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Los pilares: una clase de huéspedes metálico-orgánicos supramoleculares
Philipp J Altmann1, Alexander Pöthig1
1Catalysis Research Center & Department of Chemistry, Technische Universität München , Ernst-Otto-Fischer-Str. 1, 85747 Garching bei München, Germany.
Journal of the American Chemical Society
|September 30, 2016
Resumen
Los nuevos complejos de oro y plata crean estructuras tubulares que capturan selectivamente moléculas lineales. Estos compuestos estables solubles en agua ofrecen nuevas posibilidades para el reconocimiento molecular y las aplicaciones de detección.
Área de la Ciencia:
- Química supramolecular
- Química de coordinación
- Ciencias de los materiales
Sus antecedentes:
- Las metalocavitandas ofrecen oportunidades únicas de química huésped-huésped.
- El diseño de moléculas de huésped estables y solubles es crucial para las aplicaciones prácticas.
- El reconocimiento molecular selectivo es un desafío clave en química.
Objetivo del estudio:
- Para sintetizar nuevos complejos NHC de oro (I) y plata (I).
- Investigar su capacidad para formar estructuras metallocavitadas con cavidades tubulares.
- Demostrar el hospedaje selectivo de moléculas lineales y explorar sus propiedades en soluciones acuosas.
Principales métodos:
- Síntesis de complejos NHC octanucleares de oro (I) y plata (I).
- Reacciones de intercambio aniónico para ajustar la solubilidad.
- El amortiguamiento de la luminiscencia, la calorimetría de titulación isotérmica, la espectroscopia de RMN y la cristalografía de rayos X para estudios de interacción huésped-invitado.
Principales resultados:
- Formación de estructuras metalocavitadas con cavidades tubulares bien definidas.
- Alojamiento selectivo de moléculas lineales, ejemplificado por el 1,8-diaminooctano.
- Se logra una alta solubilidad en agua y una alta estabilidad a largo plazo de los complejos.
- El complejo de oro exhibe luminiscencia, lo que permite la determinación de la constante de unión.
Conclusiones:
- Los nuevos complejos NHC octanucleares forman efectivamente metallocavitandos para el reconocimiento lineal selectivo de moléculas.
- La solubilidad ajustable y la estabilidad en agua hacen que estos complejos sean prometedores para diversas aplicaciones.
- Las propiedades de luminiscencia del complejo gold (I) proporcionan un método para cuantificar las interacciones huésped-huésped.
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