Interactions between macromolecules in aqueous environments are the fundamental driving force behind not only a multitude of materials engineering processes, but also behind biology as a whole. While these interactions are mediated by both molecular dynamics and translational diffusion rates of interfacial water, experimental attempts to quantify these parameters have historically been inaccurate or unfeasible. Presented is a novel magnetic resonance approach to measuring dynamics in aqueous macromolecular systems. Here, electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) spectroscopies are united into a powerful technique termed, dynamic nuclear polarization enhanced nuclear magnetic resonance spectroscopy (DNP). This technique is implemented to characterize the internal structure of complex coacervates inspired by biological aqueous adhesives, and to probe coacervate-based triblock copolymer hydrogels with domain specificity. In addition, the role of intermolecular associations in aqueous π-conjugated oligoelectrolytes is examined with advanced analysis tools.
|Commitee:||Hawker, Craig J., Kramer, Edward J., Waite, J. Herbert|
|School:||University of California, Santa Barbara|
|School Location:||United States -- California|
|Source:||DAI-B 72/12, Dissertation Abstracts International|
|Subjects:||Physical chemistry, Materials science|
|Keywords:||Complex coacervation, Dynamic nuclear polarization, Hydration dynamics, Hydrogels, Self-assembly, Supramolecular assemblies|
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