[Ru(phen)_2(H_2biim)](PF_6)_2配合物与阴离子的选择性作用

Selective Interaction Based on Complex [Ru(phen)_2(H_2biim)](PF_6)_2 and Anions

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.

A new anion sensor[Ru（ 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-,NO 3-,HSO 4-and H2PO 4-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 HF 2-anion,resulting in color change from yellow to purple,which can be distinguished by naked-eye.