1 research outputs found
One-Dimensional and Two-Dimensional Anilate-Based Magnets with Inserted Spin-Crossover Complexes
The syntheses, structures, and magnetic
properties of a family
of bimetallic anilate-based compounds with inserted spin-crossover
cationic complexes are reported. The structures of <b>1</b>ā<b>4</b> present a two-dimensional anionic network formed by MnĀ(II)
and CrĀ(III) ions linked through anilate ligands with inserted [Fe<sup>III</sup>(sal<sub>2</sub>-trien)]<sup>+</sup> (<b>1</b>), [Fe<sup>III</sup>(4-OH-sal<sub>2</sub>-trien)]<sup>+</sup> (<b>2</b>), [Fe<sup>III</sup>(sal<sub>2</sub>-epe)]<sup>+</sup> (<b>3</b>), or [Fe<sup>III</sup>(5-Cl-sal<sub>2</sub>-trien)]<sup>+</sup> (<b>4</b>) complexes. The structure of <b>5</b> is formed by
anionic [Mn<sup>II</sup>Cl<sub>2</sub>Cr<sup>III</sup>(Cl<sub>2</sub>An)<sub>3</sub>]<sup>3ā</sup> chains surrounded by [Fe<sup>II</sup>(trenĀ(imid)<sub>3</sub>)]<sup>2+</sup>, Cl<sup>ā</sup>, and solvent molecules. The magnetic properties indicate that <b>1</b>ā<b>4</b> undergo a long-range ferrimagnetic
ordering at ca. 10 K. On the other hand, the inserted FeĀ(III) cations
remain in the low-spin (in <b>4</b>) or high-spin state (in <b>1</b>, <b>2</b>, and <b>3</b>). In the case of <b>5</b>, half of the inserted FeĀ(II) cations undergo a complete
and gradual spin crossover from 280 to 90 K that coexists with a magnetic
ordering below 2.5 K