The CuAAC ‘click’ reaction was used to couple alkyne-functionalized lanthanide-DOTA complexes to a range of fluorescent antennae. Screening of the antenna components was aided by comparison of the luminescent output of the resultant sensors using data normalized to account for reaction conversion as assessed by IR. A maximum 82-fold enhanced signal:background luminescence output was achieved using a Eu(III)-DOTA complex coupled to a coumarin-azide, in a reaction which is specific to the presence of copper(I). This optimized complex provides a new lead design for lanthanide-DOTA complexes which can act as irreversible ‘turn-on’ catalytic sensors for the detection of ligand-bound copper(I).
使用CuAAC “click”反应将烷基官能化的镧系-DOTA配合物与一系列荧光天线耦合。通过将数据归一化以考虑红外评估的反应转化来比较结果传感器的发光输出,辅助筛选天线组件。通过将Eu(III)-DOTA复合物与香豆素-叠氮耦合,在特定于铜(I)存在的反应中实现了最大82倍增强的信号:背景发光输出。这种优化的复合物为镧系-DOTA配合物提供了一种新的引导设计,可以作为不可逆的“开启”催化传感器,用于检测与配体结合的铜(I)。