Halogen- and hydrogen-bonding triazole-functionalised porphyrin-based receptors for anion recognitionElectronic supplementary information (ESI) available: 1H and 13C NMR spectra and ESI mass spectra or porphyrins 5 and 6; titration protocols and UV/visible titration curves. CCDC 953393. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c3dt52093e

Iodotriazole and triazole anion recognition groups have been integrated into a picket-fence zinc( ii )-metalloporphyrin scaffold to produce receptors for anion recognition and sensing applications. 1 H NMR and UV/visible spectroscopic investigations reveal both host systems exhibit strong anion binding affinities in a range of solvent media. Importantly, the halogen-bonding iodotriazole-containing porphyrin-based host displays halide binding affinities substantially larger than the protic-functionalised analogue concomitant with a reduced strength of oxoanion complexation. Halogen-bonding iodotriazole anion recognition groups have been integrated into a picket-fence zinc( ii )-metalloporphyrin scaffold to produce a receptor with enhanced halide anion recognition and sensing applications.