A 3D Covalent Organic Framework with Exceptionally High Iodine Capture Capability

作者：Wang, Chang; Wang, Yu; Ge, Rile; Song, Xuedan; Xing, Xueqing; Jiang, Qike; Lu, Hui; Hao, Ce; Guo, Xinwen; Gao, Yanan^*; Jiang, Donglin^*

来源：Chemistry - A European Journal, 2018, 24(3): 585-589.

DOI：10.1002/chem.201705405

• adsorbent
• covalent organic framework
• iodine
• nuclear energy
• porous materials

Using porous materials to cope with environmental issues is promising but remains a challenge especially for removing the radioactive vapor wastes in fission because of harsh adsorption conditions. Here we report a new, stable covalent organic framework (COF) as a porous platform for removing iodine vapor-a major radioactive fission waste. The three-dimensional COF consists of a diamond topology knotted by adamantane units, creates ordered one-dimensional pores and are highly porous. The COF enables the removal of iodine vapor via charge transfer complex formation with the pore walls to achieve exceptional capacity. Moreover, the 3D COF is "soft" to trigger structural fitting to iodine while retaining connectivity and enables cycle use for many times while retaining high uptake capacity. These results set a new benchmark for fission waste removal and suggest the great potential of COFs as a designable porous material for challenging world-threatening pollution issues.

• 出版日期2018-1-12
• 单位精细化工国家重点实验室; 海南大学; 中国科学院; 中国科学院大连化学物理研究所; 大连理工大学