| 1. | The first simple enzyme mimics were based on crown ether and cryptand.
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| 2. | In the research lab, crown ethers are used for this purpose.
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| 3. | Lariat crown ethers have sidearms that can augment complexation of cation.
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| 4. | Crown ethers, like 15-crown-5, may be used as a phase-transfer catalyst.
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| 5. | A chiral substituted crown ether catalyst developed by Jean-Marie Lehn for ester cleavage.
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| 6. | Like crown ethers, cyclen compounds are capable of selectively binding cations.
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| 7. | Since the salt is poorly soluble in nonpolar solvents, crown ethers are typically used.
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| 8. | A notable example of catalysts that employ this mechanism is Jean-Marie Lehn's crown ether.
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| 9. | Excess acid locks the crown ether by protonation and again the complex is dethreaded.
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| 10. | The bis-macrocycle ( red ) contains two phenanthroline units in a crown ether chain.
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