Gao Cunji, Zang Peixian, Liu Weisheng, Tang Yu
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
J Fluoresc. 2016 Nov;26(6):2015-2021. doi: 10.1007/s10895-016-1895-z. Epub 2016 Aug 3.
An efficient "off-on" type fluorescent chemosensor, (E)-N'-(4-(diethylamino)-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H L), based on Schiff base for the determination of Al has been designed, synthesized, and evaluated. Upon treated with Al, the fluorescence of H L was enhanced 45-fold due to the chelation-enhanced fluorescence (CHEF) effect based on the formation of a 1:1 complex between the chemosensor and Al. Other metal ions, such as Na, K, Mg, Ca, Cu, Ga, Zn, Cr, Cd, Ag, Fe, In, Mn, Pb, Co, and Ni had little effect on the fluorescence. The results demonstrate that the chemosensor H L has stronger affinity with Al than other metal ions. The detection limit of H L for sensing Al is 3.60 × 10 M in EtOH-HO (3:7, v/v) solution. And the recognizing behavior has been investigated both experimentally and computationally.
设计、合成并评估了一种基于席夫碱的高效“开-关”型荧光化学传感器(E)-N'-(4-(二乙氨基)-2-羟基苄叉基)-2-羟基苯甲酰肼(H L)，用于测定铝。用铝处理后，由于化学传感器与铝形成1:1配合物而产生螯合增强荧光(CHEF)效应，H L的荧光增强了45倍。其他金属离子，如钠、钾、镁、钙、铜、镓、锌、铬、镉、银、铁、铟、锰、铅、钴和镍对荧光影响很小。结果表明，化学传感器H L与铝的亲和力比其他金属离子更强。在乙醇-水(3:7, v/v)溶液中，H L检测铝的检出限为3.60×10 M。并且通过实验和计算研究了识别行为。
