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La inclusión de los radicales tiazil en los materiales cristalinos porosos
Storm V Potts1, Leonard J Barbour, Delia A Haynes
1Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, United Kingdom, CB2 1EW.
Journal of the American Chemical Society
|July 23, 2011
Resumen
Los radicales benzodithiazolyl (BDTA) y methylbenzodithiazolyl (MBDTA) se incorporan selectivamente en los marcos porosos MIL53 (((Al). Estas moléculas invitadas se pueden eliminar fácilmente utilizando disolvente de diclorometano.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química Química es la química.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- Los marcos híbridos porosos ofrecen propiedades sintonizables para la encapsulación molecular.
- La difusión de la fase gaseosa es un método para incorporar moléculas invitadas en los marcos de acogida.
- La comprensión de las interacciones huésped-marco es crucial para el diseño de materiales funcionales.
Objetivo del estudio:
- Investigar la incorporación selectiva de los radicales benzodithiazolyl (BDTA) y methylbenzodithiazolyl (MBDTA) en las estructuras híbridas porosas.
- Determinar los motivos estructurales de BDTA y MBDTA dentro del marco MIL53.
- Para evaluar las características de liberación de las moléculas invitadas incorporadas.
Principales métodos:
- Difusión de la fase gaseosa para la incorporación de moléculas invitadas.
- Difracción de rayos X en polvo (PXRD) para el análisis estructural.
- Espectroscopia de Resonancia Paramagnética Electrónica (EPR) para el estudio de las especies radicales.
Principales resultados:
- Se observó la inclusión selectiva de BDTA y MBDTA en el marco MIL53 (((Al).
- BDTA mantuvo un motivo de dímeros π*-π* dentro de MIL53(Al)@BDTA.
- MBDTA apareció como un monómero en MIL53(Al)@MBDTA.
- Las moléculas huéspedes se liberaron fácilmente con la adición de diclorometano (CH2Cl2).
Conclusiones:
- MIL53 (((Al) exhibe propiedades selectivas de huésped para los radicales BDTA y MBDTA.
- La disposición estructural de las moléculas huéspedes (dimérico vs. monomérico) depende de su estructura química específica.
- La reversibilidad de la inclusión / liberación de invitados sugiere aplicaciones potenciales en materiales receptivos.
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