Fluorescent dihydroxypyridine ligands were prepared by attaching pyrene-, dansyl-, and methoxycoumarin-fluorophores viadimethyleneamine linkers. The reaction of these ligands with [(p-cymene)RuCl2]2 or [(C6H5CH2NMe2H)RuCl2]2Cl2 resulted in the formation of 12-metallacrown-3 complexes, which possess strong affinity for lithium ions. By a judicious choice of the fluorophore and the arene π-ligand, a macrocycle was obtained that could be used in aqueous solution to selectively and quantitatively detect lithium ions by fluorescence spectroscopy.
氟荧光二
羟基吡啶配体是通过将
芘、丹
萘和美克咔啉荧光团通过二亚
甲胺连接体连接而制备的。这些
配体与[(p-
辛烯)RuCl2]2或[(C6H5CH2NMe2H)RuCl2]2Cl2的反应导致形成12-
金属冠-3复合物,这些复合物对
锂离子具有很强的亲和力。通过精心选择荧光团和芳香环π-
配体,得到了可以在
水溶液中使用的宏环,能够通过荧光光谱选择性和定量地检测
锂离子。