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Herein, we introduce a new square lattice topology coordination network, sql-(1,3-bib)(ndc)-Ni, with three types of connection and detail its gas and vapour induced phase transformations. Exposure to humidity resulted in an S-shaped isotherm profile, suggesting potential utility of such materials as desiccants.

Two zirconium-organic frameworks were synthesized by exchanging the acetate ligands in [Zr 12 O 8 (OH) 8 (CH 3 COO) 24 ] with polydentate linkers. Partial substitution of acetate groups by a phosphine based linker yielded a new porous framework with this unique dimeric Zr 12 cluster unit as molecular building block. More exhaustive substitution of acetate resulted in cleavage of the Zr 12 unit and formation of UiO-67.