Abstract
Phase change and fluorescence properties of the polydiphenylacetylene derivative, poly[1-phenyl-2-(ptrimethysilyl) phenylacetylene] (PTMSDPA), were investigated according to the thermally induced phase separation (TIPS) method. 1,4-dioxane was selected as the theta solvent from solvents having solubility parameters similar to that of the polymer, and the phase diagram of the solution of PTMSDPA/1,4-dioxane was derived using the cloud-point method. A critical point appeared at a concentration of 0.88×10-2 M and a temperature of 51.6 oC as the theta condition. During the cooling process, a significant fluorescence enhancement occurred near the critical point, because collision quenching and vibration relaxation in the polymer chain, which causes non-radiative emission decay, are restrained by the abrupt phase separation between the polymer and the solvent. This study provides a tentative method for producing highly fluorescent nanoparticles and microporous membranes by applying TIPS to fluorescent conjugated polymers.
| Translated title of the contribution | Critical Fluorescence Enhancement of a Polydiphenylacetylene Derivative through Thermally Induced Phase Separation |
|---|---|
| Original language | Korean |
| Pages (from-to) | 628-632 |
| Number of pages | 5 |
| Journal | Polymer (Korea) |
| Volume | 45 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jul 2021 |
Keywords
- Fluorescence emission
- Phase diagram
- Polydiphenylacetylene
- Thermally induced phase separation
- Theta solvent