Flexible three-dimensional diacetylene functionalized covalent organic frameworks for efficient iodine capture. Issue 3 (23rd December 2022)

• Record Type: Journal Article
• Authors: Zou, Junyan; Wen, Dan; Zhao, Yu
• Is Part Of: Dalton transactions. Volume 52:Issue 3(2023)
• Page Start: 731
• Page End: 736
• Publication Date: 2022-12-23
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt03362c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Diamondyne-like covalent organic frameworks containing abundant electron-rich acetylene groups (–CC–) for efficient iodine capture. 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.