Constructing Magnetic Molecular Solids by Employing Three‐Atom Ligands as Bridges

Abstract

The combination of some three-atom bridges with paramagnetic 3d transition metal ions results in the systematic isolation of molecular magnetic materials, ranging from single-molecule and singlechain magnets to layered weak ferromagnets and three-dimensional porous magnets. The design strategy and role of secondary components, such as co-ligands, templates and other mixed short ligands are discussed.

Synthesis, crystal growth, structural and magnetic characterization of NH4MCl2(HCOO), M=(Fe, Co, Ni)

“…One class of compounds for which this methodology is particularly well--suited is the range of transition metal (II) formates, which can form a variety of structures ranging from mesoporous 3D frameworks [2,3] to isolated 1D chains [4]. As these structures are usually composed of M 2+ octahedra linked by various 1--or 3--atom bridging ligands [5], they often exhibit rather exotic magnetic interactions and are of interest as low--dimensional, highly anisotropic magnetic materials [6] and potentially as multiferroics [7]. We Figure 1.…”

Crystal structure of (diazido-2,3κ1N)-bis(μ2-azido-2:3κ1N)-((bis(ethane- 1,2-diylbis((1-(2-oxidophenyl)ethyl)amido))-1κ4N,N',O,O':2κ2O,O'- 4κ4N'',N''',O'',O''':3κ2O'',O''')tetracopper(II), C36H36Cu4N16O4

“…As we known, the azido anion is af avorite bridging ligand for constructing magnetic molecule materials due to its versatile coordination modes and efficient mediating different types of magnetic exchange interactions [1]. In particularly, alarge number of copper-azido compounds with interesting topologies have been well documented thanks to many possible bridging modes of the azido ligand and flexible coordination numbers of the Cu(II) ion [2][3][4][5][6][7].The molecular structure of the title compound consists of centrosymmetric tetranuclear molecule of formula [Cu 4 (mesalen) 2 (m 1,1 -N 3 ) 2 (N 3 ) 2 ](mesalen =(bis(ethane-1,2-diylbis((1-(2-oxidophenyl)ethyl)amido)), whicha re similara sthe previous tetranuclear copper compounds [8].…”

“…While, the central copper Cu(2) ions takes on a square pyramid geometry with two phenoxo oxygen atomsfrom one ligand, and three nitrogen atomsfrom one terminal azido and two bridging azido ligands respectively. In the title compound, the bond lengths of Cu-O are in the range of 1 ( …”

Recent Advances as Materials of Functional Metal‐Organic Frameworks

“…Magnetic MOFs and molecular magnets reported with their designs, synthetic approaches, structures, and physical properties [25][26][27][28][29][30][31][32][33] are both branches of coordination chemistry where metals are bound in a solid by coordination bonds to organic linkers. There exist several reviews dealing with the different aspects of magnetism [34][35][36][37][38].…”