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Fotosensibilización de capas metálicas orgánicas para la reducción eficiente de dióxido de carbono impulsada por la

Guangxu Lan¹, Zhe Li^1,2, Samuel S Veroneau¹

¹Department of Chemistry , The University of Chicago , 929 E 57th Street , Chicago , Illinois 60637 , United States.

Journal of the American Chemical Society

|September 18, 2018

Resumen

Las nuevas capas metalorgánicas (MOL) convierten eficientemente el CO2 en combustible utilizando la luz. Estos materiales 2D avanzados integran fotosensibilizadores y catalizadores para la fotosíntesis artificial, logrando altos números de rotación bajo luz visible y luz solar.

Área de la Ciencia:

Ciencias de los materiales
Química
Nanotecnología

Sus antecedentes:

Las capas orgánicas metálicas (MOL) son materiales 2D emergentes derivados de marcos orgánicos metálicos (MOF).
Los MOL ofrecen potencial para diversas aplicaciones debido a su estructura y propiedades únicas.

Objetivo del estudio:

Diseñar y sintetizar nuevas capas metalorgánicas fotosensibilizantes (MOL) para una reducción fotocatalítica eficiente del CO2.
Investigar la integración de fotosensibilizadores y catalizadores dentro de una plataforma MOL para la fotosíntesis artificial.

Principales métodos:

Diseño de MOL de Hf12-Ru utilizando unidades de construcción secundarias de Hf12 (SBU) y ligandos derivados de [Ru(bpy) 3+
Modificación de las MOL con moléculas de captura M(bpy) ((CO) 3X (M = Re, Mn) a través de reacciones de intercambio de carboxilato.
Caracterización de la actividad fotocatalítica de reducción de CO2 bajo luz artificial visible y luz solar.

Principales resultados:

Desarrollado Hf12-Ru-Re y Hf12-Ru-Mn MOLs que incorporan fotosensibilizadores y catalizadores.
Se logra una transferencia eficiente de electrones desde el fotosensibilizador a los centros catalíticos debido a la proximidad (1-2 nm).
Se obtienen altas cifras de reducción de CO2: 8613 bajo luz artificial y 670 bajo luz solar.

Conclusiones:

Las capas metálico-orgánicas (MOL) proporcionan una plataforma versátil para ensamblar materiales multifuncionales.
Este trabajo demuestra el potencial de las MOL para avanzar en la investigación de la fotosíntesis artificial.
Los MOL diseñados muestran una promesa significativa para una reducción eficiente de CO2 impulsada por la luz.

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