A Toroidal Zr₇₀ Oxysulfate Cluster and Its Diverse Packing Structures

Area of Science:

• Inorganic Chemistry
• Materials Science
• Crystallography

Background:

• Zirconium oxysulfates are known inorganic compounds.
• The synthesis of large, complex inorganic clusters remains a challenge.

Purpose of the Study:

• To report the discovery and characterization of a novel toroidal inorganic cluster of zirconium(IV) oxysulfate.
• To explore the structural diversity and potential properties of this new cluster.

Main Methods:

• Single-crystal X-ray diffraction to determine the crystal structure.
• Brunauer-Emmett-Teller (BET) analysis to assess surface area and porosity.

Main Results:

• Discovery of a large toroidal inorganic cluster, Zr70 (SO4)58 (O/OH)146 ·x(H2O).
• The cluster exhibits pseudo-10-fold rotational symmetry and a size exceeding 3 nm.
• Polymorphic crystal structures were observed due to different packing arrangements of the ring units.
• One phase displayed high permanent porosity (241 m²/g), indicating potential functional properties.

Conclusions:

• The discovery of Zr70 represents a significant advancement in the synthesis of large inorganic clusters.
• The observed porosity suggests potential applications in adsorption and heterogeneous catalysis.
• Further research into the functional properties and applications of this material is warranted.