High-resolution performance of triptycene functionalized with polycaprolactones for gas chromatography

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Developing selective stationary phases is crucial for separating similar analytes in complex samples.
• Gas chromatography (GC) requires advanced stationary phases for high-resolution separations.

Purpose of the Study:

• To introduce a new triptycene-based material functionalized with polycaprolactone (TP-PCL) as a stationary phase for GC.
• To evaluate the high-resolution performance, selectivity, and stability of the TP-PCL stationary phase.

Main Methods:

• Synthesis of a novel triptycene-based material functionalized with polycaprolactone moieties (TP-PCL).
• Evaluation of the TP-PCL material as a stationary phase in a capillary gas chromatography column.
• Assessment of column efficiency, polarity, resolution of isomers, repeatability, reproducibility, and thermal stability.

Main Results:

• The TP-PCL column achieved high efficiency (5555 plates/m) and moderate polarity.
• Dozens of positional and structural isomers, including substituted benzene derivatives, naphthalene derivatives, alkanes, and alcohols, were well resolved.
• TP-PCL demonstrated superior resolution for critical pairs (e.g., alkylbenzenes, phenols) compared to PCL and DB-35 MS columns.
• Excellent repeatability (RSD 0.02%-0.07%) and reproducibility (RSD 0.11%-4.7%) were observed.
• Enhanced thermal stability and practical applicability in analyzing Artemisiae argyi essential oil were confirmed.

Conclusions:

• The developed TP-PCL stationary phase offers high-resolution separation capabilities for gas chromatography.
• TP-PCL exhibits advantageous selectivity, stability, and reproducibility, outperforming existing commercial columns for specific isomer separations.
• This material shows significant potential for practical applications in complex sample analysis.