A Water‐Soluble Perylene Bisimide Cyclophane as a Molecular Probe for the Recognition of Aromatic Alkaloids. (31st January 2019)

• Record Type: Journal Article
• Authors: Sapotta, Meike; Hofmann, Anja; Bialas, David; Würthner, Frank
• Is Part Of: Angewandte Chemie. Volume 131:Number 11(2019)
• Page Start: 3554
• Page End: 3558
• Publication Date: 2019-01-31
• Subjects: Alkaloide -- Cyclophane -- Fluoreszenzsonden -- Perylenbisimide -- Wirt-Gast-Systeme; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201813559
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Herein, we report a water‐soluble macrocyclic host based on perylene bisimide (PBI) chromophores that recognizes natural aromatic alkaloids in aqueous media by intercalating them into its hydrophobic cavity. The host–guest binding properties of our newly designed receptor with several alkaloids were studied by UV/Vis and fluorescence titration experiments as the optical properties of the chromophoric host change significantly upon complexation of guests. Structural information on the host–guest complexes was obtained by 1D and 2D NMR spectroscopy and molecular modelling. Our studies reveal a structure–binding property relationship for a series of structurally diverse aromatic alkaloids with the new receptor and higher binding affinity for the class of harmala alkaloids. To our knowledge, this is the first example of a chromophoric macrocyclic host employed as a molecular probe for the recognition of aromatic alkaloids. Abstract : Sei mein Gast : Ein wasserlöslicher Perylenbisimidcyclophan‐Wirt erkennt strukturell unterschiedliche, natürliche aromatische Alkaloide, indem er sie in seiner hydrophoben Kavität bindet. Die Einlagerung des Gastes wird durch spezifische Veränderungen der optischen Eigenschaften des Wirtes angezeigt.