Sensing of alkali metal ions has attracted considerable interest owing to the significance of these metal ions in biology. Of the many mechanisms used for ion signaling, photoinduced electron transfer (PET) is the one most commonly exploited. We report the use of simple PET sensors as a ratiometric sensor towards alkali metal ions. The systems described here behave either as a simple PET sensor or as a ratiometric sensor towards alkali metal ions based on the length of the spacer that connects the donor and acceptor groups. The formation of an exciplex between the donor and acceptor groups in the metal ion free state and the changes of the monomer and the exciplex emissions on metal ion binding are utilized for the ratiometric signaling of alkali metal ions.
由于碱
金属离子在
生物学中的重要性,碱
金属离子的传感引起了人们极大的兴趣。在用于离子信号传导的多种机制中,光诱导电子转移(PET)是最常用的一种。我们报告了使用简单的 PET 传感器作为碱
金属离子的比率传感器。这里描述的系统既可以作为简单的 PET 传感器,也可以作为基于连接供体和受体基团的间隔基长度的碱
金属离子比率传感器。利用
金属离子游离状态下的供体和受体基团之间激基复合物的形成以及单体的变化和
金属离子结合上的激基复合物发射来用于碱
金属离子的比率信号传导。