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Neue tripodale Harnstoffrezeptoren binden Anionen bevorzugt gegenüber konkurrierenden, Wasserstoffbrücken bildenden Lösungsmitteln. 1H‐NMR‐Titrationen in 10 % [D6]DMSO/CDCl3 bescheinigen dem fluorierten Rezeptor eine höhere Affinität für Nitrat als für Halogenide, die der nichtfluorierte Rezeptor nicht zeigt. Der Grund für diese Selektivität ist vermutlich eine Anion‐π‐Wechselwirkung zwischen Nitrat...
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