[Ru(phen)2(H2biim)](PF6)2配合物与阴离子的选择性作用

研究了Ru(phen)₂(H₂biim)](PF₆)₂(1)与各种阴离子之间的选择性作用, 发现配合物1与Cl^-, Br^-, I^-, NO₃^-, HSO₄^-和H₂PO₄^-阴离子之间存在氢键作用. OAc^-阴离子与配合物1作用, 由于强的氢键作用使H₂biim上的一个H转移到OAc^-上, 使配合物1脱去一个质子, 形成{Ru(phen)₂(H₂biim)](OAc)}结合体, 溶液颜色由黄色变为橙棕色. 由于F^-能形成非常稳定的HF₂^-, 配合物1逐步脱去2个质子, 溶液颜色由黄色变为紫色, 因此可作为裸眼检测阴离子的识别剂.

Selective Interaction Based on Complex [Ru(phen)2(H2biim)](PF6)2 and Anions

A new anion sensorRu(phen)2(H2biim)](PF6)2(1) has been developed, where the Ru/(Ⅱ)-phen moiety acts as a chromophore and H2biim ligand as an anion receptor via the formation of hydrogen bonds or deprotonation. A systematic investigation shows that complex 1 is an eligible sensor for various anions. It donates hydrogen bonds to the Cl-, Br-, I-, NO3-, HSO4- and H2PO4- anions, and further actualize mono proton transfer to OAc- anion via the formation of a robust, cyclic hydrogen bonding system and turns the color from yellow to orange brown. In the case of F-, stepwise deprotonation of the two N—H fragments occurs due to the formation of a highly stable HF2- anion, resulting in color change from yellow to purple, which can be distinguished by naked-eye.