Reversible switching between hydrophilic and hydrophobic superparamagnetic iron oxide microspheres via one-step supramolecular dynamic dendronization: exploration of dynamic wettability.
作者： Ken Cham-Fai Leung , Shouhu Xuan , Chui-Man Lo
DOI: 10.1021/AM900367A
关键词:
摘要: We describe the use of hydrophobic poly(aryl ether) dendrons to peripherally functionalize hydrophilic amine-containing superparamagnetic iron oxide microspheres (SPIO-NH2) in one step via imine formation. The reversible formation bonds absence/presence water renders dynamic control hydrophilicity and hydrophobicity (SPIO-Gn). nature imine-containing dendronized (SPIO-Gn) can be “fixed” by locking 2,6-diiminopyridyl moieties with metal cations (Zn2+, Co2+, Ni2+) afford kinetically stable (SPIO-Gn-M). Isolation these is facilitated convenient magnetic separation an externally applied field. Characterization novel organic−inorganic hybrid has been performed various techniques using UV/visible absorption Fourier transform infrared spectroscopies, transmission electron microscopy, thermogravimetric analysis, a vibrating sam...
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