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El ligando de azobenzeno altamente retorcido hace que los cristales rueden continuamente a la luz solar

Amymarie K Bartholomew¹, Ilana B Stone¹, Michael L Steigerwald¹

¹Department of Chemistry, Columbia University, New York, New York 10027, United States.

Journal of the American Chemical Society

|September 9, 2022

Resumen

La energía solar alimenta directamente el movimiento de los cristales. Los nuevos cristales de cobre azobenzeno ruedan continuamente bajo la luz solar, demostrando una eficiente conversión de energía solar a mecánica.

Área de la Ciencia:

Ciencias de los materiales
La fotoquímica
Nanotecnología

Sus antecedentes:

La conversión directa de la energía solar en trabajo mecánico ofrece una mayor eficiencia que los métodos indirectos.
El desarrollo de materiales para una respuesta fotomecánica rápida, proporcional y duradera es crucial para las futuras soluciones energéticas.

Objetivo del estudio:

Introducir un nuevo material fotomecánico capaz de convertir directamente la energía solar en mecánica.
Para demostrar el movimiento continuo en los cristales impulsados únicamente por la radiación solar.

Principales métodos:

Síntesis de un complejo tetraédrico de isocyanoazobenzeno y cobre.
Irradiación de los cristales sintetizados con luz blanca de amplio espectro, incluida la luz solar.
Análisis del movimiento del cristal y su correlación con el estímulo de la luz y la isomerización molecular.

Principales resultados:

Los cristales del complejo isocyanoazobenzeno-cobre exhibieron un movimiento de rodadura continuo tras la irradiación.
El movimiento fue impulsado por la isomerización inducida por luz azul del ligando azobenzeno, causando la flexión y el enderezamiento del cristal.
Demostró la conversión directa de la energía solar en movimiento físico continuo.

Conclusiones:

El empaque de cristales geométricamente restringido es una estrategia viable para afinar las propiedades electrónicas de los cromóforos.
El sistema molecular desarrollado proporciona una vía directa para la conversión de la energía solar al movimiento mecánico.
Esta investigación ofrece una nueva herramienta para soluciones energéticas que utilizan sistemas moleculares accesibles.

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