Ionothermal synthesis of a new three-dimensional manganese(ii) phosphate with DFT-zeotype structure

Abstract

A new manganese phosphate |H₃N(CH₂)₂NH₃|[Mn₂P₂O₈] (denoted as JIS-14), has been ionothermally synthesized by using eutectic mixtures as the solvent and template-delivery agent, which in situ yields ethylene diammonium cations (en²⁺) acting as the template. JIS-14 is the first example of manganese phosphate with 4-connected zeolite topology and exhibits a DFT-zeotype framework built up from the strict alternation of MnO₄ and PO₄ tetrahedra forming 3D 8-ring channels. Protonated en²⁺ cations locate in the channels compensate the negative charges of the inorganic framework. Magnetic measurements reveal that weak antiferromagnetic interaction exists in JIS-14.