Synthesis, characterization and properties of the alpha-K-7[GaW11Ti(O-2)O-39]center dot 11H(2)O heteropolyanion

Authors
Meng, L Zhan, XP
Citation
L. Meng et Xp. Zhan, Synthesis, characterization and properties of the alpha-K-7[GaW11Ti(O-2)O-39]center dot 11H(2)O heteropolyanion, TRANSIT MET, 26(4-5), 2001, pp. 448-450
Citations number
10
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
TRANSITION METAL CHEMISTRY
ISSN journal
03404285 → ACNP
Volume
26
Issue
4-5
Year of publication
2001
Pages
448 - 450
Database
ISI
SICI code
0340-4285(2001)26:4-5<448:SCAPOT>2.0.ZU;2-Z
Abstract
The peroxotitanium-substituted heteropolytungstate alpha -K-7[GaW11Ti(O-2)O (3)9] . 11H(2)O has been prepared and characterized by elemental analysis, i.r., u.v., W-183-n.m.r. and by electrochemistry. The W-183-n.m.r. spectrum consists of six lines with intensity ratio 2:2:1:2:2:2, indicating that th e TiO2 occupies the empty octahedral site of the alpha -K-9[GaW11O39] . xH( 2)O anion forming a polyanion with C-s symmetry. The characteristic charge- transfer absorption band O-2(2-) --> Ti at 385 nm occurs in the u.v. spectr um. The polargraphic reduction potential of O-2(2-) at ca. + 0.95 V has bee n determined.