Synthesis and self-assembly of comb oligomers having rigid racemic or chiral binaphthyl macrocyclic pendant groups |
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Authors: | Na Liu E. Jin Wanjin Zhang Yen Wei |
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Affiliation: | a Alan G. MacDiarmid Institute of Jilin University, Changchun 130012, People's Republic of China b Department of Chemistry, Drexel University, Philadelphia, PA 19104, USA |
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Abstract: | In this article, we described the synthesis of comb oligomers having rigid racemic or chiral binaphthyl macrocyclic pendant groups via the free radical polymerization. Oligomers obtained were well characterized by MALDI-TOF-MS, 1H NMR, FT-IR, UV, CD and SEC. These comb oligomers having macrocyclic pendant groups showed very good solubility in common organic solvents at room temperature. Furthermore, the oligomers could self-assemble into different morphologies by dropping their THF solutions of different concentrations on the surface of water. At a relatively low concentration, the oligomers self-aggregated into hollow spheres. When the concentration was increased, the aggregates changed into solid spheres. The morphologies of the hollow or solid spheres were observed by TEM and ESEM. |
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Keywords: | Chiral Comb oligomers Self-assemble |
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