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Facile Purification of Porous Metal Terephthalates with Ultrasonic Treatment in the Presence of Amides
Author(s) -
Haque Enamul,
Khan Nazmul Abedin,
Lee Ji Eun,
Jhung Sung Hwa
Publication year - 2009
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200902036
Subject(s) - terephthalic acid , microporous material , adsorption , porosity , dimethylformamide , metal organic framework , materials science , volume (thermodynamics) , metal , ultrasonic sensor , fourier transform infrared spectroscopy , chemical engineering , specific surface area , chromatography , chemistry , organic chemistry , catalysis , physics , quantum mechanics , solvent , acoustics , polyester , engineering
A facile purification method for metal–organic frameworks (MOFs), especially the ones containing insoluble 1,4‐benzenedicarboxylic acid (terephthalic acid) in the pore, has been suggested. The purification method consists of the treatment of the MOF with amides such as N , N ‐dimethylformamide, especially under ultrasound treatment. The purification is completed within 1 h at 70 °C as has been confirmed by XRD, nitrogen adsorption, FTIR and TGA measurements. The purification method proved to be simple, one‐step, fast and energy‐efficient. The MOFs purified by the proposed method show high surface area and micropore volume, confirming the efficiency of the method. The proposed method will lead to a new access to activate (for example, to remove carboxylic acids) MOFs that are unstable above around 100 °C. Additionally, the method may be used to transform a non‐porous MOF‐type material into a porous MOF structure. However, adequate solvents will be necessary for the facile purification of MOFs.