UV–Vis Detection of Thioacetamide: Balancing the Performances of a Mn(III)-Porphyrin, Gold Colloid, and Their Complex for Selecting the Most Sensitive Material
Camelia Epuran, Ion Fratilescu, Ionela Fringu, Anca Lascu, Liliana Halip, Mihaela Gherban, Eugenia Fagadar-Cosma
TL;DR
This study compares different materials for detecting thioacetamide, finding that a complex of a porphyrin and gold nanoparticles offers the highest sensitivity.
Contribution
The study introduces a novel complex of Mn(III)-porphyrin and gold nanoparticles for enhanced thioacetamide detection sensitivity.
Findings
Mn-3,4-diMeOPP detects thioacetamide in a linear range of 3.13 × 10−8 M–7.67 × 10−7 M.
The Mn-3,4-diMeOPP–AuNPs complex detects thioacetamide in a trace domain of 1.99 × 10−8 M–1.76 × 10−7 M.
The complex's detection mechanism involves electrostatic interactions between the porphyrin and thioacetamide.
Abstract
The optical detection of thioacetamide was investigated using a metalated porphyrin, Mn(III)-5,10,15,20-tetrakis-(3,4-dimethoxyphenyl)-21H,23H-porphyrin chloride (Mn-3,4-diMeOPP), a gold colloid solution (AuNPs), and a complex formed between them (Mn-3,4-diMeOPP–AuNPs) in order to select the most sensitive material and to achieve complementarity between methods. Mn-3,4-diMeOPP, AuNPs, and their complex were synthesized and characterized by means of UV–Vis, FT-IR spectrometry, and AFM investigations. It could be concluded that Mn-3,4-diMeOPP could detect/quantify thioacetamide (TAA) in the range 3.13 × 10−8 M–7.67 × 10−7 M in a linear fashion, with a 99.85% confidence coefficient. The gold colloidal particles alone could detect TAA in an extremely narrow concentration domain of 2–9.8 × 10−7 M, slightly complementary with that of Mn-3,4-diMeOPP. The complex between Mn-3,4-diMeOPP and gold…
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Taxonomy
TopicsElectrochemical sensors and biosensors · Molecular Sensors and Ion Detection · Advanced Nanomaterials in Catalysis