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Título:
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CarbonNanotubesConjugatedwithTriazole-BasedTetrathiafulvalene-TypeReceptorsfor C60Recognition
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Autores:
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Mateos Gil, Jaime ;
Calbo, Joaquín ;
Rodríguez Perez, Laura ;
Herranz, M.Angeles ;
Ortí, Enrique ;
Martín, Nazario
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Tipo de documento:
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texto impreso
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Editorial:
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Wiley-VCH, 2019
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Química: Química orgánica
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Tipo = Artículo
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Resumen:
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Fullerene receptors prepared by a twofold CuI -catalyzed azide-alkyne cycloaddition (CuAAC) reaction with ?-extended tetrathiafulvalene (exTTF) have been covalently linked to singlewalled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). The nanoconjugates obtained were characterized by several analytical, spectroscopic and microscopic techniques (TEM, FTIR, Raman, TGA and XPS), and evaluated as C60 receptors by UV-Vis spectroscopy. The complexation between the exTTF-triazole receptor in the free state and C60 was also studied by UV-Vis and 1 H NMR titrations, and compared with analogous triazole-based tweezer-type receptors containing the electron-acceptor 11,11,12,12-tetracyano-9,10-anthraquinodimethane (TCAQ) and benzene rings instead of exTTF motifs, providing in all cases very similar values for the association constant (log Ka ? 3.0?3.1). Theoretical density functional theory (DFT) calculations demonstrated that the enhanced interaction between the host and the guest upon increasing the size of the ?-conjugated arms of the tweezer is compensated by an increase in the energy penalty needed to distort the geometry of the host to wrap C60.
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En línea:
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https://eprints.ucm.es/id/eprint/58514/1/Preprint-ChemPlusChem-2019-84-730%20Nazario.pdf
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