Ferrocene substituted N,N′-bis(3-aminopropyl)oxamide: A new electrochemical sensor for copper(II) and fluoride ions in the biological pH range

Synthesis of Indeno[2′,1′:5,6]pyrido[2,3‐d]pyrimidine Derivatives and Their Recognition Properties as New Type Anion Receptors

“…Color changes are most probably due to the formation of hydrogen bonds between the aminopymidine dione NH groups of receptor 4a and F − . The formation of such hydrogen bonds affects the electronic properties of the chromophore, resulting in a color change with a subsequent new charge‐transfer interaction between the fluoride‐bound amide moiety and the electron‐deficient NH group .…”

Novel N,N′‐Diacylhydrazine‐Based Colorimetric Receptors for Selective Sensing of Fluoride and Acetate Anions

“…of F -. The proton signal of NH (δ 10.89) was shifted toward upfield and finally disappeared, and the proton signal of NH (δ 10.62) became broader and was shifted toward upfield, while those corresponding to the aromatic protons in the tether were only slightly shifted toward upfield, 14 as shown in Figure 4.…”

Synthesis and electrochemical sensing behaviour of a new ferrocene functionalized tet ‘a’ macrocyclic receptor towards transition metal ions

“…Tetra(n-butyl) ammonium perchlorate was used as the supporting electrolyte. The pH of the solutions was adjusted with millimolar solutions of HClO 4 and KOH and monitored using a pH meter. The electrochemical response was recorded after progressively adding aliquots of stock solutions in suitable solvent mixture dioxane : water (7 : 3 v/v) containing sub-stoichiometric or stoichiometric equivalents of metal ions.…”