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Wang Q, Liu Z, Xia M, Song YF, Chai Z, Wang D. Biphasic Behaviors of Nd 3+ Bound with Cyanex272, Cyanex301, and Cyanex302: A Molecular Dynamics Simulation Study. Inorg Chem 2022; 61:8920-8929. [PMID: 35649185 DOI: 10.1021/acs.inorgchem.2c01118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
By means of molecular dynamics simulations, this work addresses the conformational flexibility and migration of trivalent neodymium (Nd3+) coordinated with three or six titled (thio)phosphinic ligands and shows that the fluxionality of the complexes enables them to adapt to the solvent environment during the migration. Cyanex272 forms a more compact complex than the other two types of ligands and screens more significantly the interaction between the water solvent and the metal ion in the complex, which weakens the detainment of the aqueous environment. This results in faster motion of the Nd(C272)3 complex both in its translation and rotation than the other complexes when migrating to the organic phase and wins over the other two ligands in transporting the metal ions from the aqueous phase to the organic phase. Depending on the solvent environment, these complexes may take two types of conformations to balance the forces from the environment benefited from their fluxionality. The migration of the M:L = 1:6 complexes, Nd[H(C272)2]3 and Nd[H(C301)2]3, was also investigated. The rich presence of the alkyl groups in the complexes screens the influence of the aqueous environment and benefits the transportation of metal ions to the interface. This work is expected to contribute to the community of inorganic chemistry interested in the coordination chemistry of metal ions and their behaviors in the condensed phase.
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Affiliation(s)
- Qin Wang
- State Key Laboratory of Chemical Resource Engineering, School of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China.,State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ziyi Liu
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Miaoren Xia
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Yu-Fei Song
- State Key Laboratory of Chemical Resource Engineering, School of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zhifang Chai
- State Key Laboratory of Radiation Medicine and Protection, and School of Radiation Medicine and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, Jiangsu 215123, China.,Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Dongqi Wang
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.,Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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