Aggregation of Giant Cerium–Bismuth Tungstate Clusters into a 3D Porous Framework with High Proton Conductivity. Liu, J., Han, Q., Chen, L., Zhao, J., Streb, C., & Song, Y. Angewandte Chemie - International Edition, 2018.
abstract   bibtex   
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim The exploration of high nuclearity molecular metal oxide clusters and their reactivity is a challenge for chemistry and materials science. Herein, we report an unprecedented giant molecular cerium–bismuth tungstate superstructure formed by self-assembly from simple metal oxide precursors in aqueous solution. The compound, [W14CeIV6O61]([W3Bi6CeIII3(H2O)3O14][B-α-BiW9O33]3)234−was identified by single-crystal X-ray diffraction and features 104 metal centers, a relative molar mass of ca. 24 000 and is ca. 3.0×2.0×1.7 nm3in size. The cluster anion is assembled around a central Ce6 octahedron which is stabilized by several molecular metal oxide shells. Six trilacunary Keggin anions ([B-α-BiW9O33]9−) cap the superstructure and limit its growth. In the crystal lattice, water-filled channels with diameters of ca. 0.5 nm are observed, and electrochemical impedance spectroscopy shows pronounced proton conductivity even at low temperature.
@article{
 title = {Aggregation of Giant Cerium–Bismuth Tungstate Clusters into a 3D Porous Framework with High Proton Conductivity},
 type = {article},
 year = {2018},
 identifiers = {[object Object]},
 keywords = {polyoxometalates,polyoxotungstate,porous materials,proton conduction,self-assembly},
 volume = {57},
 id = {1bdab58d-2f0b-3b26-a084-ae31d5855444},
 created = {2018-07-17T05:04:37.489Z},
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 last_modified = {2018-07-17T05:04:37.489Z},
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 abstract = {© 2018 Wiley-VCH Verlag GmbH  &  Co. KGaA, Weinheim The exploration of high nuclearity molecular metal oxide clusters and their reactivity is a challenge for chemistry and materials science. Herein, we report an unprecedented giant molecular cerium–bismuth tungstate superstructure formed by self-assembly from simple metal oxide precursors in aqueous solution. The compound, [W14CeIV6O61]([W3Bi6CeIII3(H2O)3O14][B-α-BiW9O33]3)234−was identified by single-crystal X-ray diffraction and features 104 metal centers, a relative molar mass of ca. 24 000 and is ca. 3.0×2.0×1.7 nm3in size. The cluster anion is assembled around a central Ce6 octahedron which is stabilized by several molecular metal oxide shells. Six trilacunary Keggin anions ([B-α-BiW9O33]9−) cap the superstructure and limit its growth. In the crystal lattice, water-filled channels with diameters of ca. 0.5 nm are observed, and electrochemical impedance spectroscopy shows pronounced proton conductivity even at low temperature.},
 bibtype = {article},
 author = {Liu, J.-C. and Han, Q. and Chen, L.-J. and Zhao, J.-W. and Streb, C. and Song, Y.-F.},
 journal = {Angewandte Chemie - International Edition},
 number = {28}
}

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