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Síntesis de abajo hacia arriba de las nanocintas de grafeno quiral dopadas con heteroátomos
Xiao-Ye Wang1, José I Urgel2, Gabriela Borin Barin2
1Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany.
Journal of the American Chemical Society
|July 11, 2018
Resumen
Los investigadores sintetizaron las primeras cintas quirales (4,1)-grafeno dopadas con un nuevo precursor. Estas nanocintas únicas exhiben autoensamblaje específico de los bordes, formando matrices ordenadas.
Área de la Ciencia:
- Ciencias de los materiales
- Nanotecnología
- Química orgánica
Sus antecedentes:
- La síntesis de abajo hacia arriba de las nanocintas de grafeno (GNR) ha avanzado, ofreciendo propiedades sintonizables.
- La síntesis de los GNR quirales sigue siendo poco explorada, limitada a las estructuras (3,1)-GNR.
Objetivo del estudio:
- Informe de la síntesis asistida por superficie de las primeras GNR quirales (4,1) dopadas con heteroátomos.
- Investigar el comportamiento de autoensamblaje de estos nuevos GNR quirales.
Principales métodos:
- Se utilizó un precursor diseñado racionalmente: 6,16-dibromo-9,10,19,20-tetraoxa-9a,19a-diboratetrabenzo[a,f,j,o]perileno.
- Caracterizó los GNR sintetizados utilizando microscopía de túnel de barrido, microscopía de fuerza atómica sin contacto y espectroscopia Raman.
- Se utilizó un modelo teórico para verificar la estructura de los GNR quirales.
Principales resultados:
- Se han sintetizado con éxito los quirales (4,1)-GNR heteroatómicamente dopados.
- Se observa un autoensamblaje lateral impulsado por segmentos de oxígeno-boro-oxígeno (OBO) en los bordes del GNR.
- Se han logrado matrices de GNR bien alineadas con conjuntos entre cintas homoquirales y heteroquirales.
Conclusiones:
- Demostró una nueva vía para sintetizar nanocintas quirales complejas.
- Destacó el papel de la funcionalidad de borde en la dirección del autoensamblaje de GNR.
- Se abrieron posibilidades para crear estructuras ordenadas de nanocintas con quiralidad controlada.
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