Funcionalización de materiales nanoestructurados de carbono y estudio de sus propiedades
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2018-02-27
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Jaén: Universidad de Jaén
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[ES] En este trabajo se ha llevado a cabo la funcionalización no covalente de nanotubos de carbono multicapa grafitizados (NTg) por adsorción irreversible del receptor iónico, ácido (2S,2'S)-2,2'-[{2-amino-5- nitrosopirimidina-4,6-diil)diimino]Bis[3-{1H-imidazol-4-il)]propanoico, (R). La interacción R-NTg se produce principalmente por interacciones de re-re stacking entre los centros arénicos de NTg y el núcleo aromático de nitrosopirimidina de R. Las condiciones experimentales para llevar a cabo la funcionalización se establecieron a partir del estudio de la adsorción y desorción de R sobre NTg, en disolución acuosa, a 2SºC y pH S.
Se han estudiado las propiedades adsorbentes de los NTg funcionalizados (NTg-R) frente a Cu2+ y Pd2\ mediante la obtención de las isotermas de adsorción a 2SºC y pH S. El material NTg-R muestra una importante mejora de la capacidad de adsorción de los iones metálicos respecto a NTg. Esto confirma que se ha producido transferencia de las propiedades complejantes de las funciones de R a la superficie de los NTg.
[EN] The purpose of this project is the non-covalent functionalization of graphitized multilayer carbon nanotubes (NTg) by irreversible adsorption of the ionic receptor, (2S,2'S)-2,2' -[(2-amino-5-nitrosopyrimidine-4,6-diyl)diimino]Bis[3-{1H-imidazol-4-yl)] propanoic acid, (R). The interaction R-NTg occurs mainly by re-re stacking interactions between the arene centers of NTg and the aromatic nitrosopyrimidine nucleus of R. The experimental conditions to carry out the functionalization were established from the study of the adsorption and desorption of Ron NTg, in aqueous solution, at 25ºC and pH 5. The adsorbent properties of the functionalized NTg (NTg-R) versus Cu2+ and Pd2+ have been studied by obtaining the adsorption isotherms at 25ºC and pH 5. The NTg-R material shows a significant improvement in the adsorption capacity of the metal ions with respect to NTg. This confirms that transference of the complexing properties of the R functions to the surface of the NTg has occurred.
[EN] The purpose of this project is the non-covalent functionalization of graphitized multilayer carbon nanotubes (NTg) by irreversible adsorption of the ionic receptor, (2S,2'S)-2,2' -[(2-amino-5-nitrosopyrimidine-4,6-diyl)diimino]Bis[3-{1H-imidazol-4-yl)] propanoic acid, (R). The interaction R-NTg occurs mainly by re-re stacking interactions between the arene centers of NTg and the aromatic nitrosopyrimidine nucleus of R. The experimental conditions to carry out the functionalization were established from the study of the adsorption and desorption of Ron NTg, in aqueous solution, at 25ºC and pH 5. The adsorbent properties of the functionalized NTg (NTg-R) versus Cu2+ and Pd2+ have been studied by obtaining the adsorption isotherms at 25ºC and pH 5. The NTg-R material shows a significant improvement in the adsorption capacity of the metal ions with respect to NTg. This confirms that transference of the complexing properties of the R functions to the surface of the NTg has occurred.