Calix[4]pyrrole-capped metalloporphyrins as ditopic receptor models for anions.
Strapped calix[4]pyrrole-metalloporphyrin conjugates, potential hosts for anionic guests, have been synthesized and characterized. The condensation unexpectedly resulted in the formation of the two conformational isomers of calix[4]pyrrole-capped porphyrins 6 and 7. The anion binding studies revealed that only isomer 6 showed strong binding with fluoride anion in organic solvent, and neither isomer showed any appreciable binding with Cl-, Br-, and I-. [structure: see text]
Panda
Pradeepta K
PK
Department of Chemistry, Kangwon National University, Chun-Chon 200-701, Korea.
Lee
Chang-Hee
CH
D000838:Anions / Q000737:chemistry*; D047250:Calixarenes; D009682:Magnetic Resonance Spectroscopy; D008665:Metalloporphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry; D011166:Porphyrins / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D013237:Stereoisomerism
D000838:Anions; D008665:Metalloporphyrins; D011166:Porphyrins; D011758:Pyrroles; C469811:calix(4)pyrrole; D047250:Calixarenes; D009532:Nickel