State Key Laboratory of Silicon Materials, Department of Materials Science & Engineering, Zhejiang University, Hangzhou, China.
Analyst. 2011 Dec 21;136(24):5283-6. doi: 10.1039/c1an15765e. Epub 2011 Oct 19.
A novel fluorescence chemosensor based on 2,6-dicarbonylpyridine was designed and synthesized and its photophysical properties were characterized. Upon coordination of Co(2+) by the central 2,6-dicarbonylpyridinyl functional group, the chemosensor 2,6-bis(4-diphenylamino-styrylcarbonyl)pyridine (PhPy) showed nearly complete fluorescence quenching, while no fluorescence response was seen towards other competing cations. The experimental results show the chemosensor is highly selective and sensitive towards Co(2+) in the presence of competing ions, even in the ppb range. Job plot analysis was carried out and the results suggested that the binding of PhPy and Co(2+) was probably a 2 : 1 stoichiometry.
基于 2,6-二羰基吡啶设计并合成了一种新型荧光化学传感器，并对其光物理性质进行了表征。在中心 2,6-二羰基吡啶官能团与 Co(2+)配位后，化学传感器 2,6-双(4-二苯基氨基-苯乙烯基)吡啶(PhPy)几乎完全荧光猝灭，而对于其他竞争阳离子则没有荧光响应。实验结果表明，该化学传感器在存在竞争离子的情况下对 Co(2+)具有高选择性和高灵敏度，甚至在 ppb 范围内也是如此。进行了Job 图分析，结果表明 PhPy 与 Co(2+)的结合可能是 2:1 的化学计量比。
