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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
Un nuevo motivo de unión de tiolatos estéricamente exigentes en un racimo de oro
Jun-ichi Nishigaki1, Risako Tsunoyama, Hironori Tsunoyama
1Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|August 21, 2012
Resumen
Los investigadores sintetizaron un nuevo cúmulo de oro, Au41) S-Eind) 12), utilizando un ligando arenetiol voluminoso. Este método suprimió la formación de oligómeros de tiolato de oro, a diferencia de las estrategias tradicionales de protección de racimos de oro.
Área de la Ciencia:
- * Ciencia de los nanomateriales Ciencia de los nanomateriales
- * Química Inorgánica y Química Inorgánica.
- * Química de las superficies
Sus antecedentes:
- * Los clústeres de oro son nanomateriales prometedores con propiedades ópticas y electrónicas únicas.
- * La síntesis convencional a menudo involucra ligandos de tiolato, lo que puede conducir a una oligomerización no deseada en la interfaz oro-tiolato.
- * El control de la estructura de la interfaz es crucial para adaptar las propiedades de los grupos de oro.
Objetivo del estudio:
- * Para sintetizar y caracterizar un nuevo racimo de oro protegido por un ligando arenetiol voluminoso.
- * Para investigar el efecto del ligando voluminoso en la formación de oligómeros de oro-tiolato.
- * Para comparar la estructura interfacial con los grupos de oro protegidos por tiolato sintetizados convencionalmente.
Principales métodos:
- * Síntesis del clúster de oro Au(41)(S-Eind)(12) mediante la ligadura de 1,1,3,3,5,5,7,7-octaetil-s-hidrindaceno-4-tiol (Eind-SH) a los clústers de oro preformados.
- * Caracterización mediante la estructura fina de absorción de rayos X extendida (EXAFS).
- * Análisis de la superficie mediante espectroscopia de fotoelectrones de rayos X (XPS).
- * Investigación estructural a través de patrones de fragmentación de la espectrometría de masas (MS).
Principales resultados:
- * Síntesis exitosa del grupo de oro Au{4}{S}{Eind}{12}.
- * Los análisis de EXAFS, XPS y MS confirmaron la supresión de la formación de oligómeros de oro-tiolato en la interfaz.
- * La naturaleza voluminosa del ligando Eind-SH impidió efectivamente la oligomerización interfacial.
Conclusiones:
- * El uso de ligandos de arenetiol voluminosos ofrece una nueva estrategia para sintetizar grupos de oro bien definidos.
- * La supresión de la oligomerización interfacial conduce a distintas propiedades estructurales y potencialmente electrónicas en comparación con los clústeres convencionales.
- * Este enfoque proporciona un mejor control sobre la estructura y la estabilidad del clúster de oro.
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