Synthesis and characterization of multinuclear manganese-containing tungstosilicates.
The five manganese-containing, Keggin-based tungstosilicates [Mn(II)3(OH)3(H2O)3(A-α-SiW9O34)](7-) (1), [Mn(III)3(OH)3(H2O)3(A-α-SiW9O34)](4-) (2), [Mn(III)3(OH)3(H2O)3(A-β-SiW9O34)](4-) (3), [Mn(III)3Mn(IV)O3(CH3COO)3(A-α-SiW9O34)](6-) (4), and [Mn(III)3Mn(IV)O3(CH3COO)3(A-β-SiW9O34)](6-) (5) were synthesized in aqueous medium by interaction of [A-α-SiW9O34](10-) or [A-β-SiW9O34H](9-) with either MnCl2 (1) or [Mn(III)8Mn(IV)4O12(CH3COO)16(H2O)4] (2-5) under carefully adjusted reaction conditions. The obtained salts of these polyanions were analyzed in the solid state by single-crystal X-ray diffraction, IR spectroscopy, and thermogravimetric analysis. The salts of polyanions 1, 2, and 4 were further characterized in the solid state by magnetic studies, as well as in solution by electrochemistry.
School of Engineering and Science, Jacobs University , P.O. Box 750561, 28725 Bremen, Germany.
Rami
R
Al-Oweini
Bassem S
BS
Bassil
Jochen
J
Friedl
Veronika
V
Kottisch
Masooma
M
Ibrahim
Marie
M
Asano
Bineta
B
Keita
Ghenadie
G
Novitchi
Yanhua
Y
Lan
Annie
A
Powell
Ulrich
U
Stimming
Ulrich
U
Kortz
D008345:Manganese / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D017640:Silicates / Q000138:chemical synthesis* / Q000737:chemistry; D017973:Tungsten Compounds / Q000138:chemical synthesis* / Q000737:chemistry
D017640:Silicates; D017973:Tungsten Compounds; D008345:Manganese