Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazu Ave. No. 24, 300223 Timisoara, Romania.
Laboratory of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda No. 41A, RO-700487 Iasi, Romania.
Int J Mol Sci. 2019 Feb 7;20(3):710. doi: 10.3390/ijms20030710.
The development of UV⁻vis spectrophotometric methods based on metalloporphyrins for fast, highly sensitive and selective anion detection, which avoids several of the practical challenges associated with other detection methods, is of tremendous importance in analytical chemistry. In this study, we focused on achieving a selective optical sensor for triiodide ion detection in traces based on a novel hybrid material comprised of Pt(II) 5,10,15,20-tetra(4-methoxy-phenyl)-porphyrin (PtTMeOPP) and gold nanoparticles (AuNPs). This sensor has high relevance in medical physiological tests. The structure of PtTMeOPP was investigated by single crystal X-ray diffraction in order to understand the metal surroundings and the molecule conformation and to assess if it qualifies as a potential sensitive material. It was proven that the Pt-porphyrin generated 1D H-bond supramolecular chains due to the weak C-H···O intermolecular hydrogen bonding. The presence of ordered voids in the crystal encouraged us to use PtTMeOPP as the sensing material for triiodide ion and to enhance its potential in a novel AuNPs/PtTMeOPP hybrid by the synergistic effects provided by the plasmonic gold nanoparticles. The spectrophotometric sensor is characterized by a detection limit of 1.5 × 10 M triiodide ion concentration and a remarkable confidence coefficient of 99.98%.
基于金属卟啉的 UV⁻vis 分光光度法的发展对于快速、高灵敏度和选择性阴离子检测非常重要，它避免了与其他检测方法相关的一些实际挑战。在这项研究中，我们专注于基于新型混合材料（由 Pt(II) 5,10,15,20-四（4-甲氧基-苯基）卟啉（PtTMeOPP）和金纳米粒子（AuNPs）组成）实现痕量三碘化物离子选择性光学传感器。该传感器在医学生理测试中具有很高的相关性。通过单晶 X 射线衍射研究了 PtTMeOPP 的结构，以了解金属环境和分子构象，并评估其是否有资格成为潜在的敏感材料。证明 Pt-卟啉由于弱 C-H···O 分子间氢键生成了 1D H 键超分子链。晶体中有序的空隙存在促使我们将 PtTMeOPP 用作三碘化物离子的传感材料，并通过等离子体金纳米粒子提供的协同效应增强其在新型 AuNPs/PtTMeOPP 混合体中的潜力。分光光度传感器的检测限为 1.5×10 M 三碘化物离子浓度，置信系数为 99.98%。
