos
authors: Miguel
authors: M
authors: Valcárcel
authors: José Manuel
authors: JM
authors: Herrero-Martínez
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry*; D053801:Capillary Electrochromatography / Q000295:instrumentation / Q000379:methods*; D008689:Methacrylates / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry*; D058105:Polymerization / Q000528:radiation effects; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D013237:Stereoisomerism; D014466:Ultraviolet Rays
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D008689:Methacrylates; D037742:Nanotubes, Carbon; D011084:Polycyclic Aromatic Hydrocarbons; D011108:Polymers; C016284:butyl methacrylate