A Cucurbit[8]uril‐Based Supramolecular Framework Material for Reversible Iodine Capture in the Vapor Phase and Solution

Author:

Lu Yun1,Yu Zhichao1,Zhang Tingting1,Pan Dingwu1,Dai Jingjing1,Li Qing1,Tao Zhu1,Xiao Xin1ORCID

Affiliation:

1. National Key Laboratory of Green Pesticide State Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province Guizhou University Guiyang 550025 China

Abstract

AbstractThe safe and efficient management of hazardous radioactive iodine is significant for nuclear waste reprocessing and environmental industries. A novel supramolecular framework compound based on cucurbit[8]uril (Q[8]) and 4‐aminopyridine (4‐AP) is reported in this paper. In the single crystal structure of Q[8]‐(4‐AP), two 4‐AP molecules interact with the outer surface of Q[8] and the two other 4‐AP molecules are encapsulated into the Q[8] cavity to form the self‐assembly Q[8]‐(4‐AP). Iodine adsorption experiments show that the as‐prepared Q[8]‐(4‐AP) not only has a high adsorption capacity (1.74 g· g−1) for iodine vapor but also can remove the iodine in the organic solvent and the aqueous solution with the removal efficiencies of 95% and 91%, respectively. The presence of a large number of hydrogen bonds between the iodine molecule and the absorbent, as seen in the single crystal structure of iodine‐loaded Q[8]‐(4‐AP) (I2@Q[8]‐(4‐AP)), is thought to be responsible for the exceptional iodine adsorption capacity of the material. In addition, the adsorption‐desorption tests reveal that the self‐assembly material has no significant loss of iodine capture capacity after five cycles, indicating that it has sufficient reusability.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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