Metal-containing ditopic receptors for molecular recognition of diammonium cations

Multifunctional membranes based on photosensitive crown-ether derivatives with advanced properties

“…The interesting examples of the ditopic receptors for α,ω-alkanediyldiammonium cations based on a tetraazamacrocyclic (cyclidene) nickel(II) complex bearing two crown-ether residues have been discussed by coworkers of the Tufts University, USA [37]. The studies of the host-guest interaction between the receptors and a series of α,ω-diammonium salts showed that 1:1 complexes are formed that is in agreement with our results.…”

“…The studies of the host-guest interaction between the receptors and a series of α,ω-diammonium salts showed that 1:1 complexes are formed that is in agreement with our results. In particular, receptor with benzo-15-crown-5 arms showed substantial selectivity in binding of trimethylene-and tetramethylenediammonium dications, and 1-2 orders of magnitude weaker binding of shorter (C 2 ) or longer (C 5 and C 6 ) diammonium cations [37].…”

Preparation and spectroscopic characterization of iron(II) and copper(II) complexes of a functionalized crown ether

“…Crown ethers can interact with many guests including inorganic ions and neutral organic molecules through weak non-covalent interactions [1][2][3][4][5][6]. The first series of crown ethers synthesized by Pedersen play an important role in the development of the supramolecular chemistry [5,[7][8][9].…”

Synthesis of the first mixed-donor spiro-linked macrocyclic tetralactams

“…7 Ligands capable of simultaneously being involved in two binding interactions are attracting current interest due to their applications in molecular recognition. 8 A number of such compounds has been observed to act as anti-HIV agents, which exhibited low cytotoxicity. 9 Bifunctional ligands In continuation of the above studies, we report here on the first synthesis of spiro-linked macrocycles tetraamides 1 and 2 which are expected to have ability to bind more than one metal ion.…”