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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Kurzbach, Dennis Kattnig, Daniel R. Hinderberger, Dariush Zhang, Baozhong Schlüter, A. Dieter |
| Copyright Year | 2012 |
| Abstract | The incorporation of stearic acids into peripherally charged dendronized polymers (denpols) and their release, initiated by external triggers, is characterized in solution. Using continuous wave electron paramagnetic resonance (CW EPR) spectroscopy on spin-labeled stearic acid derivatives it is found that – depending on the generation (1–4) of the dendron side groups – up to 2.2 of these spin probes can be hosted per macro-monomer unit of a denpol. The orientation of the stearic acid guests inside the denpols is further determined by double electron–electron resonance (DEER) experiments. To this end, the dipolar coupling between 15N-labeled dianionic spin probes (Fremy's salt), self-assembled on the surface of the cylindrical denpols, and the incorporated spin-labeled fatty acids is measured. The arrangement of these fatty acid guest molecules is comparable to the arrangement of fatty acids incorporated in layers of ionic surfactants, the carboxyl group pointing towards the periphery and the hydrophobic tail into the hydrophobic interior. The loading capacity of the denpols scales exponentially with their generation. Finally, the fatty acid guests can be released from the denpols by increasing pH or charge screening. |
| Starting Page | 2550 |
| Ending Page | 2558 |
| Page Count | 9 |
| File Format | HTM / HTML PDF |
| ISSN | 20416520 |
| Volume Number | 3 |
| Issue Number | 8 |
| Journal | Chemical Science |
| DOI | 10.1039/c2sc20435e |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Spectroscopy Solid-state nuclear magnetic resonance Hydrophobe Dendronized polymer Continuous wave CW EPR Spin label Carboxylic acid The Arrangement (1969 film) Fatty acid Laser PH Electron paramagnetic resonance Nuclear magnetic resonance |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
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