Efficient synthetic strategy to construct three-dimensional 4f-5d networks using neutral two-dimensional layers as...

Area of Science:

• Inorganic Chemistry
• Materials Science
• Crystallography

Background:

• The synthesis of extended 3D frameworks from lower-dimensional building blocks is a key area in coordination chemistry.
• Lanthanide-metal cyanide complexes offer diverse structural motifs and magnetic properties.

Purpose of the Study:

• To synthesize and characterize a novel 3D bimetallic complex using a 2D layer as a building block.
• To investigate the structural, magnetic, and formation mechanism of the resulting complex.

Main Methods:

• Reaction of a neutral 2D layer Tb(H(2)O)(5)W(CN)(8) with pyrazine.
• Single-crystal X-ray diffraction analysis.
• Magnetic susceptibility measurements.

Main Results:

• Formation of a 3D bimetallic complex, Tb(H(2)O)(4)(pyrazine)(0.5)W(CN)(8), with a unique structure featuring corrugated layers linked by pyrazine pillars.
• The W center is eight-coordinated (dodecahedron), and the Tb center is nine-coordinated (tricapped trigonal prism).
• Ferromagnetic interactions were observed between Tb(III) and W(V) centers.

Conclusions:

• This study presents the first structural pattern using a neutral 2D layer as a building block for 3D frameworks.
• The first 3D complex with Ln(III)-[W(V)(CN)](8) in octacyanometallate systems was achieved.
• The developed building-block methodology offers a new strategy for creating 3D functional materials, including 3D magnets in 4f-5d assemblies.