A potent luminescent sensor for the detection of iodide ions was developed based on a terbium(III)-based lanthanide–organic framework [Tb(cpia)(H₂O)₂]_n·nH₂O (1), which was prepared under hydrothermal conditions using the 5-(4-carboxyphenoxy)isophthalic acid (H₃cpia) bridging ligand. Compound 1 exhibits superior luminescence quenching behavior towards I⁻ with high sensitivity and selectivity among various anions and shows real-time response. Moreover, the mechanism of the selective luminescence quenching response for I⁻ can be mainly explained by the absorption competition between 1 and I⁻. According to this quenching mechanism, we find that compound 1 can also detect Br⁻ by adjusting the excitation wavelength. Significantly, this work could serve as a general guidance for the design and synthesis of pollutant sensors.

中文翻译：

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III（III）镧系元素-有机框架，作为水性介质中的选择性和敏感碘/溴化物传感器

基于on（III）基镧系元素-有机骨架[Tb（cpia）（H ₂ O）₂ ] _n · n H ₂ O（1），开发了一种用于检测碘离子的有效发光传感器。在水热条件下，使用5-（4-羧苯氧基）间苯二甲酸（H ₃ cpia）桥联配体。化合物1表现出优良的发光猝灭行为向我^-用各种阴离子和节目的实时响应中的高灵敏度和选择性。此外，我的选择性发光猝灭反应的机制^-可以通过之间的吸收竞争将主要说明1，我^- 。根据这种猝灭机制，我们发现，化合物1也可以检测溴^-通过调整激发波长。重要的是，这项工作可以作为污染物传感器设计和合成的一般指导。