Multiple Hydrogen-Bond-Mediated Molecular Duplexes Based on the Self-Complementary Amidourea Motif

[摘要]：The self-complementary amidourea motif, which was stabilized by four intermolecular tricenter hydrogen bonds, was investigated in solution and in the solid state. Extensive studies on oligomer 2 indicated that the hydrogen-bonding mode could persist in longer molecular duplexes based on the amidourea motif. The dimerization constants of 2b.2b in various DMSO-d(6)/CDCl3 mixtures were determined quantitatively by H-1 NMR dilution studies, which suggested that the homoduplex was highly stable in low polar solvents.

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