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Unidades de Construcción de Polioxovanadato en Redes Metal-Orgánicas: Conectividad de Coordinación y Oxidación

Shuang Yu¹, Hui-Li Guo¹, Bo-Jun Yang¹

¹Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, State Key Laboratory of Green Chemical Synthesis and Conversion, Henan University, Kaifeng 475004, PR China.

Inorganic chemistry

|February 28, 2026

Resumen

Nuevas redes metal-orgánicas (MOFs) que utilizan clústeres de polioxovanadato (POV) catalizan eficientemente la oxidación de tioéter. El compuesto 4, que presenta cadenas V-Zn, muestra una actividad y reciclabilidad superiores debido a su estructura estable.

Área de la Ciencia:

Química Inorgánica
Ciencia de Materiales
Catálisis

Sus antecedentes:

Los clústeres de polioxovanadato (POV) ofrecen modos de coordinación diversos para el diseño de redes metal-orgánicas (MOFs).
Las MOFs funcionales son cruciales para el desarrollo de sistemas catalíticos eficientes.

Objetivo del estudio:

Sintetizar y caracterizar nuevas redes metal-orgánicas (MOFs) basadas en polioxovanadato.
Evaluar la actividad catalítica de estas MOFs en la oxidación de tioéteres aromáticos.
Comprender la relación estructura-actividad en las MOFs basadas en POV para la oxidación selectiva.

Principales métodos:

Difracción de rayos X de cristal único para la caracterización estructural.
Reacciones de oxidación catalítica utilizando peróxido de hidrógeno (H2O2).
Análisis comparativo del rendimiento catalítico y la estabilidad estructural.

Principales resultados:

Se sintetizaron y elucidaron estructuralmente cuatro nuevas MOFs basadas en POV: [Co2(DPP)4(V4O12)]·0.25H2O (1), [M3(DPP)4(H2O)4(V6O18)]·2H2O (M = Co (2), Ni (3)), y [Zn3(DPP)3(V6O18)] (4).
Todas las MOFs sintetizadas demostraron una catálisis eficiente para la oxidación de tioéteres aromáticos a sulfóxidos utilizando H2O2.
El compuesto 4 exhibió la mayor actividad catalítica y una excelente reciclabilidad durante cinco ciclos, atribuida a sus robustas cadenas en zigzag V-Zn.

Conclusiones:

La modulación de las unidades de construcción de POV y la conectividad de coordinación es una estrategia eficaz para controlar la actividad y selectividad catalítica de las MOFs.
La acción paralela de los centros V y Zn insaturados en las cadenas V-Zn del compuesto 4 mejora su rendimiento catalítico.
Las MOFs basadas en POV representan materiales prometedores para reacciones de oxidación selectiva.

Palabras clave:

redes metal-orgánicas polioxovanadato oxidación de tioéter catálisis química inorgánica ciencia de materiales

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