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Diseño del complejo de paladio soportado por goma de guar modificada con base de Schiff con múltiples sitios

Yahao Dong¹, Jie Yang¹, Yihan Liu¹

¹Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, PR China.

International journal of biological macromolecules

|February 12, 2026

Resumen

Este estudio introduce un nuevo catalizador basado en goma de guar (GG) para una síntesis de nitrilo de arilo más ecológica. El GG modificado inmoviliza eficientemente el paladio, mejorando la catálisis y evitando la lixiviación de metales para transformaciones orgánicas sostenibles.

Área de la Ciencia:

Química verde es la química verde.
Ciencia de los materiales Ciencia de los materiales.
La catálisis de la catálisis.

Sus antecedentes:

La goma de guar (GG), un polisacárido natural, ofrece biocompatibilidad y disponibilidad, pero su potencial catalítico sigue siendo poco explorado.
La síntesis convencional de nitrilo de arilo utiliza fuentes tóxicas de cianuro, lo que hace necesarias alternativas ecológicas.
La modificación química del GG puede establecerlo como un bioproveedor para la catálisis heterogénea.

Objetivo del estudio:

Diseñar y sintetizar un nuevo catalizador de 5-hidroximetilfurfural (HMF) modificado con GG apoyado en paladio (Pd) (GG-SB-Pd).
Evaluar la eficiencia del catalizador en las reacciones de cianuración utilizando fuentes de cianuro no tóxicas.
Explorar el potencial de los polisacáridos modificados en las transformaciones orgánicas.

Principales métodos:

Sintetizó un catalizador Pd soportado por GG utilizando GG modificado por HMF como estabilizador para la inmovilización de Pd.
Empleado multi-dentado funcionalizado GG para crear sitios de coordinación para el paladio.
Se utilizaron fuentes de cianuro no tóxicas para las reacciones de cianuración.
Investigó la reciclabilidad del catalizador a través de la centrifugación.

Principales resultados:

El catalizador sintetizado GG-SB-Pd facilitó eficientemente la síntesis de nitrilo de arilo.
El catalizador demostró un rendimiento catalítico mejorado debido a múltiples sitios de coordinación (hidroxilo, furilo, imina).
Se observó una lixiviación mínima de paladio (<1%) y el catalizador fue reciclable durante al menos 5 ciclos.
Se propuso una estructura multifuncional cooperativa para explicar la actividad catalítica.

Conclusiones:

Este estudio desarrolló con éxito un nuevo catalizador basado en polisacáridos para una síntesis orgánica más ecológica.
La goma de guar modificada sirve como un bio-soporte eficaz para el paladio, permitiendo reacciones de cianificación eficientes y sostenibles.
Los hallazgos proporcionan información valiosa sobre el diseño de materiales basados en polisacáridos para catálisis heterogénea y transformaciones orgánicas.

Palabras clave:

Reacción de cianado.El guar guar es una goma de mascar.La modificación de la modificación de la modificación.Múltiples sitios coordinados.El paladio es de paladio.

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