1.西华师范大学 环境科学与工程学院,四川 南充 637009
2.四川省遂宁生态环境监测中心站,四川 遂宁 629000
3.西华师范大学 化学化工学院,四川 南充 637009
许肖云,硕士,高级工程师,研究方向:功能材料设计及应用研究,E-mail:xyya369@163.com
纸质出版日期:2024-04-15,
收稿日期:2023-10-23,
修回日期:2023-12-25,
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杨永安,王媛,陈明等.基于香豆素和寡聚芳酰胺的Hg2+荧光探针性能及应用研究[J].分析测试学报,2024,43(04):614-621.
YANG Yong-an,WANG Yuan,CHEN Ming,et al.Study on the Properties and Application of Hg2+ Fluorescent Probe Based on Coumarin and Oligaramide[J].Journal of Instrumental Analysis,2024,43(04):614-621.
杨永安,王媛,陈明等.基于香豆素和寡聚芳酰胺的Hg2+荧光探针性能及应用研究[J].分析测试学报,2024,43(04):614-621. DOI: 10.12452/j.fxcsxb.23102301.
YANG Yong-an,WANG Yuan,CHEN Ming,et al.Study on the Properties and Application of Hg2+ Fluorescent Probe Based on Coumarin and Oligaramide[J].Journal of Instrumental Analysis,2024,43(04):614-621. DOI: 10.12452/j.fxcsxb.23102301.
该文利用含分子内三中心氢键的寡聚芳酰胺三聚体二酸和3-氨基香豆素的酰胺化反应,高效制备了具有一定刚性骨架的荧光探针,采用核磁共振谱、质谱等手段对其结构进行了表征。深入研究了探针的选择性识别、抗干扰以及可逆性等性能,测定了探针和Hg
2+
的配位比及检出限,并研究了其定量检测不同水样中Hg
2+
的能力。结果显示,探针对Hg
2+
表现出优异的选择性,且不受其他金属离子(K
+
、Na
+
、Ca
2+
、Mg
2+
、Cu
2+
、Zn
2+
、Pb
2+
、Cd
2+
、Fe
3+
、Mn
2+
、Ni
2+
、Ag
+
、Cr
3+
、Al
3+
、Co
2+
)的干扰。探针对Hg
2+
识别具有较好的可逆性,二者配位比为1∶1,其检出限为2.08×10
-7
mol/L,满足实际水样检测要求。利用红外光谱和核磁共振氢谱对探针识别Hg
2+
的发光机理进行了推断。此探针可用于不同水样中Hg
2+
的定量检测,检测结果与原子荧光法基本一致,具有较高的准确度和精密度。
A fluorescent probe with a certain rigid skeleton was prepared by amidation of oligaramide trimer diacid with intra-molecular three center hydrogen bond and 3-aminocoumarin. The structure of the probe was characterized by nuclear magnetic resonance(NMR) and mass spectrum(MS). The selective recognition,anti-interference and reversible properties of the probe were studied by fluorescence emission spectra. The coordination ratio and detection limit of the probe and Hg
2+
were determined,and the ability of the probe to quantitatively detect Hg
2+
in different water samples was also studied. The results showed that the probe molecule showed excellent selectivity to Hg
2+
in mixed solution,and was not interfered by other metal ions(K
+
,Na
+
,Ca
2+
,Mg
2+
,Cu
2+
,Zn
2+
,Pb
2+
,Cd
2+
,Fe
3+
,Mn
2+
,Ni
2+
,Ag
+
,Cr
3+
,Al
3+
,Co
2+
). The probe has good reversibility for Hg
2+
. Their coordination ratio is 1∶1,and the detection limit is 2.08×10
-7
mol/L,which met the requirements of actual water sample detection,and the detetion results are similar to those of atomic fluorescence method. The luminescence mechanism of Hg
2+
recognition by the probe molecule was also deduced by the means of infrared spectrum(IR) and hydrogen nuclear magentic resonance(
1
H NMR). The probe can be used for the quantitative detection of Hg
2+
in different water samples with high accuracy and precision.
香豆素寡聚芳酰胺汞离子荧光探针水样
coumarinoligaramidemercury ionfluorescent probewater sample
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