A Ni(II) ferromagnet with mixed pyridine-3,5-dicarboxylate-1,4-bis(imidazol-l-yl)butane heterobridges exhibiting long-range ordering and hysteresis loop

Abstract A rare Ni-ferromagnet [Ni(pdc)(bib)]·2H 2 O (H 2 pdc = pyridine-3,5-dicarboxylic acid, bib = 1,4-bis (imidazol-l-yl)butane) has been prepared, which possesses a 3D supramolecular network based on (3,5)-connected helical-armed 2D layers. Interestingly, at high temperature (> 12.7 K), 1 exhibits a weak ferromagnetism, whereas at low temperature, it shows unusual long-range ordering (LRO) behaviors combining spin canting and hysteresis loop.