ABSTRACT
A majority of both microporous and mesoporous metal-organic frameworks (MOFs) are not stable in water due to the hydrolysis of their coordination 'node', which contains the complex of the metal ion and organic linker. However, several well-studied mesoporous MOFs, particularly those from the MIL-100 and MIL-101 families, show rather high stability to water, in either the liquid or the vapor phase. This stability has offered opportunities for quite many applications of water-stable mesoporous MOFs, in particular in environmental and biomedical fields. The difference in the adsorption isotherms at small water loadings was found to be due to the different partial charge on Cr (III). The fluorine-free colloids of nanocrystalline MIL-100(Fe), termed nanocrystalline MOFs or NMOFs, namely, NMOF MIL-100(Fe), have been found to be stable in liquid water at 37ºC for 3 days. The stability of MOFs was retained after as many as 40 temperature cycles with water adsorption and desorption.
