Coacervate Formation in Dilute Aqueous Solutions of Inorganic Molecular Clusters with Simple Divalent Countercations

Kexing Xiao; Yuqing Yang; Xiaohan Xu; Jennifer E.S. Szymanowski; Yifan Zhou; Ginger E. Sigmon; Peter C. Burns; Tianbo Liu

doi:10.1021/acs.inorgchem.4c02103

Coacervate Formation in Dilute Aqueous Solutions of Inorganic Molecular Clusters with Simple Divalent Countercations

Kexing Xiao
, Yuqing Yang
, Xiaohan Xu
, Jennifer E.S. Szymanowski
, Yifan Zhou
, Ginger E. Sigmon
, Peter C. Burns
, Tianbo Liu

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We report a complex coacervate formed by a 2.5 nm-diameter, rigid uranyl peroxide molecular cluster (Li₆₈K₁₂(OH)₂₀)[UO₂(O₂)OH]₆₀, U₆₀⁶⁰⁻) and SrCl₂ salt in dilute aqueous solutions, including its location in the phase diagram, composition, rheological features, and critical conditions for phase transitions. In this coacervate, the Sr²⁺ cations are a major building component, and the coacervate phase covers a substantial region of the phase diagram. This coacervate demonstrates features that differ from traditional coacervates formed by oppositely charged long-chain polyelectrolytes, especially in its formation mechanism, dehydration, enhancement of mechanical strength with increasing ionic strength, and the change of salt partition preference into the coacervate and supernatant phases with ionic strength.

Original language	English
Pages (from-to)	15331-15339
Number of pages	9
Journal	Inorganic Chemistry
Volume	63
Issue number	33
DOIs	https://doi.org/10.1021/acs.inorgchem.4c02103
State	Published - Aug 19 2024
Externally published	Yes

Funding

T.L. acknowledges support from the National Science Foundation (NSF DMR2215190) and the University of Akron. P.C.B. acknowledges support from the University of Notre Dame.

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10.1021/acs.inorgchem.4c02103

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title = "Coacervate Formation in Dilute Aqueous Solutions of Inorganic Molecular Clusters with Simple Divalent Countercations",

abstract = "We report a complex coacervate formed by a 2.5 nm-diameter, rigid uranyl peroxide molecular cluster (Li68K12(OH)20)[UO2(O2)OH]60, U6060−) and SrCl2 salt in dilute aqueous solutions, including its location in the phase diagram, composition, rheological features, and critical conditions for phase transitions. In this coacervate, the Sr2+ cations are a major building component, and the coacervate phase covers a substantial region of the phase diagram. This coacervate demonstrates features that differ from traditional coacervates formed by oppositely charged long-chain polyelectrolytes, especially in its formation mechanism, dehydration, enhancement of mechanical strength with increasing ionic strength, and the change of salt partition preference into the coacervate and supernatant phases with ionic strength.",

author = "Kexing Xiao and Yuqing Yang and Xiaohan Xu and Szymanowski, \{Jennifer E.S.\} and Yifan Zhou and Sigmon, \{Ginger E.\} and Burns, \{Peter C.\} and Tianbo Liu",

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doi = "10.1021/acs.inorgchem.4c02103",

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T1 - Coacervate Formation in Dilute Aqueous Solutions of Inorganic Molecular Clusters with Simple Divalent Countercations

AU - Xiao, Kexing

AU - Yang, Yuqing

AU - Xu, Xiaohan

AU - Szymanowski, Jennifer E.S.

AU - Zhou, Yifan

AU - Sigmon, Ginger E.

AU - Burns, Peter C.

AU - Liu, Tianbo

PY - 2024/8/19

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N2 - We report a complex coacervate formed by a 2.5 nm-diameter, rigid uranyl peroxide molecular cluster (Li68K12(OH)20)[UO2(O2)OH]60, U6060−) and SrCl2 salt in dilute aqueous solutions, including its location in the phase diagram, composition, rheological features, and critical conditions for phase transitions. In this coacervate, the Sr2+ cations are a major building component, and the coacervate phase covers a substantial region of the phase diagram. This coacervate demonstrates features that differ from traditional coacervates formed by oppositely charged long-chain polyelectrolytes, especially in its formation mechanism, dehydration, enhancement of mechanical strength with increasing ionic strength, and the change of salt partition preference into the coacervate and supernatant phases with ionic strength.

AB - We report a complex coacervate formed by a 2.5 nm-diameter, rigid uranyl peroxide molecular cluster (Li68K12(OH)20)[UO2(O2)OH]60, U6060−) and SrCl2 salt in dilute aqueous solutions, including its location in the phase diagram, composition, rheological features, and critical conditions for phase transitions. In this coacervate, the Sr2+ cations are a major building component, and the coacervate phase covers a substantial region of the phase diagram. This coacervate demonstrates features that differ from traditional coacervates formed by oppositely charged long-chain polyelectrolytes, especially in its formation mechanism, dehydration, enhancement of mechanical strength with increasing ionic strength, and the change of salt partition preference into the coacervate and supernatant phases with ionic strength.

UR - https://www.scopus.com/pages/publications/85201090871

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DO - 10.1021/acs.inorgchem.4c02103

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EP - 15339

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 33

ER -

Coacervate Formation in Dilute Aqueous Solutions of Inorganic Molecular Clusters with Simple Divalent Countercations

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