Schild, Howard G. and Tirrell, David A. (1992) Use of nonradiative energy transfer to explore interpolymer and polymer-solute interactions in aqueous solutions of poly(N-isopropylacrylamide). Macromolecules, 25 (18). pp. 4553-4558. ISSN 0024-9297. doi:10.1021/ma00044a015. https://resolver.caltech.edu/CaltechAUTHORS:SCHIm1992
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Abstract
N-Isopropylacrylamide (NIPAAM) was copolymerized with small quantities of 9-fluorenylmethyl acrylate to yield labeled poly(N-isopropylacrylamide) (PNIPAAM) for use in nonradiative energy transfer (NRET) experiments with various pyrene derivatives in aqueous solution. Microcalorimetry and cloud point measurements of the lower critical solution temperatures (LCST) of these copolymers showed very slight depressions in the LCST as compared to that of the homopolymer. NRET investigations showed no energy transfer from fluorene-labeled PNIPAAM to free pyrene or to PNIPAAM-bound pyrene in mixed aqueous solutions at 24.5 "C in contrast to literature reports of similar work done with (hydroxypropyl)-cellulose. NRET was observed between fluorene-labeled PNIPAAM and amphiphiles with pyrene terminally bound to their hydrocarbon tails. NRET was much more efficient for a quaternary ammonium amphiphile than for a zwitterionic sulfobetaine-based surfactant.
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| Additional Information: | © 1992 American Chemical Society. Received August 5, 1991. This work was supported by a National Science Foundation Predoctoral Fellowship to H.G.S. and by Army Research Grant No. DAAL03-88-K-0038. | |||||||||
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| Issue or Number: | 18 | |||||||||
| DOI: | 10.1021/ma00044a015 | |||||||||
| Record Number: | CaltechAUTHORS:SCHIm1992 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:SCHIm1992 | |||||||||
| Official Citation: | Use of nonradiative energy transfer to explore interpolymer and polymer-solute interactions in aqueous solutions of poly(N-isopropylacrylamide) Howard G. Schild and David A. Tirrell Macromolecules 1992 25 (18), 4553-4558 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 53500 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Anne Hormann | |||||||||
| Deposited On: | 26 Jan 2015 21:48 | |||||||||
| Last Modified: | 10 Nov 2021 20:02 |
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