2-吡啶甲酰基对苯二腙与铁（Ⅲ）相互作用的光谱研究及其分析应用。
Spectral study of the interaction between 2-pyridinecarbaldehyde-p-phenyldihydrazone and ferric iron and its analytical application.
机构信息
College of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Jun 15;92:78-83. doi: 10.1016/j.saa.2012.02.049. Epub 2012 Feb 22.
The synthesis and spectral characterization of a schiff base, 2-pyridinecarbaldehyde-p-phenylenedihydrazone (short for 2PC-PPH), were described. It was found that ferric ion (Fe(3+)) could selectively quench the fluorescence of 2PC-PPH, whereas many other metal ions, such as Mn(2+), Zn(2+), Cu(2+), K(+), Al(3+), Ca(2+), Ni(2+), Co(2+), Cr(3+) and Fe(2+), could not quench its fluorescence. Based on this, a sensitive method for ferric ion selective detection was established. Under the optimum conditions, the decreasing fluorescence intensity of 2PC-PPH is proportional to the concentration of Fe(3+) within the range of 6.0×10(-7)-1.0×10(-5) mol L(-1). The detection limit (3σ) for Fe(3+) determination is 3.6×10(-7) mol L(-1). The proposed method was successfully applied to determine iron in tea and milk powder.
描述了一种席夫碱，2-吡啶甲醛对苯二腙（简称 2PC-PPH）的合成及光谱特性。研究发现，三价铁离子（Fe(3+)）可以选择性猝灭 2PC-PPH 的荧光，而许多其他金属离子，如 Mn(2+)、Zn(2+)、Cu(2+)、K(+)、Al(3+)、Ca(2+)、Ni(2+)、Co(2+)、Cr(3+)和 Fe(2+)，则不能猝灭其荧光。基于此，建立了一种用于选择性检测铁离子的灵敏方法。在最佳条件下，2PC-PPH 的荧光强度随 Fe(3+)浓度的变化在 6.0×10(-7)-1.0×10(-5) mol L(-1)范围内呈线性下降。Fe(3+)测定的检测限（3σ）为 3.6×10(-7) mol L(-1)。该方法成功地应用于茶叶和奶粉中铁的测定。
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