Three Highly Stable Cobalt MOFs Based on “Y”-Shaped Carboxylic Acid: Synthesis and Absorption of Anionic Dyes

Three
Co­(II) metal–organic frameworks (MOFs) were synthesized
employing a rational design approach. On the basis of the different
structures of three complexes, we tested their absorption properties
toward two anionic dyes. The absorption results indicate that not
only uncoordinated functional groups in the structure play an important
role in adsorbing capacity but also physical forces can affect absorbing
ability. Water stability testing shows that three crystals display
high stability in aqueous solutions with different pH values. To our
delight, the framework integrity of three complexes can be well-retained
even after absorbing dyes.