Azide and carboxylate as simultaneous coupler for magnetic coordination polymers

作者：Yue, Qi; Gao, En-Qing^*

来源：Coordination Chemistry Reviews, 2019, 382: 1-31.

DOI：10.1016/j.ccr.2018.12.002

• Molecular magnetism
• Coordination polymer
• Azide
• Carboxylate
• Magnetostructural correlation
• Single-chain magnet

Azide and carboxylate are popular and versatile bridging ligands and magnetic couplers intensively used in the fields of coordination chemistry and molecular magnetism, Combining them in one compound is an interesting approach to construct new magnetic systems. In this review we focus on the structural and magnetic aspects of the coordination polymers containing azide and carboxylate as simultaneous bridges between paramagnetic metal ions. The simultaneous bridges, sometimes in collaboration with other short bridges of different types, have led to discrete, one-, two, and even three-dimensional magnetic motifs. Different from the azide- or carboxylate-only bridges, the simultaneous bridges seem to be universal antiferromagnetic couplers in Mn(II) compounds but tend to induce ferromagnetic exchange in Fe (II), Co(II), Ni(II) and Cu(II) compounds. The coordination polymers show diverse magnetic behaviors, including topological ferrimagnetism, canted antiferromagnetism, metamagnetism, long-range ordering and slow magnetic dynamics. The use of zwitterionic carboxylate ligands have been particularly fruitful in producing mixed-bridge chains, including some Co(II) and Fe(II) ferromagnetic chains behaving as single-chain magnets (SCMs). The antagonistic and synergetic effects of random metal blending on SCM behaviors are commented on. Responsive materials that undergo reversible magnetic changes in response to photoirradiation or water release/uptake are also illustrated.

• 出版日期2019-3-1
• 单位华东师范大学