A benzocrown-6-calix[4]arene methacrylate copolymer: Selective extraction of caesium ions from a multi-component system

Brett M. Rambo; Sung Kuk Kim; Jong Seung Kim; Christopher W. Bielawski; Jonathan L. Sessler

doi:10.1039/c0sc00396d

A benzocrown-6-calix[4]arene methacrylate copolymer: Selective extraction of caesium ions from a multi-component system

Brett M. Rambo, Sung Kuk Kim, Jong Seung Kim, Christopher W. Bielawski, Jonathan L. Sessler

Research output: Contribution to journal › Article

27 Citations (Scopus)

Abstract

The synthesis and extraction properties of a copolymer comprised of a 10:1 molar ratio of methyl methacrylate (MMA) and a methacrylate functionalized benzocrown-6-calix[4]arene are reported. Under aqueous-dichloromethane liquid-liquid extraction conditions, the copolymer displayed an enhanced selectivity for caesium over sodium and potassium (in the form of their picrate salts) as compared to an appropriate small molecule analogue. Further, the copolymer was capable of removing caesium nitrate from aqueous solution in the presence of various other anionic (e.g., F^-, Cl^-, and SO₄^-) and cationic species (e.g., K⁺ and Na⁺). The ability of this polymeric system to extract inorganic caesium salts into dichloromethane from aqueous media scaled with the relative hydration energies (Δ_hydG°) of each anion studied (i.e., NO₃^- > Br^- ≫ Cl^- or F ^-).

Original language	English
Pages (from-to)	716-722
Number of pages	7
Journal	Chemical Science
Volume	1
Issue number	6
DOIs	https://doi.org/10.1039/c0sc00396d
Publication status	Published - 2010 Dec 1

ASJC Scopus subject areas

Chemistry(all)

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Rambo, B. M., Kim, S. K., Kim, J. S., Bielawski, C. W., & Sessler, J. L. (2010). A benzocrown-6-calix[4]arene methacrylate copolymer: Selective extraction of caesium ions from a multi-component system. Chemical Science, 1(6), 716-722. https://doi.org/10.1039/c0sc00396d

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abstract = "The synthesis and extraction properties of a copolymer comprised of a 10:1 molar ratio of methyl methacrylate (MMA) and a methacrylate functionalized benzocrown-6-calix[4]arene are reported. Under aqueous-dichloromethane liquid-liquid extraction conditions, the copolymer displayed an enhanced selectivity for caesium over sodium and potassium (in the form of their picrate salts) as compared to an appropriate small molecule analogue. Further, the copolymer was capable of removing caesium nitrate from aqueous solution in the presence of various other anionic (e.g., F-, Cl-, and SO4-) and cationic species (e.g., K+ and Na+). The ability of this polymeric system to extract inorganic caesium salts into dichloromethane from aqueous media scaled with the relative hydration energies (ΔhydG°) of each anion studied (i.e., NO3- > Br- ≫ Cl- or F -).",

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AB - The synthesis and extraction properties of a copolymer comprised of a 10:1 molar ratio of methyl methacrylate (MMA) and a methacrylate functionalized benzocrown-6-calix[4]arene are reported. Under aqueous-dichloromethane liquid-liquid extraction conditions, the copolymer displayed an enhanced selectivity for caesium over sodium and potassium (in the form of their picrate salts) as compared to an appropriate small molecule analogue. Further, the copolymer was capable of removing caesium nitrate from aqueous solution in the presence of various other anionic (e.g., F-, Cl-, and SO4-) and cationic species (e.g., K+ and Na+). The ability of this polymeric system to extract inorganic caesium salts into dichloromethane from aqueous media scaled with the relative hydration energies (ΔhydG°) of each anion studied (i.e., NO3- > Br- ≫ Cl- or F -).

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