Two metallo-hydrogen-bonded organic frameworks (MHOFs) with different structures and properties were successfully synthesized by self-assembling a phosphate complex and a macrocyclic ligand with three peripheral carboxylic acids. The involvement of phosphate in hydrogen bonding was found to significantly influence the thermal stability, BET surface area, and water vapor uptake capacity of the MHOFs.
Two metallo-hydrogen-bonded organic frameworks (MHOFs) were synthesized by self-assembling a phosphate complex and a macrocyclic ligand with three peripheral carboxylic acids. The two MHOFs have different hydrogen-bond linkages and structures, depending on whether the phosphate participates in the hydrogen bonding. The various hydrogen-bonded networks result in different thermal stabilities, BET surface areas, and water vapor uptake capacities of the MHOFs. MHOF-PO4-2, which has more hydrogen bonds and higher porosity, shows better thermal stability and water vapor adsorption than MHOF-PO4-1. This study demonstrates the possibility of constructing diverse and functional MHOFs based on phosphate complexes. With phosphate participating in H-bond linkage or not, two MHOFs with different structures were synthesized based on a phosphate complex.
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