Abstract
Silica gel-bound crown ethers and aza macrocycles have been synthesized with the attaching arm connected to the carbon framework of the macrocycles. The interactions of these bound macrocycles with cations are almost identical to those involving the analogous free macrocycles. This has allowed for predictable cation separation, concentration, and removal processes to be performed on a small scale. Quantum mechanical calculations and NMR measurements indicate that similarly bound chiral macrocycles will be capable of use in separating chiral organic amines.
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Dedicated to the memory of Professor James J. Christensen who died on 5 September 1987.
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Bradshaw, J.S., Izatt, R.M., Christensen, J.J. et al. Stable silica gel-bound crown ethers. Selective separation of metal ions and a potential for separations of amine enantiomers. J Incl Phenom Macrocycl Chem 7, 127–136 (1989). https://doi.org/10.1007/BF01060715
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DOI: https://doi.org/10.1007/BF01060715