A Halogen-Bonding Bis-Triazolium Rotaxane for Halide-Selective Anion Recognition.

Journal article

A systematic study on the anion-binding properties of acyclic halogen- and hydrogen-bonding bis-triazolium carbazole receptors is described. The halide-binding potency of halogen-bonding bis-iodotriazolium carbazole receptors was found to be far superior to their hydrogen-bonding bis-triazolium-based analogues. This led to the synthesis of a mixed halogen- and hydrogen-bonding rotaxane host containing a bis-iodotriazolium carbazole axle component. The rotaxane's anion recognition properties, determined by (1) H NMR titration experiments in a competitive aqueous solvent mixture, demonstrated the preorganised halogen-bonding interlocked host cavity to be halide-selective, with a strong binding affinity for bromide.

Authors: Mullaney, B; Partridge, B; Beer, P

• Journal: Chemistry (Weinheim an der Bergstrasse, Germany)
• Publication date: 2014-11-01
• DOI: 10.1002/chem.201405578
• EISSN: 1521-3765
• ISSN: 0947-6539
• Language: English
• Keywords: carbazoles; supramolecular chemistry; host-guest systems; anion binding; halogen bonding