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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
La naturaleza transportadora de electrones o de agujeros seleccionada por la geometría de apilamiento π dirigida por
Tsuneaki Sakurai1, Kentaro Tashiro, Yoshihito Honsho
1School of Engineering, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan.
Journal of the American Chemical Society
|April 12, 2011
Resumen
Se sintetizaron nuevos semiconductores cristalinos líquidos a partir de complejos de cobre de dimeros de porfirina fusionados. Estos materiales exhiben comportamientos semiconductores distintos de tipo n y tipo p basados en sus estructuras de cadena lateral.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Electrónica orgánica y electrónica orgánica.
- Química supramolecular de las moléculas.
Sus antecedentes:
- Los semiconductores de cristal líquido (LC) ofrecen propiedades únicas de autoensamblaje para aplicaciones electrónicas.
- Los dímeros de porfirina son núcleos electroactivos prometedores debido a su extendida conjugación π.
Objetivo del estudio:
- Para sintetizar nuevos semiconductores cristalinos líquidos basados en dímeros de porfirina de cobre con cadenas laterales a medida.
- Investigar la influencia de la arquitectura de la cadena lateral en las propiedades de autoensamblaje y transporte de carga de estos materiales.
Principales métodos:
- Síntesis de complejos de cobre de dimero de porfirina fundido con cadenas laterales dodecilo y semifluoroalquilo (PP(hetero)) y solo cadenas laterales semifluoroalquilo (PP(homo)).
- Caracterización de las mesofasas cristalinas líquidas formadas por estos complejos.
- Mediciones de fotocorriente transitoria en condiciones de tiempo de vuelo para evaluar las propiedades de transporte de carga.
Principales resultados:
- PP(hetero) formó mesofasas LC columnares rectangulares, mientras que PP(homo) formó mesofasas LC ortorrómbicas.
- A pesar de las propiedades electrónicas de estado de solución similares, PP(hetero) exhibió un comportamiento semiconductor de tipo n.
- PP(homo) demostró un comportamiento semiconductor de tipo p en el estado LC.
Conclusiones:
- La ingeniería de la cadena lateral de semiconductores LC basados en porfirina puede controlar con precisión sus características de autoensamblaje y transporte de carga.
- Las distintas geometrías de apilamiento en diferentes mesofasas de LC conducen a propiedades semiconductoras complementarias de tipo n y tipo p.
- Estos hallazgos abren caminos para desarrollar circuitos lógicos ambipolares o complementarios utilizando materiales de LC basados en porfirina a medida.
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