標題: Star Poly(N-isopropylacrylamide) Tethered to Polyhedral Oligomeric Silsesquioxane (POSS) Nanoparticles by a Combination of ATRP and Click Chemistry
作者: Kuo, Shiao-Wei
Hong, Jing-Long
Huang, Yu-Chan
Chen, Jem-Kun
Fan, Shih-Kang
Ko, Fu-Hsiang
Chu, Chih-Wei
Chang, Feng-Chih
應用化學系
Department of Applied Chemistry
公開日期: 2012
摘要: New star poly(N-isopropylacrylamide)-b-polyhedral oligomeric silsesquioxane (PNIPAm-b-POSS) copolymers were synthesized from octa-azido functionalized POSS (N-3-POSS) and alkyne-PNIPAm, which was prepared using an alkyne-functionalized atom transfer radical polymerization (ATRP) initiator (propargyl 2-bromo-2-methylpropionamide), via click chemistry. These star PNIPAm-b-POSS copolymers undergo a sharp coil-globule transition in water at above 32 degrees C changing from a hydrophilic state below this temperature to a hydrophobic state above it, which is similar to linear PNIPAm homopolymers. More interestingly, we found that these star polymers exhibited strong blue photoluminescence in water above a lower critical solution temperature (LCST). This photoluminescence was likely due to the constrained geometric freedom and relatively rigid structure caused by intramolecular hydrogen bonding within the star PNIPAm polymers, which exhibit an intrinsic fluorescent behavior.
URI: http://hdl.handle.net/11536/16560
http://dx.doi.org/749732
ISSN: 1687-4110
DOI: 749732
期刊: JOURNAL OF NANOMATERIALS
顯示於類別:期刊論文


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