Supramolecular structures of uracil-functionalized PEG with multi-diamidopyridine POSS through complementary hydrogen bonding interactions was written by Wang, Jui-Hsu;Altukhov, Oleksii;Cheng, Chih-Chia;Chang, Feng-Chih;Kuo, Shiao-Wei. And the article was included in Soft Matter in 2013.SDS of cas: 1075-62-3 This article mentions the following:
The authors 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, resp.) through Michael additions of U to acryloyl-functionalized PEG oligomers. TEM and dynamic light scattering (DLS) revealed that supramol. structures self-assembled from mixtures of MD-POSS and U-PEG and from MD-POSS and U-PEG-U. FTIR and NMR spectroscopy confirmed the presence of multiple H 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 intermol. multiple H bonds, the POSS-based polymer-like supramol. materials exhibited improved thermal properties upon increasing the MD-POSS content. In the experiment, the researchers used many compounds, for example, N-(6-Aminopyridin-2-yl)acetamide (cas: 1075-62-3SDS of cas: 1075-62-3).
N-(6-Aminopyridin-2-yl)acetamide (cas: 1075-62-3) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.SDS of cas: 1075-62-3