Assembly of two novel inorganic–organic hybrid solids based on 3-(aminomethyl)pyridine ligand

• Two hybrid materials have been solvothermally synthesized.
• Distinct coordination modes of the same ligand were realized.
• New 2D zinc phosphate-phosphite layer was observed in 1.
• 3D pillar-layered structure was observed in 2.
• Left- and right-handed helical zinc-amine chains were observed in 2.

Two new inorganic–organic hybrids, (Hampy)Zn2(PO4) (HPO3) (1) and (ampy)Zn2(HPO3)2 (2), where ampy = 3-(aminomethyl)pyridine, have been solvothermally prepared and structurally characterized. Compound 1 exhibits an unusual two-dimensional layer structure, which possesses a central 4.82 zincophosphate sheet wrapped by infinite zincophosphite chains. Left- and right-handed helical chains participate in the formation of the zincophosphate layer. Compound 2 features a three-dimensional pillared-layer structure, in which two-dimensional ZnII(HPO3) inorganic sheets were cross-linked by ampy ligands. The simultaneous occurrence of zinc-amine helical chains in 2 is unique and, to the best of our knowledge, firstly encountered in phosphite/phosphate hybrid materials. Different coordination modes and roles of the same ampy ligand were observed in the formation of the hybrid structures.

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