Volume 57, Issue 48 pp. 15777-15781
Communication

All-Inorganic Ionic Porous Material Based on Giant Spherical Polyoxometalates Containing Core-Shell K6@K36-Water Cage

Zhong Li

Zhong Li

State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108 China

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Li-Dan Lin

Li-Dan Lin

State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108 China

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Hao Yu

Hao Yu

State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108 China

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Dr. Xin-Xiong Li

Dr. Xin-Xiong Li

State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108 China

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Prof. Dr. Shou-Tian Zheng

Corresponding Author

Prof. Dr. Shou-Tian Zheng

State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108 China

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First published: 19 October 2018
Citations: 85

Graphical Abstract

Giant ionic cluster: The utilization of highly negative polyoxometalates for the clustering of alkali metal cations has allowed the synthesis of a rare all-inorganic ionic porous material built from novel giant ionic clusters {K42Ge8W72O272(H2O)60} (K42W72), which exhibits high proton conductivity. The K42W72 not only is among the largest ionic clusters but also contains unprecedented core–shell K6@K36-H2O cage.

Abstract

This work demonstrates that the use of high-negative and high-symmetry lacunary polyoxometalates (POMs) for the clustering of alkali metal ions is a feasible strategy not only for the formation of rare high-nuclearity alkali-metal clusters but also for the construction of new-type all-inorganic ionic porous materials. By the strategy, an unprecedented high-nuclearity K-H2O cluster {K42(H2O)60} with core–shell K6@K36 configuration is stabilized by 8 C3v-symmetry trivacant POMs [GeW9O34]10−, forming a novel giant ionic alkali-metal-POM composite cluster {K42Ge8W72O272(H2O)60} with more than 100 metal centers. The incorporated 42-nuclearity K-H2O cluster {K42(H2O)60} exhibits the highest-nuclearity alkali-metal-water cluster known to date in POM chemistry. Further, the giant {K42Ge8W72O272(H2O)60} clusters can be linked by another kind of alkali metal ions Na+ to generate a fascinating three-dimensional all-inorganic ionic porous framework with high chemical stability, proton conductivity, and water vapor adsorption.

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