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Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain
Published on: December 12, 2017
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Control de redox de los modos de unión de un receptor orgánico
Marco Frasconi1, Isurika R Fernando1, Yilei Wu1,2
1Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|August 4, 2015
Resumen
Los procesos de redox pueden controlar la formación de complejos huésped-huésped en ciclófanos. Cambiar el ciclófano
Área de la Ciencia:
- Química supramolecular
- Procesos químicos de redox
- Química entre anfitrión y huésped
Sus antecedentes:
- Las interacciones no covalentes son fundamentales en biología y ciencia supramolecular.
- La modulación redox ofrece una vía para controlar estas interacciones.
Objetivo del estudio:
- Para demostrar el control redox sobre la formación de complejos de inclusión huésped-huésped utilizando ciclófanos.
- Investigar los cambios en las propiedades estereoelectrónicas y de unión de los ciclofanos tras la manipulación redox.
Principales métodos:
- Cálculos de la mecánica cuántica para determinar la energía de la formación compleja.
- Difracción de rayos X de un solo cristal para confirmar la formación del complejo de inclusión.
- Probando las interacciones huésped-huésped con huéspedes pobres en electrones.
Principales resultados:
- El estado redox del ciclófano dicta los modos de unión: las interacciones donante-aceptante (oxidadas) frente a las interacciones de van der Waals (reducidas).
- La reducción de cuatro electrones de ciclóbis ((paraquat-p-fenileno) altera significativamente las propiedades de unión.
- Se observaron propiedades donantes de electrones del ciclófano reducido.
Conclusiones:
- La química anfitrión-invitado con conmutación de redox se puede lograr con los ciclofanos.
- Los hallazgos apoyan las aplicaciones en electrónica molecular y catálisis.
- Potencial para nuevas moléculas mecánicamente entrelazadas con geometrías controladas por redox.
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