Design, structure and magnetic properties of a novel one-dimensional Mn(II) coordination polymer constructed from 4-pyridyl-NH-1,2,3-triazole.

A one-dimensional manganese(II) complex, [Mn( L 2 )] n ( 1 , HL = 4-pyridyl- NH -1,2,3-triazole), has been hydrothermally synthesized at 120 °C. In the structure of 1 , the Mn(II) ions are octahedral coordinated and further bridged by L − ligands, forming a rigid 1D ribbon coordination chain. Varieties of supramolecular interactions, such as hydrogen bonds and C H ⋯ π interactions, play an important role on the stabilization of the structures. As revealed by magnetic measurement, complex 1 displays weak antiferromagnetic interaction with θ = –4.83 K, the best fit using Fisher's 1D Heisenberg model gives the intrachain magnetic coupling constant J = –0.21 cm − 1 above 30 K due to the neighboring Mn(N–N) 2 Mn rings twisted in the angle of almost 90°. [ABSTRACT FROM AUTHOR]