Pach Adrianna, Podborska Agnieszka, Luty-Błocho Magdalena
AGH University of Krakow, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Krakow, Poland.
AGH University of Krakow, Academic Centre for Materials and Nanotechnology, Al. A. Mickiewicza 30, 30-059 Krakow, Poland.
Int J Mol Sci. 2025 Jun 11;26(12):5613. doi: 10.3390/ijms26125613.
A tandem UV-Vis and fluorescence spectroscopy method was developed for the detection of Pd(II) ions in ethanol. The formation of a complex between Pd(II) ions and tropaeolin OO (TR OO) is accompanied by a change in the color of the solution and evolution of the characteristic UV-Vis as well as fluorescence spectra. The optimal detection conditions were achieved at a 3:1 (mL/mL) volume ratio of Pd(II) to TR OO, at 50 °C. UV-Vis spectroscopy enabled the detection of complex formation process over time, while fluorescence spectroscopy allowed a rapid response within 10 min. The limit of detection (LOD) of Pd(II) ions using UV-Vis spectrophotometry was 10 μmol/dm at 535 nm. For spectrofluorimetric detection, the LOD was 10 μmol/dm, with an emission signal observed at 630 nm after 10 min. The kinetics studies showed a stepwise complex formation pathway, supported by DFT calculations. The performance of the method was verified in the presence of interfering metal ions, including Li(I), Na(I), Al(III), Ni(II), Mg(II), Ca(II), Co(II), and Zn(II), confirming its applicability in complex matrices. This approach provides efficient palladium determination in organic solvents, contributing to sustainable practices in metal recycling.
开发了一种串联紫外可见和荧光光谱法用于检测乙醇中的钯（II）离子。钯（II）离子与金莲橙OO（TR OO）形成络合物时，溶液颜色会发生变化，并产生特征性的紫外可见光谱和荧光光谱。在钯（II）与TR OO的体积比为3:1（mL/mL）、温度为50°C的条件下实现了最佳检测条件。紫外可见光谱能够监测络合物随时间的形成过程，而荧光光谱则能在10分钟内给出快速响应。使用紫外可见分光光度法在535nm处检测钯（II）离子的检测限为10μmol/dm。对于荧光光谱检测，检测限为10μmol/dm，10分钟后在630nm处观察到发射信号。动力学研究表明存在逐步形成络合物的途径，这得到了密度泛函理论计算的支持。该方法在包括锂（I）、钠（I）、铝（III）、镍（II）、镁（II）、钙（II）、钴（II）和锌（II）等干扰金属离子存在的情况下进行了验证，证实了其在复杂基质中的适用性。这种方法为有机溶剂中钯的高效测定提供了可能，有助于金属回收中的可持续实践。
