Multinuclear cobalt(II)-containing heteropolytungstates: structure, magnetism, and electrochemistry.
Interaction of the trilacunary Keggin polyanions [A-α-XW9O34](10-) (X = Si(IV), Ge(IV)) with Co(II) and phosphate ions in aqueous, basic media and under mild heating leads to the formation of the tetrameric, Co16-containing heteropolytungstates [{Co4(OH)3PO4}4(A-α-XW9O34)4](32-) (X = Si(IV), Ge(IV)). Both polyanions were characterized in the solid state by single-crystal X-ray diffraction, IR spectroscopy, and thermogravimetric and elemental analyses. Furthermore, the electrochemical and magnetic properties of these isostructural polyanions were investigated.
School of Engineering and Science, Jacobs University , P.O. Box 750 561, 28725 Bremen, Germany.
Masooma
M
Ibrahim
Ali
A
Haider
Yanhua
Y
Lan
Bassem S
BS
Bassil
Akina M
AM
Carey
Rongji
R
Liu
Guangjin
G
Zhang
Bineta
B
Keita
Wenhui
W
Li
George E
GE
Kostakis
Annie K
AK
Powell
Ulrich
U
Kortz
D003035:Cobalt / Q000737:chemistry*; D018360:Crystallography, X-Ray; D055664:Electrochemical Techniques; D060328:Magnetic Phenomena; D008958:Models, Molecular; D015394:Molecular Structure; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
D003035:Cobalt; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates