Structure and magnetic properties of one carboxylate-bridged one-dimensional polymer with linear trinuclear [Co3] cluster unit

One carboxylate-bridged coordination polymer, [Co-3(MSA)(3)(H2O)(6)](n) (1), was synthesized under hydrothermal condition based on Co2+ ion and dicarboxylic acid ligand of 2-methylenesuccinic acid (H2MSA). Complex 1 has an one-dimensional (1D) linear chain structure consisting of linear trinuclear [Co-3] cluster node and mixed bridges of eta(2)-O-carboxylate and syn-syn carboxylate. The magneto-structural correlation of 1 was studied based on a new linear trinuclear [Co3] cluster magnetic model with split and summation of the mixed carboxylate bridges. The satisfying results suggest that the syn-syn carboxylate mediates antiferromagnetic interactions and the eta 2- O-carboxylate bridges with different Co-O-carboxylate-Co angles could mediate ferromagnetic (<98 degrees) or antiferro-magnetic coupling (>98 degrees), respectively.

Automated summary

A carboxylate-bridged coordination polymer with a 1D linear chain structure was synthesized using Co2+ ion and the ligand 2-methylenesuccinic acid (H2MSA). The study revealed that the syn-syn carboxylate mediates antiferromagnetic interactions, while the eta(2)-O-carboxylate bridges with different Co-O-carboxylate-Co angles could mediate ferromagnetic or antiferromagnetic coupling.