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Los arylazopirazoles como interruptores moleculares sensibles a la luz en sistemas supramoleculares basados en

Lucas Stricker¹, Eva-Corinna Fritz¹, Martin Peterlechner²

¹Organic Chemistry Institute and Center for Soft Nanoscience, Westfälische Wilhelms-Universität Münster , Corrensstrasse 40, 48149 Münster, Germany.

Journal of the American Chemical Society

|March 15, 2016

Resumen

Los investigadores desarrollaron arylazopyrazoles solubles en agua (AAP) como interruptores moleculares sintonizables. Estos AAP forman complejos que responden a la luz con las ciclodextrinas, mostrando potencial para sistemas fotorresponsivos avanzados.

Área de la Ciencia:

Química supramolecular
Síntesis orgánica
La fotoquímica

Sus antecedentes:

Los arilazopirazoles (AAP) son una clase de compuestos orgánicos con aplicaciones potenciales como interruptores moleculares.
El ajuste de las propiedades fotofísicas de los AAP es crucial para el desarrollo de materiales sensibles a la luz.
La complejación huésped-huésped con ciclodextrinas ofrece una ruta para crear sistemas supramoleculares avanzados.

Objetivo del estudio:

Para sintetizar arylazopirazoles solubles en agua (AAP) con propiedades fotofísicas ajustables.
Para investigar la complejación huésped-huésped de AAP con β-ciclodextrina (β-CD).
Demostrar el potencial de las AAP en sistemas supramoleculares sensibles a la luz.

Principales métodos:

Síntesis de alto rendimiento de arylazopirazoles funcionalizados solubles en agua.
Caracterización fotofísica y ajuste de las propiedades AAP a través de la modificación estructural.
Formación y análisis de complejos anfitrión-invitado entre AAP y β-ciclodextrina.
Investigación de sistemas supramoleculares mediante el uso de vesículas de ciclodextrina (CDV) y nanopartículas de oro (CDAuNPs).

Principales resultados:

Se logró una síntesis sencilla y de alto rendimiento de PAA solubles en agua.
Las propiedades fotofísicas, incluidos los estados fotoestacionarios, eran sintonizables a través de modificaciones estructurales.
Los AAP formaron complejos huésped-invitado estables y sensibles a la luz con β-CD, exhibiendo altas afinidades de unión y una mejor estabilidad del isómero Z en comparación con los azobenzenos.
Agregación/dispersión reversible y sensible a la luz demostrada en sistemas supramoleculares basados en CD (CDV y CDAuNP).

Conclusiones:

Los arilazopirazoles (AAP) son interruptores moleculares versátiles con propiedades fotofísicas ajustables.
Los AAP muestran un potencial significativo para su integración en sistemas supramoleculares fotorresponsivos avanzados y multivalentes.
Los AAP desarrollados ofrecen ventajas en la eficiencia de conmutación y la estabilidad térmica para aplicaciones controladas por luz.

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