Salt- and Temperature-dependent Simple Coacervation of Polyether-based Polyguanidinium
발표자
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초록
내용
Simple coacervation is a liquid-liquid phase separation (LLPS) of a single polyelectrolyte solution by adding salts, which are frequently observed in biomolecule condensation such as arginine-rich protamine. The intermolecular interactions including π-π interaction cause the LLPS. In this work, we reported that salt- and temperature-induced simple coacervation of polyether-based polyguanidinium occurs by π-staking of like-charged guanidinium (Gdm) pairs. Gdm functionalized poly(allyl glycidyl ether)s (G-PAGEs) was synthesized by anionic ring opening polymerization and post-modification. Phase transition temperature (Tc) of the G-PAGE solutions was characterized as function of added salt concentration (Csalt) by transmittance. We observed that the G-PAGE solution shows upper critical solution temperature (UCST) within 0 ~ 100 ºC temperature range, and the Tc was modulated by the Csalt. As the results, the Tc increases as increasing Csalt, according to reversed Hofmeister series.