Department of Chemistry and TKL of Metal- and Molecule-Based Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China.
Department of Chemistry and TKL of Metal- and Molecule-Based Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China.
Talanta. 2015 Jan;131:597-602. doi: 10.1016/j.talanta.2014.08.017. Epub 2014 Aug 19.
A novel artificial receptor 1 containing the indolocarbazole-NH moieties as the recognition sites exhibited high selectivity and sensitivity toward F(-) over other typical anionic species in DMSO solution. Upon addition of F(-) into the solution, receptor 1 showed a remarkable ratiometric shift of the fluorescence maximum from 535 to 590 nm, and also a prominent color change from light yellow to orange, which was observable by the naked eye. The recognition properties of receptor 1 were investigated by (1)H NMR, UV-vis, and fluorescence titration experiments, with the results suggesting a two-step strategy of binding with F(-). In addition, the theoretical calculations were carried out to reveal the role of intramolecular charge transfer in the ratiometric fluorescence recognition process.
一种新型的人工受体 1，其识别位点含有吲哚咔唑-NH 部分，在 DMSO 溶液中对 F(-)表现出高于其他典型阴离子物种的高选择性和灵敏度。向溶液中加入 F(-)后，受体 1 的荧光最大波长从 535nm 显著红移至 590nm，并且颜色也从浅黄色变为橙色，肉眼可观察到明显的变化。通过 (1)H NMR、UV-vis 和荧光滴定实验研究了受体 1 的识别特性，结果表明与 F(-)的结合采用了两步策略。此外，还进行了理论计算，以揭示分子内电荷转移在比率荧光识别过程中的作用。
