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Síntesis y espectro de dos fotones de una escuaraína sustituida por bis (porfirina)
Susan A Odom1, Scott Webster, Lazaro A Padilha
1School of Chemistry & Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA.
Journal of the American Chemical Society
|May 14, 2009
Resumen
Los investigadores sintetizaron un nuevo cromóforo utilizando el acoplamiento de Sonogashira. Esta molécula de zinc porfirina y squaraine muestra excepcionales propiedades de absorción de dos fotones en un amplio rango de longitudes de onda.
Área de la Ciencia:
- Química orgánica es la química orgánica.
- Ciencia de los materiales Ciencia de los materiales.
- La fotofísica es la fotofísica.
Sus antecedentes:
- Los cromóforos son esenciales para la recolección de luz y las aplicaciones optoelectrónicas.
- El desarrollo de moléculas con una fuerte absorción de dos fotones (TPA) es crucial para las tecnologías avanzadas.
Objetivo del estudio:
- Para sintetizar un nuevo cromóforo que vincule los donantes de porfirina de zinc con un núcleo de bis ((indolinylidenemethyl) squaraine.
- Para investigar las propiedades de absorción de dos fotones del cromóforo sintetizado.
Principales métodos:
- El acoplamiento de Sonogashira fue empleado para la síntesis del cromóforo.
- Se midieron espectros de absorción de dos fotones para caracterizar las propiedades fotofísicas.
Principales resultados:
- El cromóforo sintetizado exhibió un pico de absorción de dos fotones en la sección transversal de 11.000 GM.
- Se observó una sección transversal TPA inusualmente grande que superaba los 780 GM en una amplia ventana de longitud de onda de fotones de 750 nm.
Conclusiones:
- El nuevo cromóforo de zinc porfirina-cuadratina demuestra un potencial significativo para aplicaciones que requieren una absorción eficiente de dos fotones.
- La amplia ventana de absorción sugiere utilidad en áreas como la limitación óptica y la microfabricación 3D.
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