Hydrothermal synthesis and characterization of a new inorganic–organic hybrid layered zinc phosphate–phosphite (C6H15N2)2Zn4(PO4)2(HPO3)2

Abstract

Using H₃PO₃ or H₃PO₂ as a phosphorus source, the first inorganic–organic hybrid layered zinc phosphate–phosphite (C₆H₁₅N₂)₂Zn₄(PO₄)₂(HPO₃)₂ (denoted ZnPO-CJ12) has been hydrothermally synthesized in the presence of 1,2-diaminocyclohexane (DACH) as a structure-directing agent. Single-crystal X-ray diffraction analysis shows that its structure is made up of inorganic–organic hybrid sheets containing both PO₄³⁻ and HPO₃²⁻ anions. Only the trans-isomers are involved in the structure even though a mix of trans- and cis-isomers of DACH molecules are added in the reaction mixture. The hydrophobic ends of the DACH molecules exclusively protrude into the interlayer region.