A new hybrid zinc phosphite with a pillared layered structure: Synthesis and characterization of [C6N2O2H16][Zn(HPO3)]2

•A new inorganic–organic hybrid zinc phosphite was synthesized.•The structure features a pillared-layer framework with dmc topology.•Left- and right-handed helical chains are observed in the 4.82 layer.•Long and flexible aliphatic polyamines act as pillaring ligands.

By using flexible 1,2-bis(2-aminoethoxy)ethane (BAEOE) as a pillaring ligand, a new inorganic–organic hybrid open-framework zinc phosphite, [C6N2O2H16][Zn(HPO3)]2 (1), has been hydrothermally synthesized and structurally characterized by IR, elemental analysis, thermogravimetric analysis, powder and single-crystal X-ray diffractions. The structure of 1 consists of neutral layers of zinc phosphite which are further pillared through linear BAEOE ligands, generating a 3D framework with unusual (3, 4)-connected dmc topology. The participation of left-handed and right-handed helical chains in the construction of puckered sheet structure with 4.82-net is also noteworthy.

Graphical abstractA new inorganic–organic hybrid zinc phosphite, [C6N2O2H16][Zn(HPO3)]2 (1), has been synthesized under hydrothermal conditions. The structure consists of neutral layers of zinc phosphite which are further pillared through linear BAEOE ligands, generating a 3D framework with unusual (3, 4)-connected dmc topology. It is the first 3D inorganic–organic hybrid metal phosphite pillared by flexible aliphatic polyamines.Figure optionsDownload full-size imageDownload as PowerPoint slide