https://scholars.lib.ntu.edu.tw/handle/123456789/408389
Title: | Dynamic supramolecular self-assembly hydrogen bonding-induced contraction and extension of functional polymers | Authors: | Cheng C.-C. Wang J.-H. Chuang W.-T. Liao Z.-S. Huang J.-J. Huang S.-Y. Fan W.-L. Lee D.-J. |
Issue Date: | 2017 | Journal Volume: | 8 | Journal Issue: | 21 | Start page/Pages: | 3294-3299 | Source: | Polymer Chemistry | Abstract: | Simple construction and manipulation of low-molecular-weight supramolecular polymers, based on incorporation of self-complementary multiple hydrogen bonding interactions, with the desired dynamic response characteristics to achieve high-efficiency supramolecular assembly and control the morphological properties of the polymers remain highly challenging. Herein, we developed a new difunctional telechelic supramolecular polymer (UrCy-PPG) containing self-complementary quadruple hydrogen-bonded ureido-cytosine (UrCy) moieties, which spontaneously self-assembles to form long-range-ordered lamellar structures in the bulk state. Scattering and rheological studies confirmed that the dynamic behavior of UrCy units induces structural phase transitions from quadruple to dual hydrogen-bonded arrays, leading to well-controlled, self-organized supramolecular nanostructure morphologies. The microstructural features could be easily tuned by altering environmental conditions, making the self-assembly processes highly efficient. Importantly, temperature/shear stress-dependent microstructural analyses indicated that UrCy-PPG has the capacity to manipulate the transition between contractile and fully extended lamellar structures. Given its novelty, simple synthesis, high reliability, and efficient self-assembly processes, this newly developed supramolecular polymer represents a new concept and pathway for controlled arrangement of self-assembled polymeric nanostructures. This journal is ? The Royal Society of Chemistry. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408389 | ISSN: | 17599954 | DOI: | 10.1039/c7py00684e |
Appears in Collections: | 化學工程學系 |
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