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Novel intramolecular charge transfer effect‐based ligands and aggregation‐induced emission‐active europium complexes: synthesis, characterization, and fluorescence properties
Luminescence ( IF 3.2 ) Pub Date : 2020-07-28 , DOI: 10.1002/bio.3925 Shuaishuai Yang 1 , Zuping Guo 1 , Zhongqian Hu 1 , Dongcai Guo 1
Luminescence ( IF 3.2 ) Pub Date : 2020-07-28 , DOI: 10.1002/bio.3925 Shuaishuai Yang 1 , Zuping Guo 1 , Zhongqian Hu 1 , Dongcai Guo 1
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Two novel coumarin derivatives and the corresponding europium complexes were prepared using a simple procedure. The pH response of the ligand and the aggregation‐induced emission (AIE) properties of the target europium complex were studied. The ligand had an intramolecular charge transfer (ICT) effect and was linearly and sharply responsive under acidic conditions. The goal europium complexes exhibited excellent AIE performance when subjected to increasing concentrations of target europium complex or proportion of poor solvent. The effect of substituents on fluorescence strength or thermogravimetric and electrochemical properties was further investigated. The target complexes displayed the typical fluorescence of europium. The fluorescence amplitude of the target europium complexes was enhanced by the addition of electron‐donating groups to ligands. Thermogravimetric research findings indicated that the target complexes possessed extreme thermal stability. Electrochemistry discovery findings indicated that the highest occupied molecular orbit energy level of EuL1 was greater than EuL2, but the lowest unoccupied molecular orbit energy level was smaller than that of EuL2. These complexes could be applied in medicinal chemistry, substance chemistry, and fluorescence labelling areas.
中文翻译：
基于分子内电荷转移效应的新型配体和聚集诱导的发射活性euro络合物：合成，表征和荧光性质
用一种简单的方法制备了两种新颖的香豆素衍生物和相应的euro配合物。研究了目标euro络合物的配体pH响应和聚集诱导发射（AIE）特性。该配体具有分子内电荷转移（ICT）的作用，并且在酸性条件下具有线性和尖锐的响应性。当目标increasing络合物的浓度不断增加或不良溶剂的比例不断增加时，目标complex络合物表现出出色的AIE性能。进一步研究了取代基对荧光强度或热重和电化学性质的影响。目标复合物显示出the的典型荧光。通过向配体中添加供电子基团，可以提高目标euro络合物的荧光幅度。热重研究结果表明目标复合物具有极高的热稳定性。电化学发现表明，最高占据分子轨道的能级为EuL 1大于EuL 2，但最低的未占据分子轨道能级小于EuL 2。这些配合物可用于药物化学，物质化学和荧光标记领域。
更新日期：2020-07-28
中文翻译：
基于分子内电荷转移效应的新型配体和聚集诱导的发射活性euro络合物：合成，表征和荧光性质
用一种简单的方法制备了两种新颖的香豆素衍生物和相应的euro配合物。研究了目标euro络合物的配体pH响应和聚集诱导发射（AIE）特性。该配体具有分子内电荷转移（ICT）的作用，并且在酸性条件下具有线性和尖锐的响应性。当目标increasing络合物的浓度不断增加或不良溶剂的比例不断增加时，目标complex络合物表现出出色的AIE性能。进一步研究了取代基对荧光强度或热重和电化学性质的影响。目标复合物显示出the的典型荧光。通过向配体中添加供电子基团，可以提高目标euro络合物的荧光幅度。热重研究结果表明目标复合物具有极高的热稳定性。电化学发现表明，最高占据分子轨道的能级为EuL 1大于EuL 2，但最低的未占据分子轨道能级小于EuL 2。这些配合物可用于药物化学，物质化学和荧光标记领域。
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