Speciation of Molybdenum(VI) in Chloride Media at Elevated Mo Concentrations

被引：11

作者：

Bettinardi, David J. ^{[1
,2
]}

Paulenova, Alena ^{[1
]}

Tkac, Peter ^{[2
]}

机构：

[1] Oregon State Univ, Sch Nucl Sci & Engn, Corvallis, OR 97330 USA

[2] Argonne Natl Lab, Chem & Fuel Cycle Technol Div, Lemont, IL 60439 USA

来源：

ACS OMEGA | 2020年 / 5卷 / 37期

关键词：

EQUILIBRIA; SPECTROSCOPY; POLYNUCLEAR; MONONUCLEAR; RAMAN; ACID;

D O I：

10.1021/acsomega.0c02858

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Speciation of Mo(VI) in chloride media (0.5-11 M HCl) at elevated Mo concentrations (0.1-300 mM Mo) was investigated using UV spectroscopy. In addition to five major monomeric species, H2MoO4, H3MoO4+, H3MoO4Cl, MoO2Cl2, and MoO2Cl3-, chemometric analysis of UV spectra suggests the presence of three cationic dinuclear species that predominate in solutions of 1-4.5 M HCl at >20 mM Mo concentrations. Thermodynamic values and molar absorptivity spectra were calculated from UV spectrophotometric data using refined numerical methods. The stability constants determined for three Mo dimers are log beta = 3.53 +/- 0.05 (H2Mo2O52+), log beta = 3.60 +/- 0.04 (H3Mo2O53+), and log beta = 2.91 +/- 0.03 (H3Mo2O6Cl2+).

引用

页码：23786 / 23792

页数：7

共 24 条

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