A new 1-D chain-like organic–inorganic hybrid phosphotungstate constructed by sandwich-type clusters and [Ni(en)₂]²⁺ linkers

Abstract

A new 1-D chain-like organic–inorganic hybrid phosphotungstate based on tetra-Ni-sandwiched polyoxoanion, [Ni(en)₂]₂[{Ni₃(en)₆(H₂O)₂Ni₄(H₂O)₂(α-PW₉O₃₄)₂}] · 7H₂O (en = ethylenediamine) (1), has been synthesized under hydrothermal conditions and characterized by IR spectrum, UV spectrum, elemental analysis, thermogravimetric analysis, and single-crystal X-ray diffraction. 1 crystallizes in the triclinic P 1 space group with cell parameters a = 13.232(4) Å, b = 15.591(5) Å, c = 15.701(5) Å, α = 112.804(5)°, β = 92.159(5)°, γ = 109.012(5)°, Z = 1, R ₁ = 0.0588, wR ₂ = 0.1387. Compound 1 displays a 1-D chain-like architecture constructed by sandwich-type polyoxoanions and [Ni(en)₂]²⁺ linkers. Magnetic measurement reveals that intramolecular ferromagnetic interactions exist in the tetranuclear {Ni₄O₁₆} cluster.

Keywords:

• Phosphotungstate
• Hydrothermal
• Crystal structure
• Magnetic

Acknowledgments

This work was financially supported by the Natural Science Foundation of China, Special Research Fund for the Doctoral Program of Higher Education, Innovation Scientists and Technicians Troop Construction Projects of Henan Province, Natural Science Foundation of Henan Province.