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Modulación de la estructura electrónica en marcos orgánicos covalentes a través del posicionamiento de etinyl para

Lingli Zhang¹, Li Wang¹, Feng Luo¹

¹National Key Laboratory of Uranium Resources Exploration-Mining and Nuclear Remote Sensing, East China University of Technology, Nanchang 330013, China.

|February 10, 2026

Resumen

Los grupos etinyl incrustados en el marco en marcos orgánicos covalentes (COF) aumentan significativamente la capacidad de captura de yodo. Este principio de diseño ofrece un rendimiento superior para la eliminación de yodo radiactivo en condiciones industriales.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Ciencia de la adsorción Ciencia de la adsorción.
Química del medio ambiente Química del medio ambiente

Sus antecedentes:

La captura de yodo de las emisiones industriales es un desafío.
Las estructuras orgánicas covalentes (COF) con grupos etinilo son prometedoras para la adsorción de yodo.
El posicionamiento de los grupos etinyl (incorporados vs. colgantes) en los COF tiene un impacto en el rendimiento.

Objetivo del estudio:

Investigar el efecto del posicionamiento del grupo etinyl en los COF sobre la adsorción de yodo.
Para sintetizar y caracterizar el etinyl-COF incrustado en el marco (TPEB-TAPB-COF), el etinyl-COF dependiente de los poros (BPO-TAPB-COF) y un COF no etinilo (TFPB-TAPB-COF).
Para evaluar el rendimiento de captura de yodo bajo vapor saturado y condiciones industriales simuladas.

Principales métodos:

Síntesis de tres COFs distintos con diferentes configuraciones de grupos etinyl.
Medición de la capacidad de adsorción de yodo bajo vapor de yodo saturado.
Prueba de adsorción de yodo en condiciones industriales simuladas (150 °C, 150 ppmv I2).

Principales resultados:

TPEB-TAPB-COF (incorporado en el marco) logró una alta capacidad de captura de yodo de 8,65 g/g en condiciones saturadas.
Los grupos etinyl dependientes de poros en BPO-TAPB-COF mostraron una capacidad reducida debido a la limitada deslocalización de electrones.
TPEB-TAPB-COF exhibió un excelente rendimiento (0,493 g / g) en condiciones industriales simuladas, superando el rendimiento de la mayoría de los materiales porosos.

Conclusiones:

Los grupos etinyl incrustados en el marco mejoran la deslocalización de electrones, lo que lleva a una adsorción superior de yodo en los COF.
El posicionamiento de los grupos etinyl es crítico para optimizar el rendimiento de COF en la captura de yodo.
Este estudio presenta una nueva estrategia de diseño para el desarrollo de materiales avanzados de captura de yodo radiactivo.

Palabras clave:

La adsorción es la adsorción.El marco de trabajo orgánico covalente.Captura de yodo radiactivo.

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