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Solid-Phase Spectrometric Determination of Organic Thiols Using a Nanocomposite Based on Silver Triangular Nanoplates
Aleksei Furletov1, Vladimir Apyari1, Pavel Volkov2
1Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
Sensors (Basel, Switzerland)
|September 28, 2023
Summary
Researchers developed a novel composite material using silver triangular nanoplates (AgTNPs) and polyurethane foam for detecting organic thiols. This method offers a simple, visual, and cost-effective approach for chemical analysis, applicable to real-world samples.
Area of Science:
- Materials Science
- Analytical Chemistry
- Nanotechnology
Background:
- Polymer-nanoparticle composites can alter analytical method characteristics.
- Silver nanoparticles (AgNPs) adsorption on polymers influences their analytical performance.
- Developing new materials for sensitive chemical detection is crucial.
Purpose of the Study:
- To propose and validate a composite material of silver triangular nanoplates (AgTNPs) and polyurethane foam for chemical analysis.
- To investigate the application of this composite for solid-phase/colorimetric determination of organic thiols.
- To assess the sensitivity and applicability of the developed method.
Main Methods:
- Fabrication of a composite material using silver triangular nanoplates (AgTNPs) and polyurethane foam.
- Utilizing the colorimetric response of AgTNPs aggregation upon interaction with thiols.
- Spectroscopic analysis (localized surface plasmon resonance) and visual/household device detection.
- Testing with four different organic thiols (cysteamine, 2-mercaptoethanol, cysteine, 3-mercaptopropionic acid).
Main Results:
- The composite material enabled the solid-phase/colorimetric determination of organic thiols.
- Thiol-induced aggregation of AgTNPs caused a decrease and broadening of the localized surface plasmon resonance band.
- Spectral changes were detectable visually and with simple color-recording devices.
- Achieved limits of detection for cysteamine, 2-mercaptoethanol, cysteine, and 3-mercaptopropionic acid were 50, 160, 500, and 500 nM, respectively.
- The method demonstrated applicability in analyzing real samples from pharmaceuticals and food products.
Conclusions:
- The developed AgTNPs-polyurethane foam composite is effective for the sensitive and selective determination of organic thiols.
- The colorimetric response provides a simple and accessible detection mechanism.
- This approach holds promise for cost-effective and on-site chemical analysis of thiols in various matrices.
