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Capacidad de transferencia bidireccional de electrones en complejos de ftalosianina-Sc3N@I(h) -C80

Olga Trukhina1,2, Marc Rudolf3, Giovanni Bottari1,2

  • 1Department of Organic Chemistry, Universidad Autónoma de Madrid , Cantoblanco, 28049 Madrid, Spain.

Journal of the American Chemical Society
|September 25, 2015
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores crearon nuevos conjuntos de donantes y aceptadores de electrones utilizando los fullerenos Sc3N@I(h) -C80 y las ftalacianinas Zn(II). Estos materiales exhiben transferencia de electrones conmutables, actuando como aceptadores o donantes de electrones en función de la naturaleza electrónica de su contraparte.

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Área de la Ciencia:

  • Química supramolecular
  • Ciencias de los materiales
  • La fotoquímica

Sus antecedentes:

  • Los conjuntos donante-aceptante de electrones son cruciales para la conversión de energía y la electrónica molecular.
  • Los fullerenos y las ftaalocianinas son bloques de construcción versátiles para tales sistemas.
  • El control de la direccionalidad de transferencia de electrones es clave para el diseño de materiales avanzados.

Objetivo del estudio:

  • Síntesis y caracterización de nuevos conjuntos de donantes y receptores de electrones que incorporen el fullereno Sc3N@I(h) -C80 sustituido por N-piridil y las ftalacianinas Zn(II).
  • Investigar las propiedades fotofísicas y la dinámica de transferencia de electrones dentro de estos conjuntos.
  • Para demostrar el comportamiento de transferencia de electrones ajustable de un bloque de construcción basado en fullereno.

Principales métodos:

  • Síntesis de las fulleropirolidinas N-piridil-sustituidas Sc3N@I(h) -C80 y C60.
  • Coordinación axial de las fulleropirrolidinas a las ftalacianinas ricas en electrones y deficientes en electrones.
  • Ensayos fotofísicos, incluida la espectroscopia de estado estacionario y de resolución temporal.

Principales resultados:

  • Preparación exitosa de una serie de conjuntos de donante y receptor de electrones.
  • Observación de la transferencia de electrones fotoinducida desde Zn{\text{II}phthalocyanine} a Sc3N@I{\text{h}-C80 en un conjunto.
  • Observación de la transferencia de electrones fotoinducida de Sc3N@I(h) -C80 a Zn(II) ftalacianina en otro conjunto.
  • Demostración de la dicotomía de transferencia de electrones en el bloque de construcción Sc3N@I(h) -C80, regido por su contraparte.

Conclusiones:

  • El derivado del fullereno Sc3N@I(h) -C80 exhibe un comportamiento de aceptor/donante de electrones conmutable.
  • Esta dicotomía está controlada por las propiedades electrónicas de la ftalacianina Zn ((II) coordinadora.
  • Este trabajo representa un paso significativo hacia la creación de materiales moleculares con reactividad de transferencia de electrones sintonizables.