Cyano-Bridged 4f-3d Coordination Polymers with a Unique Two-Dimensional Topological Architecture and Unusual Magnetic Behavior

Abstract

Rings of 24 atoms form part of the two‐dimensional structure of the novel compounds [NdM(bpym)(H2O)4(CN)6]⋅3 H2O (M = Fe (1), Co (2); bpym = 2,2′‐bipyrimidine). These compounds are the first two‐dimensional cyano‐bridged species containing lanthanide and transition metal centers (see picture). The structures and magnetic properties are investigated.

Slow Magnetic Relaxation of Lanthanide(III) Complexes with a Helical Ligand

“…Nd(III) complex 1 showed a field-induced SMM behavior with an effective barrier of ∆E/k B = 34(2) K and relaxation rate of τ 0 −1 = 1.1(3) × 10 −8 s. The smaller J value compared with those of heavy lanthanide ions caused slow magnetic relaxation phenomena to be rarely observed for Nd(III) complexes [13][14][15][16][22][23][24], and a few known examples of Nd(III) complexes show field-induced SMM behaviors. The reported values of ∆E/k B varied from 4.09(10) to 40.0(2) K, and the height of the barrier of 1 was similar to that reported.…”

The Utility of 2,2′-Bipyrimidine in Lanthanide Chemistry: From Materials Synthesis to Structural and Physical Properties

“…It is anticipated that some of these compounds could serve as molecular building blocks for more sophisticated architectures with improved physical properties. In particular, the simultaneous use of bpm with other bridging ligands such as CN − [65,[99][100][101][102], Cl − [84], or other bridging ligands allowing an electronic interaction between two metal ions can lead to heteropolymetallic metal-organic frameworks with interesting magnetic properties.…”

Poly[tetraaquabis(μ3-oxalato-κ5O1,O2:O1′:O1′,O2′)(μ2-oxalato-κ4O1,O2:O1′,O2′)dipraseodymium(III)]

“…During the past decade, considerable efforts have been devoted to the design and construction of new lanthanide coordination polymers due to their intriguing structural diversity and potential applications in many areas (Ma et al, 2001;Shibasaki & Yoshikawa, 2002;Song et al, 2012). Oxalate owning four carboxylate O atoms is highly accessible to lanthanide ions to form novel structures.…”