Hydrothermal synthesis, structure and variable temperature magnetic performance of polyferric sulfate with µ₃-O^2- and µ₃-OH^--centered Trinuclear Ferric(III)

Abstract

A novel inorganic coordination polymers crystal is grown from ferric sulfate solution under hydrothermal condition in the presence of adipic acid. The single crystal structure analysis shows that 0.5[Fe₆(μ₃-O^2-)₂(μ₃-OH^-)₂(SO₄)₆]^.2H₂O 1 is composed of µ₃-O^2- and µ₃-OH^--centered Trinuclear Ferric(III) secondary building units (SUBs) to form two dimensional network, and the lattice parameters are a = 18.223(13) Å, b = 7.670(5) Å, 9.932(7) Å, α = β= γ = 90°, orthorhombic crystal system, Cmc2₁ space group, V = 1388.3(17) ų. Squid-VSM magnetic measurement system is used for characterizing the variable temperature magnetic properties measurement of reaction products, and the result indicates that the magnetic susceptibility is obvious reduced with the increasing of test temperature. Noticeably, the higher magnetic susceptibility is acquired at about 0 K. Consequently, the products can be used as a good candidate for magnetic memory materials.

KEYWORDS:

• Polyferric sulfate
• hydrothermal synthesis
• crystal structure
• magnetic properties

Additional information

Funding

Financial support from the Opening Project of PCOSS, Xiamen University (No. 201921), Excellent Talent Foundation of Education Department of Anhui Province (No. gxyq2018055), the Natural Science Foundation of the Education Department of Anhui Province (No. KJ2019A0731, KJ2020A0096), the fifth batch of “special branch plan” projects in Anhui Province were appreciated.