Synthesis of the polyethylene polyamine-based flexible covalent organic frameworks and their application for capturing and fluorescence sensing iodine

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2024-07-06 DOI:10.1016/j.reactfunctpolym.2024.106003

Feng Zhu, Ya-Chen Wang, Tong-Mou Geng, Heng Xu

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引用次数: 0

Abstract

Effective uptake of radioactive steam waste in the fission process is of great vital for the safe use of nuclear energy. Nitrogen-rich polyethylenepolyamine provides effective adsorption sites for the capture of iodine, but triethylenediamine (TEDA)-impregnated activated carbon has the disadvantages of easy sublimation, poor safety, and poor regeneration capacity. Herein, we report five polyethylene polyamine-based (PEPA-based) flexible COFs for the first time which were synthesized by Schiff base polymerization reactions with the flexible knot [2,4,6-tris(4-formylphenoxy)-1,3,5-triazine (TPT–3–CHO)] and flexible linkers (PEPA). The PEPA-based flexible COFs possess large surface areas and strong iodine adsorption capacity, which can be reused. With the increase of the linker lengths, their BET-surface areas decreases, but their adsorption of iodine increase. When dispersed in polar organic solvents, the PEPA-based flexible COFs can fluorescently sense iodine through the electron transfer mechanism and the energy transfer mechanism.

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基于聚乙烯多胺的柔性共价有机框架的合成及其在碘捕获和荧光感应中的应用

有效吸收裂变过程中的放射性蒸汽废料对核能的安全利用至关重要。富氮的聚乙烯多胺为碘的捕获提供了有效的吸附位点，但三乙二胺（TEDA）浸渍活性炭具有易升华、安全性差、再生能力差等缺点。在此，我们首次报道了五种基于聚乙烯多胺（PEPA）的柔性 COF，它们是由柔性结[2,4,6-三（4-甲酰基苯氧基）-1,3,5-三嗪（TPT-3-CHO）]和柔性连接体（珠光粉）通过席夫碱聚合反应合成的。珠光粉基柔性 COF 具有较大的表面积和较强的碘吸附能力，可重复使用。随着连接体长度的增加，其 BET 表面积减小，但碘吸附量增加。当分散在极性有机溶剂中时，珠光粉基柔性 COFs 可通过电子转移机制和能量转移机制对碘进行荧光感应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.