title: Sulfonamide carbazole receptors for anion recognition.
abstract: Carbazole-based receptors functionalized with two sulfonamide groups have been synthesized and their properties as anion receptors have been evaluated. The receptor with bis(trifluoromethyl)aniline groups has shown a very high affinity for halide ions, especially remarkable as only two hydrogen bonds are formed in the complexes. (1)H NMR and fluorescence titrations have been carried out and binding constants up to 7.9 × 10(6) M(-1) have been reached. X-ray structures have been obtained and a modelling study has shown the possible reasons for the large affinity of these compounds for halide anions.
authors: Departamento de Química Orgánica, Universidad de Salamanca, Plaza de los Caídos 1-5, E-37008, Salamanca, Spain.
authors: Ángel  L
authors: Á
authors: Fuentes de Arriba
authors: María G
authors: MG
authors: Turiel
authors: Luis
authors: L
authors: Simón
authors: Francisca
authors: F
authors: Sanz
authors: Juan F
authors: JF
authors: Boyero
authors: Francisco M
authors: FM
authors: Muñiz
authors: Joaquín R
authors: JR
authors: Morán
authors: Victoria
authors: V
authors: Alcázar
mesh_terms: D000838:Anions / Q000138:chemical synthesis / Q000737:chemistry; D002227:Carbazoles / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005453:Fluorescence; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D013237:Stereoisomerism; D013449:Sulfonamides / Q000737:chemistry*
chemical_list: D000838:Anions; D002227:Carbazoles; D013449:Sulfonamides; C041514:carbazole