2-羟基萘甲醛苯甲酰腙衍生物对Al3+的裸眼识别和荧光传感

doi:10.11944/j.issn.1000-0518.2016.05.150333

摘要/Abstract

摘要：

设计合成了化合物4-羟基苯甲酰-(2-羟基萘甲醛)腙(L)探针,经金属离子识别研究发现探针L对Al³⁺具有良好的荧光增强识别效果且不受其它金属离子的干扰,且识别过程中溶液的颜色发生了明显变化,可以实现Al³⁺的可视法检测,核磁滴定、job-plot、基质辅助激光解吸电离飞行时间质谱(MALDI-TOF)等实验结果显示,探针L与Al³⁺以摩尔比2:1的方式进行配位。通过对紫外滴定数据的非线性拟合分析,探针L与Al³⁺的结合常数为1.3×10⁴ L/mol,最低检测限为3.71×10^-6 L/mol。因此,该腙类衍生物作为Al³⁺的荧光及比色探针,识别体系线性范围较宽,检测限低,在痕量Al³⁺的检测方面具有潜在的应用价值。

关键词: 羟基萘甲醛, 荧光探针, 裸眼识别, 铝离子

Abstract:

The probe 4-hydroxy-benzoyl-(2-hydroxy-naphthalene-formaldehyde) hydrazone(L) was synthesized and evaluated. The UV-Vis and fluorescence spectra suggested that probe L has highly Al³⁺-selective affinity over others commonly coexistent metal ions by fluorescence enhancing. Meanwhile, the color change of probe L solution after addition of Al³⁺ is obvious. ¹H NMR titration, job-plot, and (MALDI-TOF) results indicate that the complex molar ratio of Al³⁺/L is 1:2. The binding constant of Al³⁺/L is calculated to be 1.3×10⁴ L/mol by nonlinear curve-fitting based on the UV-Vis titration data, and the detection limit reaches 3.71×10^-6 L/mol. The UV-Vis and fluorescence emission titration experiment show that a wide range and low detection limit can be achieved in the present sensing system. This result suggests that the probe L has potential application in determination of trace Al³⁺ ions.

Key words: hydroxy-naphthaldehyde, fluorescent chemosensor, “naked-eye&rdquo, recognition, aluminum ion

陈虹蓉, 伍亚男, 陈仕焰, 马培华, 倪新龙. 2-羟基萘甲醛苯甲酰腙衍生物对Al³⁺的裸眼识别和荧光传感[J]. 应用化学, 2016, 33(5): 599-605.

CHEN Hongrong, WU Ya'nan, CHEN Shiyan, MA Peihua, NI Xinlong. “Naked-eye” and Fluorescence “Turn-on” Recognition of Al³⁺ Based on 2-Hydroxy-Naphthalene-Formaldehyde Benzoyl-Hydrazone Derivatives[J]. Chinese Journal of Applied Chemistry, 2016, 33(5): 599-605.

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2-羟基萘甲醛苯甲酰腙衍生物对Al³⁺的裸眼识别和荧光传感

“Naked-eye” and Fluorescence “Turn-on” Recognition of Al³⁺ Based on 2-Hydroxy-Naphthalene-Formaldehyde Benzoyl-Hydrazone Derivatives

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