Hyperbranched polymers containing stereocontorted cores as on-line solid-phase microextraction adsorbent for...

Area of Science:

• Analytical Chemistry
• Polymer Science
• Environmental Science

Background:

• Polycyclic aromatic hydrocarbons (PAHs) are significant environmental pollutants.
• Efficient extraction methods are crucial for PAH analysis.
• Click chemistry offers a versatile platform for material synthesis.

Purpose of the Study:

• To develop a novel polymer monolith column for on-line solid phase microextraction (SPME) of PAHs.
• To utilize click chemistry for synthesizing a porous polymer with spirocyclic cross-links.
• To evaluate the performance and optimize conditions for PAH enrichment.

Main Methods:

• Synthesis of a polymer monolith using click chemistry with 2,2',7,7'-tetraethynyl-9,9'-spirobifluorene (TES) and 1,4-bis(6-azidoalkoxy)benzene (BAB) monomers.
• Utilizing Cu(PPh3)3Br as a catalyst for the polymerization reaction.
• On-line solid phase microextraction coupled with optimization of extraction parameters.

Main Results:

• The synthesized polymer monolith exhibited porosity and suitable interspace for PAH molecules.
• Enrichment factors for PAHs ranged from 100 to over 1000 times.
• Enrichment was attributed to π-π stacking interactions and the small size of the polymer's pores.
• Optimization of microextraction factors and validation of analytical conditions were performed.

Conclusions:

• A novel click chemistry-based polymer monolith column is effective for on-line SPME of PAHs.
• The developed method provides significant enrichment of PAHs, improving analytical sensitivity.
• The spirocyclic structure contributes to efficient PAH adsorption and extraction.