engleski

Anion-templated assembly of biphenyl-bis-urea receptor

Anionic species play an important role in many different aspects of modern society, in biology, medicine, and in the environment. Among hydrogen bonding receptors, urea derivatives play a prominent role, and therefore we designed bis-urea derivative featuring a biphenyl spacer, 1, 1'-(4, 4'-biphenylene)bis(3-phenylurea) (1). In this work we present anion binding properties of five receptor–anion complexes obtained using tetrabutylammonium salts, TBAX (X = AcO-, H2PO4-, Br-, I- and NO3-) [1]. X-ray structures of receptor–anion complexes well demonstrate the nature of urea–anion interactions and reveal some interesting and unexpected solid-state architectures (Fig. 1).

bis-urea receptor ; anion binding ; receptor-anion complex ; X-ray structure

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