One-pot synthesis of Mn-containing 2D framework based on 5-nitro-1,2,3-benzenetricarboxylic and 2-hydroxy-5-nitroisophthalic ligands: Synthesis, structure and magnetic properties

An unprecedented Mn-containing polymer, namely, [Mn2IIMn2III(O2N-bta)(O2N-ipa)2(im)(OH)(H2O)2] (1) (O2N-H3bta = 5-nitro-1,2,3-benzenetricarboxylic acid, O2N-H3ipa = 2-hydroxy-5-nitroisophthalic acid, im = imidazole), has been hydrothermally synthesized by one-pot method with O2N-bta and in situ generated O2N-ipa and im ligands. Single crystal X-ray diffraction study reveals that compound 1 is constructed by tetranuclear mixed-valent MnII/MnIII clusters and exhibits a novel 2D framework. In addition, the magnetic properties and thermal stability of 1 were also discussed.