Rotational Dynamics of Spin-Labeled Polyacid Chain Segments in Polyelectrolyte Complexes Studied by CW EPR Spectroscopy
作者： Uwe Lappan , Brigitte Wiesner , Ulrich Scheler
DOI: 10.1021/ACS.MACROMOL.5B00474
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摘要: A nitroxide spin label has been covalently linked to the weak polyacid poly(ethylene-alt-maleic acid) (P(E-alt-MA)) study rotational mobility of backbone in polyelectrolyte complexes (PEC) formed with oppositely charged strong polycation poly(diallyldimethylammonium chloride) (PDADMAC) dependence on pH dispersion and temperature. The chain segments determined by simulation line shape continuous wave (CW) electron paramagnetic resonance (EPR) spectra using microscopic order/macroscopic disorder (MOMD) model restricted diffusion. shown that diffusion coefficient characterizing motions is significantly smaller at low degree dissociation 4 than high 7 10.
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