Synthesis, Structure and Anion Sensing Properties of a Dicationic Bis(imidazolium)‐Based Cyclophane. Issue 13 (10th April 2018)

• Record Type: Journal Article
• Authors: Sabater, Paula; Zapata, Fabiola; Caballero, Antonio; Alkorta, Ibon; Ramirez de Arellano, Carmen; Elguero, Jose; Molina, Pedro
• Is Part Of: ChemistrySelect. Volume 3:Issue 13(2018)
• Page Start: 3855
• Page End: 3859
• Publication Date: 2018-04-10
• Subjects: Anions -- Cyclophane -- Hydrogen bonds -- Imidazolium -- Sensor; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201800809
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: The preparation and sensing properties of a tetracyclic cyclophane receptor containing two imidazolium rings as anion binding sites and two fluorene rings as fluorescent signaling units, are reported. The receptor behaves as a selective fluorescent chemosensor molecule for inorganic phosphates. 1 H‐NMR spectroscopical data clearly indicate the simultaneous occurrence of charge‐assisted aromatic and aliphatic C−H noncovalent interactions. PCM/DFT calculations have been carried out to predict the structures of the complexes formed with one and two molecules of PF6 −, H2 PO4 − and HP2 O7 3− Abstract : We describe here the synthesis and anion sensing capabilities of a new cyclophane receptor based on imidazolium and fluorene motifs which selectively recognize H2 PO4 − and HP2 O7 3− anions.