Cationic Nonporous Macrocyclic Organic Compounds for Multimedia Iodine Capture

• Published in: Chemistry, an Asian journal Vol. 16; no. 2; pp. 142 - 146
• Main Authors: Xu, Xiao‐Qian, Cao, Li‐Hui, Yang, Yan, Bai, Xiang‐Tian, Zhao, Fang, He, Zhen‐Hong, Yin, Zheng, Ma, Yang‐Min
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 18.01.2021
• Subjects: Anions; cationic structure; Cations; Chemistry; Iodine; iodine capture; macrocyclic organic compounds; Multimedia; nonporosity; Nuclear electric power generation; Nuclear engineering; Nuclear reactors; Organic compounds; Porous materials; Radioactive wastes; cationic structure; nonporosity; iodine capture; macrocyclic organic compounds
• ISSN: 1861-4728; 1861-471X; 1861-471X
• DOI: 10.1002/asia.202001298

Over the past two decades, progress in chemistry has generated various types of porous materials for removing iodine (129I or 131I) that can be formed during nuclear energy generation or nuclear waste storage. However, most studies for iodine capture are based on the weak host‐guest interactions of the porous materials. Here, we present two cationic nonporous macrocyclic organic compounds, namely, MOC‐1 and MOC‐2, in which 6I‐ and 8I− were as counter anions, for highly efficient iodine capture. MOC‐1 and MOC‐2 were formed by reacting 1,1′‐diamino‐4,4′‐bipyridylium di‐iodide with 1,2‐diformylbenzene or 1,3‐diformylbenzene, respectively. The presence of a large number of I− anions results in high I2 affinity with uptake capacities up to 2.15 g ⋅ g−1 for MOC‐1 and 2.25 g ⋅ g−1 for MOC‐2. Two cationic nonporous macrocyclic organic compounds with I− as counter anions were synthesized and applied for highly efficient iodine capture. The I− ions in the structure effectively improve iodine adsorption capacity and adsorption rate of the nonporous materials.