Effect of Reaction Time on Lanthanide Borate Perrhenate Complexes

Area of Science:

• Inorganic Chemistry
• Materials Science
• Crystallography

Background:

• Lanthanide borates are an important class of inorganic compounds.
• Trivalent lanthanide complexes with perrhenate anions are less explored.
• Understanding structure-property relationships in these materials is crucial.

Purpose of the Study:

• To synthesize and structurally characterize new trivalent lanthanide borate perrhenate compounds.
• To investigate the influence of perrhenate coordination and reaction parameters on the resulting structures.
• To explore the formation of novel 3D borate framework materials.

Main Methods:

• Single-crystal X-ray diffraction for structural determination.
• Hydrothermal synthesis techniques.
• Spectroscopic analysis.

Main Results:

• Six new isostructural trivalent lanthanide borate perrhenate compounds were prepared.
• Structures feature 10-coordinated lanthanides in a capped triangular cupola geometry.
• Framework structures differ based on terminal vs. bridging perrhenate groups and basal ligands.
• Formation of one series is sensitive to reaction time.

Conclusions:

• The coordination mode of the perrhenate anion and basal ligands dictate the final 3D framework architecture.
• Reaction time is a critical factor in the synthesis of specific lanthanide borate perrhenate structures.
• These findings expand the library of known lanthanide-containing inorganic materials.