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Copias de fósforo de PPV: polímeros pi-conjugados y moléculas compuestas de fracciones alternas de fenileno y

Vincent A Wright¹, Brian O Patrick, Celine Schneider

¹Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada.

Journal of the American Chemical Society

|July 6, 2006

Resumen

Los investigadores sintetizaron una nueva clase de macromoléculas pi-conjugadas, los poli-p-fenilenofosfalicenos (PPPs), que son análogos de fósforo de los VPP. Estos nuevos polímeros exhiben una conjugación pi moderada y propiedades electrónicas sintonizables, allanando el camino para nuevos materiales.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Química de Polímeros La Química de Polímeros es la química de los polímeros.
Electrónica orgánica y electrónica orgánica.

Sus antecedentes:

El poli (p-fenileno vinileno) (PPV) es un polímero pi-conjugado clave utilizado en la electrónica orgánica.
Existe la necesidad de nuevas macromoléculas conjugadas con propiedades electrónicas sintonizables.
Los análogos de materiales establecidos que contienen fósforo pueden ofrecer características únicas.

Objetivo del estudio:

Para sintetizar y caracterizar una nueva clase de macromoléculas pi-conjugadas: poli (p) -fenilenofosfalqueno (PPP).
Investigar las propiedades estructurales y electrónicas de los PPP y sus compuestos modelo.
Explorar el potencial de las PPP como alternativas a los polímeros conjugados tradicionales.

Principales métodos:

Síntesis de PPP y compuestos modelo utilizando la reacción de Becker entre sililfosfinas bifuncionales y cloruros diacídicos.
Caracterización de compuestos sintetizados utilizando cristalografía de rayos X y espectroscopia UV/Vis.
Análisis de la formación de isómeros (selectividad E/Z) y la extensión de la conjugación pi.

Principales resultados:

Síntesis exitosa de poli (p-fenilenofosfaliceno) s (PPP) y varios compuestos modelo.
Observación de la formación selectiva de isómeros Z en PPPs con sustitutos de P voluminosos.
Las estructuras de rayos X indican una conjugación pi moderada con diferentes ángulos de torsión.
La espectroscopia UV / Vis confirma la conjugación pi extendida, mostrando desplazamientos al rojo en la absorbancia de polímeros y compuestos modelo específicos.

Conclusiones:

Los poli (p-fenilenofosfalicenos) representan una nueva clase de macromoléculas pi-conjugadas con potencial en la ciencia de los materiales.
La ruta sintética permite el control de la formación de isómeros, influyendo en las propiedades estructurales y electrónicas.
La conjugación pi observada y las propiedades espectrales sugieren que estos materiales son prometedores para aplicaciones electrónicas.

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