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• W3037339235 abstract "Computationally designed ion imprinted polymers (IIPs) were synthesized for selective binding of the perrhenate ion from CMSX-4 superalloy leach solutions. A library of functional monomers was screened using density functional theory (DFT) based on their binding energy with the perrhenate ion. DFT calculations were also employed to determine the template:monomer ratio of 1:2 from binding energy calculation of the complex formed, and perrhenate ion formed the most stable complex with protonated 4-vinylpyridine (4VP) at a 1:2 molecular ratio. An optimum imprinting ratio of 2:4:40 for the functional monomer:cross-linker:perrhenate ion template was calculated using molecular dynamics simulation of a fixed number of component molecules in periodic boundary and isothermal conditions (NVT-molecular dynamics) using MM+ force field. The perrhenate ion selective IIPs were synthesized via bulk polymerization, and combinatorial screening of the imprinting porogen composition was employed to compliment the computational screening. The resulted IIPs showed fast kinetics, high binding capacity (122 mg Re/g polymer), and adsorption processes governed by pseudo-second-order kinetics. The IIP synthesized using 4-vinylpyridine and ethylene glycol dimethyl acrylate (EGDMA) show superior selectivity toward perrhenate ions in the presence of the oxides, hydroxides, and chlorides of Al, Co, Cr, Hf, Mo, Ni, Ta, Ti, and W in the feed leach solution at pH = 7.0. The perrhenate ion IIPs demonstrated excellent chemical and physical stability toward extreme acidic stripping conditions and storage for an extended period. Therefore, the use of perrhenate ion imprinted polymers for separation as part of the industrial recycling of rhenium from superalloy leach solutions is recommended." @default.
• W3037339235 created "2020-07-02" @default.
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• W3037339235 date "2020-06-23" @default.
• W3037339235 modified "2023-10-18" @default.
• W3037339235 title "Computationally Designed Perrhenate Ion Imprinted Polymers for Selective Trapping of Rhenium Ions" @default.
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• W3037339235 doi "https://doi.org/10.1021/acsapm.0c00337" @default.
• W3037339235 hasPublicationYear "2020" @default.
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