Premium
Enhanced Separation of Potassium Ions by Spontaneous K + ‐Induced Self‐Assembly of a Novel Metal–Organic Framework and Excess Specific Cation–π Interactions
Author(s) -
Wu Wenyu,
Kirillov Alexander M.,
Yan Xuhuan,
Zhou Panpan,
Liu Weisheng,
Tang Yu
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201404470
Subject(s) - supramolecular chemistry , crystallization , ligand (biochemistry) , ion , potassium , chemistry , nanoparticle , metal organic framework , metal ions in aqueous solution , metal , self assembly , inorganic chemistry , crystallography , chemical engineering , materials science , nanotechnology , crystal structure , organic chemistry , adsorption , biochemistry , receptor , engineering
A novel metal–organic framework (MOF) was fabricated by spontaneous K + ‐induced supramolecular self‐assembly with the embedded tripodal ligand units. When the 3D ligand was loaded onto Fe 3 O 4 @mSiO 2 core‐shell nanoparticles, it could effectively separate K + ions from a mixture of Na + , K + , Mg 2+ , and Ca 2+ ions through nanoparticle‐assisted MOF crystallization into a Fe 3 O 4 @mSiO 2 @MOF hybrid material. Excess potassium ions could be extracted because of the specific cation–π interaction between K + and the aromatic cavity of the MOF, leading to enhanced separation efficiency and suggesting a new application for MOFs.