一种新型席夫碱作为水溶液中铜（II）离子荧光传感器。
A novel Schiff-base as a Cu(II) ion fluorescent sensor in aqueous solution.
作者信息
Gündüz Z Yurtman, Gündüz C, Özpınar C, Urucu O Aydın
机构信息
Chemistry Department, Faculty of Arts and Sciences, Marmara University, Turkey.
Çanakkale Onsekiz Mart University, Biga Vocational School, Department of Chemistry Technology, Biga 17200, Çanakale, Turkey.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Feb 5;136 Pt C:1679-83. doi: 10.1016/j.saa.2014.10.066. Epub 2014 Oct 27.
A new fluorescent Cu(II) sensor (L) obtained from the Schiff base of 5,5'-methylene-bis-salicylaldehyde with amidol (2,4-diaminophenol) was synthesized and characterized by FT-IR, MS, (1)H NMR, (13)C NMR techniques. In the presence of pH 6.5 (KHPO4-Na2HPO4) buffer solutions, copper reacted with L to form a stable 2:1 complex. Fluorescence spectroscopic study showed that Schiff base is highly sensitive towards Cu(II) over other metal ions (K(+), Na(+), Al(3+), Ni(2+), Co(2+), Fe(3+), Zn(2+), Pb(2+)) in DMSO/H2O (30%, v/v). The sensor L was successfully applied to the determination of copper in standard reference material. The structural properties and molecular orbitals of the complex formed between L and Cu(2+) ions were also investigated using quantum chemical computations.
合成了一种新型荧光铜（II）传感器（L），它由5,5'-亚甲基双水杨醛与氨基酚（2,4-二氨基苯酚）的席夫碱制得，并通过傅里叶变换红外光谱（FT-IR）、质谱（MS）、核磁共振氢谱（¹H NMR）、核磁共振碳谱（¹³C NMR）技术对其进行了表征。在pH 6.5（KHPO₄-Na₂HPO₄）缓冲溶液存在下，铜与L反应形成稳定的2:1配合物。荧光光谱研究表明，在二甲基亚砜/水（30%，v/v）中，席夫碱对铜（II）的敏感性高于其他金属离子（K⁺、Na⁺、Al³⁺、Ni²⁺、Co²⁺、Fe³⁺、Zn²⁺、Pb²⁺）。传感器L成功应用于标准参考物质中铜的测定。还用量子化学计算研究了L与Cu²⁺离子形成的配合物的结构性质和分子轨道。
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