Abstract
Finely structured diphenylacetylene polymer nanofiberswere successfully prepared by a freeze dryingmethod. SEMrevealed that themorphology and structure of the fiberswere significantly dependent on the concentration of the polymer solution, the 'frozen in' quenching temperature and the chemical structure of the polymer derivatives. Polarized fluorescence spectroscopy revealed that the polymer chains within the nanofiber were uniaxially oriented and highly elongated. The polymer nanofiber was remarkably sensitive to explosive nitroaromatic compounds when compared to the corresponding thin films. The fluorescence of polymer nanofiber obtained from 0.003 wt.-% cryogenic benzene solution rapidly decreased to 50% of its initial value in ≈35 s by exposing to 2,4-dinitrotoluene.
| Original language | English |
|---|---|
| Pages (from-to) | 1900-1908 |
| Number of pages | 9 |
| Journal | Macromolecular Chemistry and Physics |
| Volume | 211 |
| Issue number | 17 |
| DOIs | |
| State | Published - 1 Sep 2010 |
Keywords
- Conjugated polymers
- Fluorescence
- Nanotechnology
- Orientation
- Sensors