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Enhancement of Anion Recognition Exhibited by a Halogen-Bonding Rotaxane Host System

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posted on 2010-09-01, 00:00 authored by Nathan L. Kilah, Matthew D. Wise, Christopher J. Serpell, Amber L. Thompson, Nicholas G. White, Kirsten E. Christensen, Paul D. Beer
We report the first use of solution-phase halogen bonding to control and facilitate the assembly of an interlocked structure through the bromide anion-templated formation of a rotaxane based upon an iodotriazolium axle. The incorporation of a halogen atom into the rotaxane host cavity dramatically improves the anion-recognition capabilities of the interlocked receptor, giving unusual iodide selectivity in a competitive aqueous medium.

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