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Tuning the Thermoresponsiveness of Weak Polyelectrolytes by pH and Light: Lower and Upper Critical-Solution Temperature of Poly(N,N-dimethylaminoethyl methacrylate)
Abstract
The presence of multivalent counterions induces an upper critical solution temperature (UCST) in addition to the known lower critical solution temperature (LCST) of poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA). The LCST-type cloud points can be adjusted by pH of the buffer, whereas the UCST-type cloud points can be adjusted by the concentration of trivalent counterions. High pH favors the LCST transition, whereas lower pH extends the UCST-type miscibility gap at constant concentration of trivalent counterions. By use of hexacyanocobaltate(III) as a trivalent counterion, we can even switch off again the UCST-behavior by UV-illumination (photoinduced dissolution).
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Cited by
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Treat, N. J., Sprafke, H., Kramer, J. W., Clark, P. G., Barton, B. E., Read de Alaniz, J., Fors, B. P., & Hawker, C. J. (2014) · Journal of the American Chemical Society · doi:10.1021/ja510389m · Cited by 939
pH ‐sensitive polymers: Classification and some fine potential applications
Ofridam, F., Tarhini, M., Lebaz, N., Gagnière, É., Mangin, D., & Elaissari, A. (2021) · Polymers for Advanced Technologies · doi:10.1002/pat.5230 · Cited by 286
Plamper, F. A., McKee, J. R., Laukkanen, A., Nykänen, A., Walther, A., Ruokolainen, J., Aseyev, V., & Tenhu, H. (2009) · Soft Matter · doi:10.1039/b822143j · Cited by 74
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Metadata
- Authors
- Plamper, F. A., Ballauff, M., & Müller, A. H. E.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-11-07
- Volume
- 129
- Issue
- 47
- Pages
- 14538-14539
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2091612114
- Cited by
- 260
- References
- 0
- FWCI
- 5.18
- Type
- journal article
- Language
- en
- Open access
- closed
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- Plamper, F. A., Ballauff, M., & Müller, A. H. E. (2007). Tuning the Thermoresponsiveness of Weak Polyelectrolytes by pH and Light: Lower and Upper Critical-Solution Temperature of Poly(N,N-dimethylaminoethyl methacrylate). Journal of the American Chemical Society. https://doi.org/10.1021/ja074720i
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