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Capturing Lacunary Iron–Oxo Keggin Clusters and Insight Into the Keggin‐Fe 13 Cluster Rotational Isomerization
Author(s) -
Zheng XiuYing,
Chen ManTing,
Du MingHao,
Wei RongJia,
Kong XiangJian,
Long LaSheng,
Zheng LanSun
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202002833
Subject(s) - lacunary function , ferrihydrite , cluster (spacecraft) , isomerization , chemistry , lanthanide , dimer , polyoxometalate , ion , inorganic chemistry , crystallography , dissolution , catalysis , adsorption , organic chemistry , mathematics , computer science , pure mathematics , programming language
The formation mechanism of ferrihydrite is the key to understand its treatment of pollutants in waste water and purification of surface water and groundwater. Although emerging evidence suggests that formation of the ferrihydrite occurs through the aggregation of prenucleation clusters, rather than classical atom‐by‐atom growth, its formation mechanism remains unclear. Herein, an iron–oxo anionic cluster of [Fe 22 ( μ 4 ‐O) 8 ( μ 3 ‐OH) 20 ( μ 2 ‐OH) 18 (CH 3 COO) 16 (H 2 O) 2 ] 4− viewed as a dimer of bivacant β‐Keggin‐Fe 13 clusters was for the first time obtained by using lanthanide ions as stabilizers. Upon dissolution in a mixed solution of isopropanol and water, the lacunary β‐Keggin‐Fe 13 cluster can transform into an α‐Keggin‐Fe 13 cluster, distinctly demonstrating that the Keggin‐Fe 13 cluster rotational isomerization can be realized through the vacant Keggin‐Fe 13 cluster.