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Fluorescence of commercial Pluronic F127 samples: Temperature-dependent micellization
journal contribution
posted on 2023-06-08, 12:30 authored by Christopher C Perry, Theodore S Sabir, Wesley J Livingston, Jamie R Milligan, Qiao ChenQiao Chen, Victoria Maskiewicz, Danilo S BoskovicWe present a novel approach of using the butylated hydroxytoluene (BHT) antioxidant found in commercial Pluronic F127 samples as a marker of polymer aggregation. The BHT marker was compared to the pyrene dye and static light scattering methods as a way to measure the critical micelle concentration (CMC) and critical micelle temperature (CMT). The n?p(*) transitions of BHT are sensitive to the microenvironment as demonstrated by plotting the fractional intensities of its excitation (˜280nm) and emission (˜325nm) peaks. BHT is more sensitive to changes in temperature than concentration. The partition coefficient increases ˜40-fold for pyrene compared to ˜2-fold for BHT when the temperature is increased from 25 to 37°C. CMT values determined using the BHT fluorescence decrease with increasing F127 concentration. Our results show that BHT can be used as a reliable marker of changes in the microenvironment of Pluronic F127.
History
Publication status
- Published
Journal
Journal of colloid and interface scienceISSN
1095-7103Publisher
ElsevierExternal DOI
Issue
2Volume
354Page range
662-669Department affiliated with
- Chemistry Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-10-29Usage metrics
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