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Cooperative Capture of Uranyl Ions by a Carbonyl‐Bearing Hierarchical‐Porous Cu–Organic Framework
Author(s) -
Wang XiaoFeng,
Chen Yangyang,
Song LiPing,
Fang Zhen,
Zhang Jian,
Shi Fanian,
Lin YingWu,
Sun Yunkai,
Zhang YueBiao,
Rocha João
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201909045
Subject(s) - nanocages , uranyl , sorption , metal organic framework , ligand (biochemistry) , chemistry , porosity , ion , mesoporous material , uranium , crystallography , materials science , chemical engineering , adsorption , organic chemistry , metallurgy , biochemistry , receptor , engineering , catalysis
To efficiently capture the toxic uranyl ions (UO 2 2+ ), a new hierarchical micro‐macroporous metal–organic framework was prepared under template‐free conditions, featuring interconnected multi‐nanocages bearing carbonyl groups derived from a semi‐rigid ligand. The material exhibits an unusually high UO 2 2+ sorption capacity of 562 mg g −1 , which occurs in an intriguing two‐steps process, on the macropore‐based crystal surface and in the inner nanocages. Notably, the latter is attributed to the cooperative interplay of the shrinkage of the host porous framework induced by uranyl accommodation and the free carbonyl coordination sites, as shown by both single‐crystal X‐ray diffraction and a red‐shift of the infrared [O=U VI =O] 2+ antisymmetric vibration band.