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Example:10.1021/acsami.1c06204 or Chem. Rev., 2007, 107, 2411-2502
Recognition of dicarboxylic acids and diphosphonic acids using anthracene-based diamidine: formation of amidinium-carboxylate and amidinium-phosphonate salt bridges in a protic solvent
Supramolecular Chemistry  (IF1.688),  Pub Date : 2021-04-14, DOI: 10.1080/10610278.2021.1908545
Takahiro Kusukawa, Keita Nakaguchi, Saya Nishimura, Akane Nakajima


The formation of a stable ‘amidinium-carboxylate’ salt bridge, even in a competing protic solvent (MeOH), was observed based on the binding experiments of anthracene-based diamidine (1) and dicarboxylic acids. The formation of 1:1 binding complexes of the diamidine 1 and dicarboxylic acids was confirmed by DOSY NMR, ESI-Mass, titration experiments and a single crystal X-ray analysis. Similarly, the formation of the ‘amidinium-phosphonate’ salt bridge in the MeOH solution was also evidenced by the complexation of the diamidine 1 and diphosphonic acids.