Turn-on and reversible luminescent sensor for selective recognition of Al3+ using naphthol hydrazone
Turn-on and reversible luminescent sensor for selective recognition of Al3+ using naphthol hydrazone
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DOI：
10.1016/j.jlumin.2015.11.014
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发表时间：
2016-04-01
影响因子：
3.6
通讯作者：
Stoeckli-Evans, Helen
中科院分区：
文献类型：
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作者：
Mukherjee, Soma;Mal, Palash;Stoeckli-Evans, Helen
已合成两个配体 1 和 2，用于选择性荧光识别水介质（DMSO 5% v/v，pH 7）中的 Al3+ 离子。在 Al3+ 存在下，配体 2 显示出发射强度的显着增加，并具有相当大的红移，并且与 1 相比，它表现出更好的灵敏度。2 和 2-Al3+ 的量子产率分别确定为 0.006 和 0.196。工作图表明 2 与 Al3+ 的化学计量结合为 1:1，并且根据 Hill 图确定 2-Al3+ 的缔合常数为 1.3 x 10(4) M-1。 Na(2)EDTA的加入猝灭了2-Al3+的荧光，表明配体2是一种可逆的荧光化学传感器，可以检测亚微摩尔浓度的Al3+。配体1的晶体结构是通过单晶X射线衍射得到的。 (C) 2015 Elsevier B.V. 保留所有权利。
Two ligands 1 and 2 have been synthesized for the selective fluorescent recognition of Al3+ ions in aqueous medium (DMSO 5% v/v, pH 7). The ligand 2 displayed dramatic increment of emission intensity with considerable red shift in the presence of Al3+ and it exhibited better sensitivity compared to 1. The quantum yields for 2 and 2-Al3+ were determined as 0.006 and 0.196 respectively. Job plot indicated a 1:1 stoichiometric binding of 2 with Al3+ and the association constant for 2-Al3+ was determined as 1.3 x 10(4) M-1 by the Hill plot. The addition of Na(2)EDTA quenches the fluorescence of 2-Al3+ indicating that the ligand 2 is a reversible fluorescent chemosensor and it can detect submicromolar concentrations of Al3+ The crystal structure of 1 was obtained from single crystal X-ray diffractometry. (C) 2015 Elsevier B.V. All rights reserved.