Hydrogen-Bonded Multifunctional Supramolecular Copolymers in Water

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• 作者：Yunjie Xiang ; Emilie Moulin ; Eric Buhler ; Mounir Maaloum ; Gad Fuks ; Nicolas Giuseppone
• 刊名：Langmuir
• 出版年：2015
• 出版时间：July 21, 2015
• 年：2015
• 卷：31
• 期：28
• 页码：7738-7748
• 全文大小：806K
• ISSN：1520-5827

文摘

We have investigated the self-assembly in water of molecules having a single hydrophobic bis-urea domain linked to different hydrophilic functional side chains, i.e., bioactive peptidic residues and fluorescent cyanine dyes. By using a combination of spectroscopy, scattering, and microscopy techniques, we show that each one of these molecules can individually produce well-defined nanostructures such as twisted ribbons, two-dimensional plates, or branched fibers. Interestingly, when these monomers of different functionalities are mixed in an equimolar ratio, supramolecular copolymers are preferred to narcissistic segregation. Radiation scattering and imaging techniques demonstrate that one of the molecular units dictates the formation of a preferential nanostructure, and optical spectroscopies reveal the alternated nature of the copolymerization process. This work illustrates how social self-sorting in H-bond supramolecular polymers can give straightforward access to multifunctional supramolecular copolymers.