Abstract
Novel fluorescent poly(2-(acetoacetoxy)ethyl methacrylate)(PAAEMA) latexes have been synthesized by miniemulsion polymerization employing a polymeric costabilizer. Nanoscale aggregates of macromolecules bearing β-dicarbonyl are formed in the prepared latex particles. Ammonia and the β-dicarbonyl aggregates assemble a supramolecular complex, which exhibits strong visible fluorescence under UV light. The formation of the complex is confirmed by the characteristic absorption peak located at about 275. nm in UV-Vis spectra. The absorption spectrum has been found to be applicable for ammonia detection. Atomic Force Microscopy (AFM) studies of surface morphology reveal that gas-sensing properties of the PAAEMA thin films involve the reversible absorption and desorption of ammonia. PAAEMA thin films are sensitive to ammonia gas and have a short response time of 80. s when exposed to 54. ppm of ammonia gas concentration.
| Original language | English |
|---|---|
| Pages (from-to) | 94-101 |
| Number of pages | 8 |
| Journal | Journal of Colloid and Interface Science |
| Volume | 373 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 May 2012 |
| Externally published | Yes |
Keywords
- β-Dicarbonyl aggregation
- Ammonia sensing
- Fluorescent chemosensor
- Polymer thin film
- Supramolecular complex
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biomaterials
- Surfaces, Coatings and Films
- Colloid and Surface Chemistry