Jump to main content
Jump to site search


Water-dispersible hyperbranched conjugated polymer nanoparticles with sulfonate terminal groups for amplified fluorescence sensing of trace TNT in aqueous solution

Author affiliations

Abstract

Conjugated polymers (CPs) have been recognized as promising fluorescent sensing materials for 2,4,6-trinitrotoluene (TNT) vapor. However, their applications for TNT detection in aqueous solution are restricted because of their low sensitivity (detection limits >90 nM). Here we report highly sensitive detection of TNT by water-dispersible hyperbranched conjugated polymer nanoparticles (HCPN-S) with hydrophobic CP cores and hydrophilic sulfonate terminal groups. Based on efficient TNT encapsulation by numerous hydrophobic cavities inside the hyperbranched CP core, HCPN-S exhibits a quenching constant of 1.21 × 106 M−1, two to three orders of magnitude higher than those of CP analogues, allowing amplified detection of TNT with a detection limit of 0.8 ppb (3.7 nM), which is the best result for CP-based fluorescent sensors for TNT detection in water reported so far. Furthermore, HCPN-S can selectively detect TNT even in the presence of 2,4,6-trinitrophenol and other nitro compounds.

Graphical abstract: Water-dispersible hyperbranched conjugated polymer nanoparticles with sulfonate terminal groups for amplified fluorescence sensing of trace TNT in aqueous solution

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Apr 2017, accepted on 17 May 2017 and first published on 18 May 2017


Article type: Research Article
DOI: 10.1039/C7QM00173H
Citation: Mater. Chem. Front., 2017, Advance Article
  •   Request permissions

    Water-dispersible hyperbranched conjugated polymer nanoparticles with sulfonate terminal groups for amplified fluorescence sensing of trace TNT in aqueous solution

    X. Wu, H. Hang, H. Li, Y. Chen, H. Tong and L. Wang, Mater. Chem. Front., 2017, Advance Article , DOI: 10.1039/C7QM00173H

Search articles by author

Spotlight

Advertisements