標題: Supramolecular structures of uracil-functionalized PEG with multi-diamidopyridine POSS through complementary hydrogen bonding interactions
作者: Wang, Jui-Hsu
Altukhov, Oleksii
Cheng, Chih-Chia
Chang, Feng-Chih
Kuo, Shiao-Wei
應用化學系
Department of Applied Chemistry
公開日期: 2013
摘要: In this study, we synthesized (i) a multi-diamidopyridine-functionalized polyhedral oligomeric silsesquioxane (MD-POSS) through nucleophilic substitution and click 1,3-cycloaddition reactions and (ii) both mono- and bis-uracil (U)-functionalized poly(ethylene glycol) derivatives (U-PEG and U-PEG-U, respectively) through Michael additions of U to acryloyl-functionalized PEG oligomers. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) revealed that supramolecular structures self-assembled from mixtures of MD-POSS and U-PEG and from MD-POSS and U-PEG-U. Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopy confirmed the presence of multiple hydrogen bonding interactions between the diaminopyridine groups of MD-POSS and the U groups of U-PEG and U-PEG-U. Because of these strong reversible intermolecular multiple hydrogen bonds, the POSS-based polymer-like supramolecular materials exhibited improved thermal properties upon increasing the MD-POSS content.
URI: http://hdl.handle.net/11536/21959
http://dx.doi.org/10.1039/c3sm27968e
ISSN: 1744-683X
DOI: 10.1039/c3sm27968e
期刊: SOFT MATTER
Volume: 9
Issue: 21
起始頁: 5196
結束頁: 5206
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