Study of the Equilibrium of Formation of Arsenic(III) Lacunar Heteropolytungstates by Raman Spectroscopy Full article
Journal |
Russian Chemical Bulletin
ISSN: 1066-5285 , E-ISSN: 1573-9171 |
||
---|---|---|---|
Output data | Year: 2003, Volume: 52, Number: 2, Pages: 370-374 Pages count : 5 DOI: 10.1023/A:1023454715292 | ||
Tags | Arsenic(III), Equilibrium constant, Heteropolyanions, Heteropolytungstates, Ion equilibria, IR spectra, Raman spectroscopy | ||
Authors |
|
||
Affiliations |
|
Abstract:
The formation of lacunar heteropolyanions (HPA): [AsW9O33]9–, [As2W19O67(H2O)]14–, and [As2W20O68(H2O)]10– in aqueous solutions was investigated by Raman spectroscopy at [Na2HAsO3]0 = 0.1, [Na2WO4]0 = 0.9 mol L–1 and pH 9.4–1.6. The [AsW9O33]9– HPA is characterized by the most intense band ns (W=O) at 948 cm–1 retaining its position in the pH range from 8.9 to 7.5. Under these conditions, the equilibrium constant of [AsW9O33]9– formation from H2AsO3 – and WO4 2– ions was estimated (logK = 87.0±1.0). The asymmetrical band at 952 cm–1 corresponding to Hx[As2W19O67(H2O)](14–x)– shifts to 960 cm–1 as the pH decreases from 6.5 to 5.5, which is due to the change in HPA protonation. The [As2W20O68(H2O)]10– HPA is formed at pH 3.1—1.6; it is characterized by a band at 972 cm–1.
Cite:
Detusheva L.G.
, Kuznetsova L.I.
, Dovlitova L.S.
, Likholobov V.A.
Study of the Equilibrium of Formation of Arsenic(III) Lacunar Heteropolytungstates by Raman Spectroscopy
Russian Chemical Bulletin. 2003. V.52. N2. P.370-374. DOI: 10.1023/A:1023454715292 WOS Scopus РИНЦ
Study of the Equilibrium of Formation of Arsenic(III) Lacunar Heteropolytungstates by Raman Spectroscopy
Russian Chemical Bulletin. 2003. V.52. N2. P.370-374. DOI: 10.1023/A:1023454715292 WOS Scopus РИНЦ
ArticleLinkType.TRANSLATED_TO_ORIGINAL:
Детушева Л.Г.
, Кузнецова Л.И.
, Довлитова Л.С.
, Лихолобов В.А.
Изучение равновесия образования лакунарных гетерополивольфраматов мышьяка(III) методом спектроскопии КР
Известия Академии наук. Серия химическая. 2003. №2. С.354-358. РИНЦ
Изучение равновесия образования лакунарных гетерополивольфраматов мышьяка(III) методом спектроскопии КР
Известия Академии наук. Серия химическая. 2003. №2. С.354-358. РИНЦ
Dates:
Submitted: | Jul 8, 2002 |
Published print: | Feb 1, 2003 |
Identifiers:
Web of science | WOS:000183622900010 |
Scopus | 2-s2.0-0038365492 |
Elibrary | 13427103 |
Chemical Abstracts | 2003:305987 |
Chemical Abstracts (print) | 139:236111 |
OpenAlex | W149783525 |