Microwave-Assisted Stepwise Synthesis and Typically Metamagnetic Behavior of a Unique Two-Dimensional Net-Based Material Based on Linear Cu(II)-Azido Chains Mediated by Discrete Cu(II) Segments

A unique two-dimensional layer-based material [Cu(μ1,1-N3)2(H2O)][CuL2] (1, L = 2-methylpyrazine-5-carboxylate) was produced by a stepwise, microwave-assisted synthesis, featuring linear Cu(II)-μ1,1-azido chains mediated by discrete CuL2 motifs. The mutual stabilization of the zero-dimensional and one-dimensional motifs in the unusual crystalline lattice of 1 is achieved by both coordination and supramolecular interactions. As a consequence, this material represents a novel copper(II)-based metamagnet resulting from the nature of the strong intrachain ferromagnetic coupling versus the weak interchain antiferromagnetic coupling.