Humidity-Induced Structural Transformation in Pseudopolymorph Coordination Polymers

Three cadmium coordination polymers, namely, {[CdL(OAc)₂](C₂H₅OH)}_n (1), {[CdL(OAc)₂](CH₃CN)}_n (2), and [CdL(OAc)₂(H₂O)]_n (3), were synthesized by an exoditopic 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene Schiff base ligand (L) and cadmium acetate in the presence of different solvent systems. Single-crystal X-ray diffraction, powder X-ray diffraction, and thermogravimetric analysis showed that 1D ladder pseudopolymorphic compounds (1 and 2) transformed to the solvent-free 1D linear compound 3 through a rare case of water absorption from air at room temperature. Interestingly, compound 3 was transformed to compound 1 through a dissolution-recrystallization structural transformation process. The results illustrated that solvents and humidity have an important role in the formation of pseudopolymorphs with the same or different structural motifs.

Solvent-controlled structural diversity observed in three Cu(ii) MOFs with a 2,2′-dinitro-biphenyl-4,4′-dicarboxylate ligand: synthesis, structures and magnetism

Three solvent-dependent 3D Cu^II-based MOFs with diverse topology net have been successfully separated under controllable solvothermal conditions and magnetic studies suggest homo-spin topological ferrimagnetic and antiferromagnetic interactions.

A series of coordination polymers based on varied polycarboxylates and different imidazole-containing ligands: syntheses, crystal structures and physical properties

To investigate the effect of organic ligands on the coordination frameworks, seven nickel(ii) coordination polymers, based on varied polycarboxylates and different imidazole-containing ligands, are synthesized under hydrothermal method.

Porous organic polymers derived from tetrahedral silicon-centered monomers and a stereocontorted spirobifluorene-based precursor: synthesis, porosity and carbon dioxide sorption

Porous organic polymers show high and tunable porosity, and moderate CO₂ uptake and CO₂ selectivity over other gases simultaneously using tetrahedral silicon-centered monomers and a stereocontorted spirobifluorene-based precursor as building units.

Solvothermal synthesis, structure, and fluorescence properties of three d10 polymers assembled from semi-rigid V-shaped aza-bridged multicarboxylate

Hydrothermal reactions of azanediyldibenzoic acid and M(OH)₂ with different ancillary ligands afford three polymers. These polymers show great different structures and properties originated from the variation of second ligands and coordination modes.