Synthesis, crystal structures and magnetic and electrochemiluminescence properties of three manganese(II) complexes

Three novel complexes, namely, penta- μ -acetato-bis( μ 2-2-{[2-(6-chloropyridin-2-yl)hydrazinylidene]methyl}-6-methoxyphenolato)- μ -formato-tetramanganese(II), [Mn4(C13H11ClN3O2)2(C2H3O2)5.168(CHO2)0.832], 1, hexa- μ 2-acetato-bis( μ 2-2-{[2-(6-bromopyridin-2-yl)hydrazinylidene]methyl}-6-methoxyphenolato)tetramanganese(II), [Mn4(C13H11BrN3O2)2(C2H3O2)6], 2, and catena-poly[[ μ 2-acetato-acetatoaqua( μ 2-2-{[2-(6-chloropyridin-2-yl)hydrazinylidene]methyl}-6-methoxyphenolato)dimanganese(II)]- μ 2-acetato], [Mn2(C13H11ClN3O2)(C2H3O2)3(H2O)]n, 3, have been synthesized using solvothermal methods. Complexes 1 – 3 were characterized by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction. Complexes 1 and 2 are tetranuclear manganese clusters, while complex 3 has a one-dimensional network based on tetranuclear Mn4(L1)2(CH3COO)6(H2O)2 building units (L1 is 2-{[2-(6-chloropyridin-2-yl)hydrazinylidene]methyl}-6-methoxyphenolate). Magnetic studies reveal that complexes 1 – 3 display dominant antiferromagnetic interactions between MnII ions through μ 2-O bridges. In addition, 1 – 3 also display favourable electrochemiluminescence (ECL) properties.

Source: Acta Crystallographica Section C - February 12, 2020 Category: Chemistry Authors: Chen, Y. Zhang, S. Xiao, Y. Zhang, S. Tags: magnetic property electrochemicaluminescence ECL crystal structure manganese one-dimensional coordination polymer research papers Source Type: research