Structural cutting and recombining in layered sodium dysprosium phosphonate: key roles of flexible pyrazinyl hydrazone molecular tools

Abstract

The elaborate collocation of a layered structure employing sodium dysprosium 1-naphthylphosphonate and a flexible monopyrazinyl hydrazone molecular tool reacting with (E)-N′-(2-hydroxy-3-methoxybenzylidene)pyrazine-2-carbohydrazide results in the formation of a cut heterometallic hendecanuclear cluster {Na₅Dy₆(O₃PC₁₀H₇)₅(μ₃-opch)₆(H₂O)₄}·2.0CH₃OH·0.5H₂O (1) and a recombined two-dimensional Archimedean topology {Na₄Dy₈(O₃PC₁₅H₁₁)₈(μ₄-opch)₂(μ₃-opch)₂(μ₃-O)₂(μ₂-O)₂(AcO)₂(H₂O)₃(CH₃OH)₂}_∞·1.5CH₃OH·5.5H₂O (2). This all-encompassing synthetic approach is the first report of a recombinant layer sodium dysprosium phosphonate through the triple N-bridges of pyrazinyl groups. Both exhibit slow relaxation phenomena at low temperatures.