Flexible three-dimensional diacetylene functionalized covalent organic frameworks for efficient iodine capture

Junyan Zou; Dan Wen; Yu Zhao

doi:10.1039/d2dt03362c

Flexible three-dimensional diacetylene functionalized covalent organic frameworks for efficient iodine capture

Dalton Trans. 2023 Jan 17;52(3):731-736. doi: 10.1039/d2dt03362c.

Authors

Junyan Zou¹, Dan Wen^{2

3}, Yu Zhao^{2

3}

Affiliations

¹ Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou 510632, Guangdong, China.
² Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty Chemicals, Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, Jinhua 321004, Zhejiang, China. zhaoyu@zjnu.edu.cn.
³ Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.

PMID: 36562413
DOI: 10.1039/d2dt03362c

Abstract

The construction of functionalized covalent organic frameworks (COFs) is of great significance for broadening their potential applications, but is yet challenging to achieve, especially for three-dimensional (3D) COFs, because the connection of the building organic skeleton must strictly follow the pre-designed topology. Here we present the synthesis of two diamondyne-like 3D COFs (CPOF-2 and CPOF-3) functionalized with acetylene (-CC-) and diacetylene (-CC-CC-), respectively. The obtained COFs show a high crystallinity, permanent porosity, and chemical stability. Furthermore, CPOF-3 exhibited an extremely high volatile iodine uptake (as high as 5.87 g g^-1), much higher than that of most reported COF-based adsorbents for iodine capture. Therefore, this study provides a new design principle to obtain high-performance iodine loading porous materials to solve the environmental pollution problem caused by radioactive iodine in the waste of the nuclear industry.