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

Abstract

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+).

Authors:
 [1];  [2]; ORCiD logo [3]
  1. School of Nuclear Science & Engineering, Oregon State University, 100 Radiation Center, Corvallis, Oregon 97330, United States, Chemical and Fuel Cycle Technologies Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
  2. School of Nuclear Science & Engineering, Oregon State University, 100 Radiation Center, Corvallis, Oregon 97330, United States
  3. Chemical and Fuel Cycle Technologies Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1659336
Alternate Identifier(s):
OSTI ID: 1663145; OSTI ID: 1756846
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Published Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Name: ACS Omega Journal Volume: 5 Journal Issue: 37; Journal ID: ISSN 2470-1343
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Anions; Reaction mechanisms; Absorption; Oligomers; Stability

Citation Formats

Bettinardi, David J., Paulenova, Alena, and Tkac, Peter. Speciation of Molybdenum(VI) in Chloride Media at Elevated Mo Concentrations. United States: N. p., 2020. Web. https://doi.org/10.1021/acsomega.0c02858.
Bettinardi, David J., Paulenova, Alena, & Tkac, Peter. Speciation of Molybdenum(VI) in Chloride Media at Elevated Mo Concentrations. United States. https://doi.org/10.1021/acsomega.0c02858
Bettinardi, David J., Paulenova, Alena, and Tkac, Peter. Wed . "Speciation of Molybdenum(VI) in Chloride Media at Elevated Mo Concentrations". United States. https://doi.org/10.1021/acsomega.0c02858.
@article{osti_1659336,
title = {Speciation of Molybdenum(VI) in Chloride Media at Elevated Mo Concentrations},
author = {Bettinardi, David J. and Paulenova, Alena and Tkac, Peter},
abstractNote = {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+).},
doi = {10.1021/acsomega.0c02858},
journal = {ACS Omega},
number = 37,
volume = 5,
place = {United States},
year = {2020},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1021/acsomega.0c02858

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