Department of Chemistry, Anna University, University College of Engineering, Dindigul, Tamil Nadu, 624622, India.
J Fluoresc. 2020 Jan;30(1):91-101. doi: 10.1007/s10895-019-02473-2. Epub 2020 Jan 2.
Novel isonicotinic acid hydrazide functionalized silver nanoparticles (INH-AgNPs) were synthesized by wet chemical method and used for the detection of Hg ions in aqueous medium. The INH-AgNPs exhibit good absorbance and emission peaks by sensing Hg ions with visible color changes. The detection of Hg ions was confirmed by FT-IR, EDAX spectra and by the changing morphology of INH-AgNPs, and after addition of Hg was confirmed by SEM and TEM imaging studies. Based on the emission intensity the probe INH-AgNPs exhibit a lowest detection limit (LOD) of Hg to 0.18 nM. The association constant (K) of INH-AgNPs + Hg ions is calculated using the Bensei-Hildebrand equation. Also, the probe is successfully utilized for the detection of Hg ions in real water samples obtained from different fields, which showed good results.
新型异烟肼酰腙功能化的银纳米粒子（INH-AgNPs）通过湿化学法合成，并用于检测水介质中的 Hg 离子。通过感应 Hg 离子，INH-AgNPs 表现出良好的吸收和发射峰，具有可见的颜色变化。FT-IR、EDAX 光谱和 INH-AgNPs 形态的变化证实了 Hg 离子的检测，而 SEM 和 TEM 成像研究则证实了添加 Hg 后的形态变化。基于发射强度，探针 INH-AgNPs 对 Hg 的最低检测限（LOD）达到 0.18 nM。使用 Bensei-Hildebrand 方程计算了 INH-AgNPs+Hg 离子的缔合常数（K）。此外，该探针还成功用于检测来自不同领域的实际水样中的 Hg 离子，结果良好。
