Structural and Chemical Effects of the Surrounding Cations and Coexisting Compounds on [M(α-PW11O39)2]n

Jun Iijima; Haruo Naruke; Ryuta X Suzuki

doi:10.1021/acsomega.3c00711

Structural and Chemical Effects of the Surrounding Cations and Coexisting Compounds on [M(α-PW₁₁O₃₉)₂]ⁿ

ACS Omega. 2023 Mar 3;8(10):9673-9683. doi: 10.1021/acsomega.3c00711. eCollection 2023 Mar 14.

Authors

Jun Iijima¹, Haruo Naruke², Ryuta X Suzuki¹

Affiliations

¹ Department of Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei city, Tokyo 184-8588, Japan.
² University Research Administrator (URA), Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan.

Abstract

The effects of countercations and coexisting compounds on the molecular structure of the [M(α-PW₁₁O₃₉)₂] ^n- polyanion were analyzed in terms of the repulsion and twisting of two [α-PW₁₁O₃₉]^7- units. More specifically, it was found that two [α-PW₁₁O₃₉]^7- ions approached one another upon reducing the ionic radius of M in [M(α-PW₁₁O₃₉)₂] ^n-. The interactive twisting of the [α-PW₁₁O₃₉]^7- units prevented mutual repulsion of the units containing terminal O atoms, and the tendency for approach and twisting of the [α-PW₁₁O₃₉]^7- units varied as a function of the type of countercation and the presence of coexisting compounds. Overall, this study demonstrated that some interactions between the counteraction and coexisting compounds with [M(α-PW₁₁O₃₉)₂] ^n- determined the molecular conformation and the isolated form of the polyanion.