Journal
POLYMER CHEMISTRY
Volume 5, Issue 15, Pages 4521-4525Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4py00305e
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Funding
- 973 Project [2009CB623601, 2009CB930603]
- Science Fund for Creative Research Groups [20921061]
- National Natural Science Foundation of China [51173179, 21204080, 21074130, 21322403]
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Solution-dispersed porous hyperbranched conjugated polymer nanoparticles (PHCPN) were prepared via Suzuki polymerization in a toluene-in-water miniemulsion system. PHCPN with an average particle size of 40-120 nm can disperse in common organic solvents and show blue emission. PHCPN exhibit a much larger specific surface area (133 m(2) g(-1)), compared with the analogues, hyperbranched conjugated polymer nanoparticles (HCPN, 13 m(2) g(-1)) with octyl chains and a linear conjugated polymer (LCP, 0 m(2) g(-1)). Moreover, PHCPN have enhanced sensitivity in both a THF dispersion and the solid state due to facile diffusion of TNT inside the porous conjugated polymer network structure. Especially, PHCPN-coated indicating papers can visually and reversibly detect trace TNT particulates with a low detection limit of 0.5 ng mm(-2), which is about 20-fold more sensitive than that of the linear conjugated polymer (LCP).
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