title: Triazine-Carbon Nanotubes: New Platforms for the Design of Flavin Receptors.
abstract: The synthesis of functionalised carbon nanotubes as receptors for riboflavin (RBF) is reported. Carbon nanotubes, both single-walled and multi-walled, have been functionalised with 1,3,5-triazines and p-tolyl chains by aryl radical addition under microwave irradiation and the derivatives have been fully characterised by using a range of techniques. The interactions between riboflavin and the hybrids were analysed by using fluorescence and UV/Vis spectroscopic techniques. The results show that the attached functional groups minimise the π-π stacking interactions between riboflavin and the nanotube walls. Comparison of p-tolyl groups with the triazine groups shows that the latter have stronger interactions with riboflavin because of the presence of hydrogen bonds. Moreover, the triazine derivatives follow the Stern-Volmer relationship and show a high association constant with riboflavin. In this way, artificial receptors in catalytic processes could be designed through specific control of the interaction between functionalised carbon nanotubes and riboflavin.
authors.affiliation: Departamento de Química Orgánica, Inorgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, IRICA Universidad de Castilla-La Mancha, Campus Universitario, 13071, Ciudad Real, Spain.|Dipartimento di Scienze Chimiche e Farmaceutiche Center of Excellence for Nanostructured Materials (CENMAT) & Italian Interuniversity Consortium on Materials Science and Technology (INSTM - Unit of Trieste), Università degli Studi di Trieste, Piazzale Europa 1, 34127, Trieste, Italy.
authors.forename: María Isabel
authors.initials: MI
authors.lastname: Lucío
authors.affiliation: Departamento de Química Orgánica, Inorgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, IRICA Universidad de Castilla-La Mancha, Campus Universitario, 13071, Ciudad Real, Spain.|Dipartimento di Scienze Chimiche e Farmaceutiche Center of Excellence for Nanostructured Materials (CENMAT) & Italian Interuniversity Consortium on Materials Science and Technology (INSTM - Unit of Trieste), Università degli Studi di Trieste, Piazzale Europa 1, 34127, Trieste, Italy.
authors.forename: Federica
authors.initials: F
authors.lastname: Pichler
authors.affiliation: Departamento de Química Orgánica, Inorgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, IRICA Universidad de Castilla-La Mancha, Campus Universitario, 13071, Ciudad Real, Spain.
authors.forename: José Ramón
authors.initials: JR
authors.lastname: Ramírez
authors.affiliation: Departamento de Química Orgánica, Inorgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, IRICA Universidad de Castilla-La Mancha, Campus Universitario, 13071, Ciudad Real, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: de la Hoz
authors.affiliation: Departamento de Química Orgánica, Inorgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, IRICA Universidad de Castilla-La Mancha, Campus Universitario, 13071, Ciudad Real, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Sánchez-Migallón
authors.affiliation: Dipartimento di Scienze Chimiche e Farmaceutiche Center of Excellence for Nanostructured Materials (CENMAT) & Italian Interuniversity Consortium on Materials Science and Technology (INSTM - Unit of Trieste), Università degli Studi di Trieste, Piazzale Europa 1, 34127, Trieste, Italy.
authors.forename: Caroline
authors.initials: C
authors.lastname: Hadad
authors.affiliation: Instituto de Física Universidad Autónoma de San Luis Potosí, Manuel Nava 6, Zona Universitaria, 78290, San Luis Potosí, SLP, Mexico.
authors.forename: Mildred
authors.initials: M
authors.lastname: Quintana
authors.affiliation: Dipartimento di Scienze Chimiche e Farmaceutiche Center of Excellence for Nanostructured Materials (CENMAT) & Italian Interuniversity Consortium on Materials Science and Technology (INSTM - Unit of Trieste), Università degli Studi di Trieste, Piazzale Europa 1, 34127, Trieste, Italy.
authors.forename: Angela
authors.initials: A
authors.lastname: Giulani
authors.affiliation: Dipartimento di Scienze Chimiche e Farmaceutiche Center of Excellence for Nanostructured Materials (CENMAT) & Italian Interuniversity Consortium on Materials Science and Technology (INSTM - Unit of Trieste), Università degli Studi di Trieste, Piazzale Europa 1, 34127, Trieste, Italy.|Instituto de Física Enrique Gaviola (CONICET) and FaMAF, Universidad Nacional de Córdoba Medina Allende s/n, X5000HUA, Córdoba, Argentina.
authors.forename: Maria Victoria
authors.initials: MV
authors.lastname: Bracamonte
authors.affiliation: Instituto de Catálisis y Petroleoquímica CSIC Cantoblanco, 28049, Madrid, Spain.
authors.forename: Jose L G
authors.initials: JL
authors.lastname: Fierro
authors.affiliation: Dipartimento di Scienze Chimiche e Farmaceutiche Center of Excellence for Nanostructured Materials (CENMAT) & Italian Interuniversity Consortium on Materials Science and Technology (INSTM - Unit of Trieste), Università degli Studi di Trieste, Piazzale Europa 1, 34127, Trieste, Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Tavagnacco
authors.affiliation: Departamento de Química Orgánica, Inorgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, IRICA Universidad de Castilla-La Mancha, Campus Universitario, 13071, Ciudad Real, Spain.
authors.forename: María Antonia
authors.initials: MA
authors.lastname: Herrero
authors.affiliation: Dipartimento di Scienze Chimiche e Farmaceutiche Center of Excellence for Nanostructured Materials (CENMAT) & Italian Interuniversity Consortium on Materials Science and Technology (INSTM - Unit of Trieste), Università degli Studi di Trieste, Piazzale Europa 1, 34127, Trieste, Italy.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Prato
authors.affiliation: Departamento de Química Orgánica, Inorgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, IRICA Universidad de Castilla-La Mancha, Campus Universitario, 13071, Ciudad Real, Spain. Ester.Vazquez@uclm.es.
authors.forename: Ester
authors.identifier: http://orcid.org/0000-0003-3223-8024
authors.initials: E
authors.lastname: Vázquez
mesh_terms: D002384:Catalysis; D006860:Hydrogen Bonding; D046529:Microscopy, Electron, Transmission; D008872:Microwaves; D037742:Nanotubes, Carbon / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D012256:Riboflavin / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013818:Thermogravimetry; D014227:Triazines / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D014227:Triazines; D012256:Riboflavin
keywords: donor-acceptor systems; molecular recognition; nanotubes; noncovalent interactions; receptors