1 research outputs found
Organic Building Block Based Microporous Network SNW‑1 Coating Fabricated by Multilayer Interbridging Strategy for Efficient Enrichment of Trace Volatiles
Microporous organic polymers (MOPs) are an emerging class
of functional porous materials for diverse potential applications.
Typically, tailored microporous structures of MOPs are generated by
linkages of organic polymerizable monomer building blocks, providing
high permanent porosity and excellent stability. Herein, we reported
the first example of the application of organic building block based
MOPs (OBB-MOPs) as efficient enrichment media for sample preparation.
A novel multilayer interbridging strategy was proposed to fabricate
OBB-MOP coatings, and hereby SNW-1 (a kind of OBB-MOPs) was coated
on silica substrate with well-controlled thickness. Strong covalent
bonds throughout the network and interlayer bridging improved the
durability of the coating significantly. Outstanding chemical stability
was observed in diverse solvents as well as solutions with a wide
range of pH or high ionic strength and even under extremely harsh
conditions like boiling water. The SNW-1 coating possessed a microporous
network structure constructed of conjugated and nitrogen-rich building
blocks. Thus, the coating exhibited a superior enrichment performance
of polycyclic aromatic hydrocarbons and volatile fatty acids (VFAs)
over commercial coatings based on interactions including π–π
affinity and acid–base interaction. For further application,
this coating was combined with gas chromatography/mass spectrometry
for the noninvasive analysis of VFAs from tea leaf and tobacco shred
samples. The low detection limits of 0.014–0.026 μg/L
were achieved with the relative standard deviations (RSDs) between
4.3 and 9.0%. Consequently, trace original VFAs from the samples were
detected. Good recoveries were obtained in the range of 90–129%
and 77–118% with the corresponding RSDs (<i>n</i> = 3) of 2.6–9.3% and 1.9–10%, respectively