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RESEARCH PRODUCT
Anion Recognition by a Bioactive Diureidodecalin Anionophore: Solid-State, Solution, and Computational Studies
Rakesh PuttreddyAnthony P. DavisMartin NovákHennie ValkenierHennie ValkenierRadek MarekRadek MarekKari RissanenOndřej JurčekOndřej JurčekOndřej JurčekHazel A. Sparkessubject
Anionsinorganic chemicalsMagnetic Resonance SpectroscopyAnion ReceptorsMolecular Conformationreceptorsanion recognitionCrystal structureCrystallography X-Ray010402 general chemistry01 natural sciencesChlorideCatalysisNitrophenolsComputers MolecularPhysico-chimie généraleChloridesChimie des colloïdesTheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITYmedicineUreaChimieMoleculehost–guest interactionsBinding siteta116Binding SitesFull Paper010405 organic chemistryChemistryHydrogen bondOrganic ChemistryChimie des surfaces et des interfacesGeneral ChemistryFull PapersAffinities0104 chemical sciences3. Good healthChimie organiqueCrystallographyhydrogen bondssolid-state structuresProton NMRSelectivityanionsmedicine.drugdescription
Recent work has identified a bis-(p-nitrophenyl)ureidodecalin anion carrier as a promising candidate for biomedical applications, showing good activity for chloride transport in cells yet almost no cytotoxicity. To underpin further development of this and related compounds, a detailed structural and binding investigation is reported. Crystal structures of the transporter as five solvates confirm the diaxial positioning of urea groups while revealing a degree of conformational flexibility. Structures of complexes with Cl−, Br−, NO3 −, SO4 2− and AcO−, supported by computational studies, show how the binding site can adapt to accommodate these anions. 1H NMR binding studies revealed exceptionally high affinities for anions in DMSO, decreasing in the order SO4 2−>H2PO4 −≈HCO3 −≈AcO−≫HSO4 −>Cl−>Br−>NO3 −>I−. Analysis of the binding results suggests that selectivity is determined mainly by the H-bond acceptor strength of different anions, but is also modulated by receptor geometry.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-02-01 | Chemistry - A European Journal |