荧光
分子内力
激发态
发光
斯托克斯位移
化学
光化学
电子转移
配体(生物化学)
分析化学(期刊)
质子
皮兰
材料科学
立体化学
原子物理学
受体
光电子学
物理
量子力学
生物化学
色谱法
作者
Tiantian Liu,Qiushuo Huang,Mengna Tian,Zhangfei Lin,Wenpeng Wu,Tiegang Ren,Jinglai Zhang
标识
DOI:10.1016/j.jphotochem.2022.113991
摘要
• A new near-infrared fluorescent probe was designed and synthesized. • The fluorescent probe could detect Al 3+ , Cr 3+ , Fe 3+ and Cu 2+ with high selectivity and sensitivity. • Quantum chemical calculations were employed to explain the sensing mechanism. A novel near-infrared (NIR) fluorescence sensor DCM-PSI based on dicyanomethylene-4H-pyran( DCM ) was designed and synthesized to selectively detect Al 3+ , Cr 3+ , Fe 3+ and Cu 2+ . It had a large Stokes shift ( λ abs =450 nm, λ ex =490 nm, λ em =690 nm), low detection limits and large binding constants. With the addition of Al 3+ , Cr 3+ , Fe 3+ and Cu 2+ , the fluorescence quenched and the emission peaks blue shifted to different extent. Experimental analysis and quantum chemical calculations showed that the luminescence of DCM-PSI experienced an excited state intramolecular proton transfer (ESIPT) and partly intramolecular charge transfer (ICT) process, while the complexation of Al 3+ , Cr 3+ , Fe 3+ and Cu 2+ caused ligand-to-metal electron transfer, and altered the “push-pull” effect in DCM-PSI . Furthermore, the Al 3+ and Fe 3+ in drinking water was also measured with DCM-PSI to test the practical application of the sensor.
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