Simple guanidinium motif for the selective binding and extraction of sulfate
Journal Article
·
· Separation Science and Technology
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Texas at Austin, Austin, TX (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
A simple bidentate anion receptor, shown previously to adopt a rigid pseudobicyclic conformation while binding anions in the solid state, selectively binds sulfate in aqueous solutions with log K1 and log K2 values of 3.78 ± 0.12 M-1 and 2.10 ± 0.23 M-1, respectively. This anion receptor has little to no affinity for nitrate and chloride in the same solutions. A lipophilic derivative was synthesized in four steps to yield an extractant that is capable of partitioning sulfate into 1,2 dichloroethane from water in the presence of large excesses of chloride. This extractant demonstrated D values as high as 2.5 with only 30 mM of anion receptor.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1408027
- Journal Information:
- Separation Science and Technology, Vol. 53, Issue 12; ISSN 0149-6395
- Publisher:
- Taylor & FrancisCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 8 works
Citation information provided by
Web of Science
Web of Science
Ion-pair induced supramolecular assembly formation for selective extraction and sensing of potassium sulfate
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