Se-Rich Multinuclear Er-Containing Dawson-type Poly(selenotungstate).

Area of Science:

• Inorganic Chemistry
• Materials Science
• Catalysis

Background:

• Polyoxometalates (POMs) are versatile inorganic clusters with diverse applications.
• Dawson-type poly(selenotungstates) are less explored but show promise for unique structural motifs and functionalities.
• Erbium (Er)-containing POMs are of interest for their magnetic and catalytic properties.

Purpose of the Study:

• To synthesize a novel multinuclear Er-containing Dawson-type poly(selenotungstate).
• To characterize the unique structure of the synthesized polyoxoanion.
• To evaluate the catalytic performance of the material in oxidative decontamination reactions.

Main Methods:

• One-pot assembly synthesis using an excess selenotungstate source.
• Structural characterization of the polyoxoanion using X-ray diffraction and other analytical techniques.
• Catalytic evaluation through the oxidative decontamination of 2-chloroethyl ethyl sulfide (CEES).

Main Results:

• Successful synthesis of a novel Er-containing Dawson-type poly(selenotungstate), [H2N(CH3)2]12Na8Cs6H26 [Er12Se14W12O72(H2O)6(Se2W14O52)6]·78H2O (1).
• The polyoxoanion features an unprecedented {Er12Se14W12} cluster core with a trefoil-shaped configuration, surrounded by six {Se2W14} fragments, representing the most Se-containing Dawson-type structure to date.
• Compound 1 exhibited remarkable catalytic performance in the oxidative decontamination of CEES to CEESO, showing high conversion, selectivity, and reusability.

Conclusions:

• A novel and complex Er-containing poly(selenotungstate) with a unique structural architecture has been synthesized.
• The material demonstrates significant potential as a catalyst for the detoxification of harmful sulfur compounds.
• This work expands the scope of polyoxometalate chemistry and highlights their utility in environmental remediation.