A new heptanuclear complex based on hexacyanoferrate with cobalt(II) cations of tridentate ligands

Architectural Isomerism in the Three-Dimensional Prussian Blue Analogue {[CoII(TPA)]3[FeIII(CN)6][CoIII(CN)6]}: Synthesis, Crystal Structures, and Magnetic Properties

“…However, it should be noticed that a heptanuclear {Co II (TPA)] 6 [Fe II (CN) 6 ]} 8+ complex was reported in 2014, which exhibits very weak antiferromagnetic interactions. 13 Here, we report two PBAs by using [M(CN) 6 ] 3− (M = Fe III and Co III ) as building units and tris(2-pyridylmethyl)amine (TPA) as the capping ligand, i.e., {[Co II (TPA)] 3 [Fe III ■ RESULTS AND DISCUSSION Synthesis. Architectural isomers 1 and 2 were prepared under solvothermal conditions (Scheme 1), in which the precursor [(NC) 5 Fe(pz)Fe(CN) 5 ] 4− was obtained by a modified literature method (Supporting Information).…”

“…To date, bidentate and tridentate aromatic amines and tetradentate aliphatic amines are often selected as the capping ligands, but to our knowledge, the synthesis of 3D PBAs by [M­(CN) 6 ] 3–/4– building units and aromatic tetradentate amine ligands has not been explored so far. However, it should be noticed that a heptanuclear {Co II (TPA)] 6 [Fe II (CN) 6 ]} 8+ complex was reported in 2014, which exhibits very weak antiferromagnetic interactions …”