Viologen cyclophanes: redox controlled host–guest interactions. Issue 87 (10th September 2015)

• Record Type: Journal Article
• Authors: Berville, Mathilde; Karmazin, Lydia; Wytko, Jennifer A.; Weiss, Jean
• Is Part Of: Chemical communications. Volume 51:Issue 87(2015)
• Page Start: 15772
• Page End: 15775
• Publication Date: 2015-09-10
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c5cc06041a
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Bis(viologen) cyclophanes with alkyl linkers demonstrate redox-dependent host–guest properties, including the formation of a crystalline mixed valence species. Abstract : Viologens can exist in three redox states varying from dicationic to neutral. This work emphasizes the control of the host–guest properties in bis-viologen cyclophanes. Two flexible cyclophanes were prepared by a cyclisation method sensitive to the odd/even number of carbons in the flexible chains linking two viologens. C5 and C7 cyclophanes were characterised by X-ray diffraction in their tetracationic state and their diradical dicationic state. In the presence of tetrathiafulvalene or methyl viologen as guests, inclusion complexes were obtained, including a mixed valence species.