Strong and selective halide anion binding by neutral halogen bonding [2]rotaxanes in wet organic solvents.
The design and construction of neutral interlocked host molecules for anion recognition are rare. Using an active-metal template approach, the preparation of a family of neutral halogen bonding rotaxanes containing two, three and four iodotriazole groups integrated into the macrocycle and axle compo...
| Hoofdauteurs: | , , |
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| Formaat: | Journal article |
| Taal: | English |
| Gepubliceerd in: |
Wiley
2017
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| Samenvatting: | The design and construction of neutral interlocked host molecules for anion recognition are rare. Using an active-metal template approach, the preparation of a family of neutral halogen bonding rotaxanes containing two, three and four iodotriazole groups integrated into the macrocycle and axle components is achieved. In spite of the interlocked hosts’ neutrality, such rotaxane systems are capable of binding halide anions strongly and selectively in wet organic solvent mixtures. Importantly, halide binding strength and selectivity can be modulated by varying the number and position of the halogen bond-donor iodotriazole groups within the interlocked cavity; the rotaxane containing the largest number of halogen bond donor groups exhibits the highest halide anion binding affinities. Through solvent medium percentage water content variation, neutral XB donor-mediated anion binding strength is also demonstrated to be highly sensitive to solvent polarity. |
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