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Updated: Jan 8, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Polímeros orgánicos covalentes de base Schiff macrocíclica con sitios múltiples sinérgicos para la captura de

Liang Liu¹, Zhonglin Ma², Jiaqing Huang¹

¹College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China.

Journal of hazardous materials

|December 20, 2025

Abstract:

Radioactive iodine species (iodine and methyl iodide) released from nuclear fuel reprocessing pose a persistent threat to environmental integrity and human health. Conventional adsorbents suffer from loss of dynamic adsorption performance for iodine (I₂) and methyl iodide (CH₃I) under high-temperature conditions, rendering them ineffective in practical reprocessing scenarios. In this study, covalent organic polymers (COPs) with affinity for both iodine and methyl iodide were rationally designed, and their adsorption properties were modulated by adjusting the nucleophilic N-sites and π-electron density around functionalized monomers. Through Schiff-base reaction, three COPs，TCFD-TAPT，TCFD-TAPB and TCFD-ETTA were obtained for I elemental adsorption. Except for the outstanding static uptake, the dynamic capacities of CH₃I and I₂ were also determined. The results showed that TCFD-TAPT exhibited specific adsorption of CH₃I at 150 °C with a dynamic capacity of 0.069 g/g (0.35 mg/min), whereas TCFD-TAPB dynamically captured I₂ with an uptake of 0.41 g/g (3.91 mg/h) at the same temperature, surpassing most of reported COPs. This work illustrates cooperative site recognition for efficient iodine species capture and offers new insights into the design of advanced polymeric adsorbents. The developed COPs show great potential for practical applications in nuclear off-gas treatment and radioactive iodine management.

Palabras clave:

Captura eficiente de yodo/yodometano Alta temperatura Polímeros orgánicos covalentes macrocíclicos Sitios multiesctructurales sinérgicos

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