Two novel water-soluble fluorescence probes T1 and T2 based on 5(6)-carboxyl rhodamine were designed and synthesized using a regioselective reaction. The probes exhibited highly selective and sensitive recognition toward Cu2+ over other metal ions in acetonitrile/Tris–HCl buffer solution (2:98, v/v; pH 7.4). Detection limits were 0.4 μM for T1 and 4.50 μM for T2 based on fluorescence titration analysis. Furthermore, probe T1 was successfully applied in cell imaging experiments to monitor Cu2+ in cells.
利用区域选择反应设计并合成了两种基于 5(6)- 羧基
罗丹明的新型
水溶性荧光探针 T1 和 T2。在
乙腈/三羟基
甲烷缓冲溶液(2:98, v/v; pH 7.4)中,这两种探针对 Cu2+ 的识别具有高度选择性和灵敏性,而对其他
金属离子的识别则不敏感。根据荧光滴定分析,T1 和 T2 的检测限分别为 0.4 μM 和 4.50 μM。此外,探针 T1 还成功地应用于细胞成像实验,以监测细胞中的 Cu2+。