The self-assembled Ru(bpy)3(PF6)2 nanoparticle on polystyrene microfibers and its application for ECL sensing

Area of Science:

• Materials Science
• Electrochemistry
• Analytical Chemistry

Background:

• Ruthenium complexes are widely used in electrochemiluminescence (ECL) applications.
• Developing efficient and stable ECL emitters on polymer supports is crucial for sensor technology.
• Sulfonated polystyrene (SPS) microfibers offer a promising platform due to their adsorptive properties.

Purpose of the Study:

• To self-assemble ruthenium nanoparticle tris(2,2′-bipyridyl)ruthenium(II) bis(hexafluorophosphate) (RuNP) onto SPS microfibers.
• To investigate the enhanced ECL properties of the fabricated RuNP/SPS microfibers.
• To develop a cost-effective ECL sensor for detecting α-naphthol.

Main Methods:

• Self-assembly of RuNP onto SPS electrospun microfibers.
• Characterization of RuNP formation and adsorption efficiency.
• Fabrication and testing of an ECL sensor for α-naphthol detection.

Main Results:

• Achieved 94% adsorption of Ru(bpy)3(2+) onto SPS microfibers.
• RuNP/SPS microfibers showed significantly enhanced ECL emission (2.3-6.6 times higher).
• Developed an ECL sensor with a detection limit of 1.0 nM for α-naphthol, successfully applied to pesticide samples.

Conclusions:

• The self-assembly method provides a simple and cost-effective way to create RuNP-functionalized polymer microfibers.
• The enhanced ECL properties make RuNP/SPS microfibers highly suitable for sensitive chemo/biosensor applications.
• The developed sensor demonstrates practical utility for analyzing α-naphthol in real-world samples like pesticides.