SYNTHESIS AND PROPERTIES OF ALPHA-MOLYBDO TUNGSTONIOBIC DIPHOSPHATES

Authors
QU LY GONG J PENG J SUN SR ZHANG JG
Citation
Ly. Qu et al., SYNTHESIS AND PROPERTIES OF ALPHA-MOLYBDO TUNGSTONIOBIC DIPHOSPHATES, Gaodeng xuexiao huaxue xuebao, 16(1), 1995, pp. 5-8
Citations number
9
Categorie Soggetti
Chemistry
Journal title
Gaodeng xuexiao huaxue xuebao → ACNP
ISSN journal
02510790
Volume
16
Issue
1
Year of publication
1995
Pages
5 - 8
Database
ISI
SICI code
0251-0790(1995)16:1<5:SAPOAT>2.0.ZU;2-V
Abstract
Four kinds of new molybdotungstoniobic diphosphates with the Dawson st ructure, formulated as alpha-P2W15Mo2Nb62(7-), are prepared and charac terized by IR, UV spectra, polarography and W-183 NMR which show that the same ''polar'' W atoms in the Dawson frames-are substituted. The m ean value of W-183 chemical shifts of the ''polar'' group varies linea rly with the number of substituted atoms in the opposite polar group.