A new guest-responsive color-change host, 1, in which three benzocrown ethers modified with bipyridinium are connected through the mesitylene unit, was synthesized to investigate its ion-recognition ability. 1 exhibited a yellow color associated with an intramolecular charge-transfer (ICT) absorption, which faded upon the addition of alkali and alkaline earth metal ions. Ba2+ was detected by 1 with high sensitivity.
为了研究其离子识别能力,我们合成了一种新的客体响应变色宿主 1,其中三个用联
吡啶修饰的苯并
冠醚通过
间二甲苯单元连接在一起。1 显示出与分子内电荷转移(ICT)吸收相关的黄色,在加入碱
金属和碱土
金属离子后,黄色会褪去。1 对 Ba2+ 的检测灵敏度很高。