Dual-Emissive Waterborne Polyurethanes Prepared from Naphthalimide Derivative
| Autor: | Xingyuan Zhang, Qidong Wang, Huang Xiaowen, Yipeng Deng, Fei Xu, Tao Wang, Wei Sun |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
dual-emissive waterborne polyurethane Polymers and Plastics 02 engineering and technology Bromine atom 010402 general chemistry Photochemistry 01 natural sciences Article fluorescence room-temperature phosphorescence halogen atom effect excimers lcsh:QD241-441 chemistry.chemical_compound lcsh:Organic chemistry Atom Singlet state General Chemistry 021001 nanoscience & nanotechnology Fluorescence 0104 chemical sciences chemistry Halogen 0210 nano-technology Phosphorescence Luminescence Derivative (chemistry) |
| Zdroj: | Polymers Polymers, Vol 9, Iss 9, p 411 (2017) Polymers; Volume 9; Issue 9; Pages: 411 |
| ISSN: | 2073-4360 |
| Popis: | Fluorescent and room-temperature phosphorescent (RTP) materials are widely used in bioimaging, chemical sensing, optoelectronics and encryption. Here, a series of single-component dual-emissive waterborne polyurethanes (WPUs) with both fluorescence and room-temperature phosphorescence were synthesized. Dye without halogen atom incorporated into WPUs can only exhibit fluorescence due to poor spin-orbit coupling. When bromine atom is introduced into dye, we found that WPUs can emit both fluorescence and room-temperature phosphorescence with lifetimes up to milliseconds because of enhanced spin-orbit coupling. Moreover, with an increase in dye concentrations in WPUs, excimers are formed due to the aggregation effect, and may promote communication between singlet and triplet states. At different dye concentrations, structural, thermal, and luminescent properties serve as the main focus. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|