ABSTRACT

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.

中文翻译：

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使用基于蒽的二脒识别二羧酸和二膦酸：在质子溶剂中形成脒-羧酸盐和脒-膦酸盐桥

摘要

基于蒽基二脒 ( 1 ) 和二羧酸的结合实验，观察到稳定的“脒-羧酸盐”盐桥的形成，即使在竞争性质子溶剂 (MeOH) 中也是如此。通过 DOSY NMR、ESI-Mass、滴定实验和单晶 X 射线分析证实了二脒1和二羧酸的 1:1 结合复合物的形成。类似地，二脒1和二膦酸的络合也证明了 MeOH 溶液中“脒-膦酸盐”盐桥的形成。