Abstract

A new two-dimensional zinc phosphate [Zn₂(HPO₄)₃]²⁻[(C₆N₄H₂₂)_0.5]²⁺ has been prepared hydrothermally by using triethylenetetramine (tetam) as the structure-directing agent. The structure of the compound was solved by single-crystal X-ray diffraction analysis. [Zn₂(HPO₄)₃]²⁻[(C₆N₄H₂₂)_0.5]²⁺ crystallizes in the triclinic space group P1 (no. 2) with a = 7.4876(8) Å, b = 8.2336(8) Å, c = 12.8592(13) Å, α = 98.723(2)°, β = 101.258(2)°, γ = 115.785(2)°, Z = 2, and V = 674.51(12) Å³. The structure consists of macroanionic sheets stacked in an AAAA sequence. As primary building units in the individual sheet, alternating PO₄ tetrahedra with terminal –OH groups and "unsaturated" O atoms and ZnO₄ tetrahedra are linked together to form elliptical twelve-membered rings as well as four-membered rings. These macroanionic sheets are held together by strong hydrogen bonding.