Cryptand-like anion receptors
WebSep 6, 2010 · About the same time the term cryptand appeared in reference to another bicyclic compound that was selective for alkaline-earth ions. Since the first report these … WebSep 22, 2014 · A simple anion receptor incorporating bisamide and bispyrrole groups as recognition sites was synthesised, and its binding properties towards anions were studied by UV–vis, 1H NMR, ESI-MS spectra and theoretical calculations. This receptor exhibited a selective complexation with biologically important and F− over other anions tested in dry …
Cryptand-like anion receptors
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WebFirst, the cationic azaphosphatranes together with the metal ions provide an overall +12 charge, offering a strong electrostatic driving force for anion binding. Second, the … WebThe novel cryptand in/out-3, containing two tripyrrolemethane units bridged by three 1,3- diisopropylidenbenzene arms, was readily synthesized by a convergent three-step …
WebPerchlorate anion is a highly toxic environmental contaminant, which is implicated in various health related problems. This paper reports a cryptand-based synthetic molecule (L) prepared from the reaction of tris (2-aminoethyl) amine and 2,5-thiophenedicarboxaldehyde under a high dilution condition, providing a well-defined cavity for a guest species.
WebMay 2, 2024 · Considered in concert, these molecular constructs have allowed advances in applied supramolecular chemistry; to date, they have been exploited for selective guest encapsulation studies, anion... WebAug 20, 2024 · Cryptand 1 was obtained by an acetylenic coupling reaction and, despite our expectation to have a shape-persistent compound with a large internal cavity, the single crystal X-ray diffraction molecular structure of cryptand 1 showed the completely collapsed cavity behavior of the cryptand [ 17 ].
WebThe impact of the solvent environment on the stabilization of the complexes formed by fluorine (T-F) and cyanide (T-CN) substituted tweezers with halide anions has been investigated theoretically. The study was carried out using computational methodologies based on density functional theory (DFT) and symmetry adapted perturbation theory …
WebMay 24, 2024 · Cryptand-like anion receptors journal, January 2010. Kang, Sung Ok; Llinares, José M.; Day, Victor W. Chemical Society Reviews, Vol. 39, Issue 10 ... with NH-anion interactions being more important than CH-anion interactions. In the solid state, the receptor binds the pyrophosphate anion in a clip-like slot via NH and CH hydrogen … smallpox found in labWebAn anion receptor derived from a tren-based amide cryptand with pyridine spacers has been synthesized and characterized. Two crystal structures are reported: the hydrochloride salt and the fluoride complex. The cryptand shows extremely high binding with fluoride ion in DMSO-d6. Both the crystal structure and solution 19F NMR data indicate an ... hilarys handWebOct 1, 2001 · Bis-tren cryptands can be conveniently used for making anion receptors operating through the metal–ligand interaction. In fact, each tren subunit can coordinate, according to a trigonal bipyramidal mode, a Cu (II) centre, which leaves one axial position available for anion binding. smallpox found in pennsylvania labWebCryptand-like anion receptors Author: Sung Ok Kang, José M. Llinares, Victor W. Day, Kristin Bowman-James Source: Chemical Society reviews 2010 v.39 no.10 pp. 3980 … smallpox frenchWebDec 20, 2024 · The concept of anion receptor can date back to the late 1960s,1and has become one revolutionary branch of supramolecular chemistry, with rich applications ranging from chemistry, biology to industry separations during the past decade.2Of particular importance and interests are the development of novel adsorbents which can selectively … smallpox found in philadelphiaWebAnion-Trap Additives The design and synthesis of receptor molecules for the selective complexation of ions has been an active area for more than two decades. In the past, … smallpox found in storageWebCryptands utilize inside CH or NH groups as hydrogen bond (H-bond) donors to capture anions such as halides. In this work, the nature and selectivity of confined hydrogen … smallpox found in pa lab