Stable metal-organic frameworks with low water affinity built from methyl-siloxane linkers

A tetracarboxylic acid with a methyl-substituted siloxane core (L-H-4) has been prepared and applied in the construction of water stable MOFs with low water affinity.L-H(4)itself crystallizes as an interpenetrated 3D hydrogen-bonded network. Reaction ofL-H(4)with Zr-IV/Hf(IV)gave IMP-32-Zr/Hf - both 3D MOFs ofscutopology.