Enhanced single-chain magnet behavior via anisotropic exchange in a cyano-bridged Mo(III)-Mn(II) chain.

Anisotropic magnetic exchange is of great value for the design of high performance molecular nanomagnets. In the present work, enhanced single-chain magnet (SCM) behavior is observed for a Mo III -Mn II chain that exhibits anisotropic magnetic exchange. Self-assembly of the pentagonal bipyramidal [Mo(CN) 7 ] 4- anion and the Mn II unit with a tridentate ligand results in a neutral double zigzag 2,4-ribbon structure which exhibits SCM behavior with a high relaxation barrier of 178(4) K. Open magnetic hysteresis loops are observed below 5.2 K, with a coercive field of 1.5 T at 2 K. Interestingly, this SCM can be considered to be a result of a step-by-step process based on our previously reported Mn 2 Mo single-molecule magnets (SMMs).