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Síntesis de un nanocono de carbono por anulación en cascada

Kazutaka Shoyama¹, Frank Würthner^1,2

¹Institut für Organische Chemie , Universität Würzburg , Am Hubland , 97074 Würzburg , Germany.

Journal of the American Chemical Society

|August 6, 2019

Resumen

Los científicos sintetizaron el primer nanocono de carbono, una estructura única de cono de grafito, utilizando el acoplamiento cruzado catalizado por el paladio. Este avance abre nuevas vías para crear nuevos alótropos de carbono con propiedades personalizadas.

Área de la Ciencia:

Ciencias de los materiales
Química orgánica
Nanotecnología

Sus antecedentes:

Los conos grafíticos se observaron por primera vez hace más de 50 años a través de la pirólisis del carbono.
La síntesis de alótropos de carbono como los conos grafíticos ha seguido siendo un desafío significativo en la ciencia de los materiales.

Objetivo del estudio:

Para reportar la primera síntesis exitosa de un nanocono de carbono.
Caracterizar la estructura y las propiedades de este nuevo alótropo de carbono.

Principales métodos:

Reacción de acoplamiento cruzado catalizada por paladio.
Se utilizan fracciones de dicarboximida de coranuleno y naftaleno.
Utilizó una cascada de [3 + 3] y [4 + 2] anulaciones para construir 15 bonos C-C.

Principales resultados:

Con éxito sintetizó un nanocono de carbono compuesto de un pentágono rodeado por 30 hexágonos.
Confirmó la geometría cónica usando la cristalografía de rayos X.
Propiedades ópticas y electrónicas elucidadas mediante UV/vis, espectroscopia de fluorescencia y voltametría cíclica.

Conclusiones:

Este estudio presenta la primera ruta sintética para los nanoconos de carbono.
El método desarrollado permite la construcción de alótropos de carbono complejos.
Las propiedades caracterizadas allanan el camino para aplicaciones potenciales en nanotecnología.

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