Stimuli-Responsive Supramolecular Chirality Switching and Nanoassembly Constructed by n-Shaped Amphiphilic Molecules in Aqueous Solution
| Autor: | Yuntian Yang, Shengsheng Yu, Zhegang Huang, Yi-rong Pei, Qingqing Han, Long Yi Jin |
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| Rok vydání: | 2021 |
| Předmět: |
Supramolecular chirality
Anthracene Aqueous solution 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Nanomaterials chemistry.chemical_compound Nanocages Azobenzene chemistry Polymer chemistry Amphiphile Electrochemistry Molecule General Materials Science 0210 nano-technology Spectroscopy |
| Zdroj: | Langmuir. 37:1215-1224 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | Self-assembled nanomaterials composed of amphiphilic oligomers with functional groups have been applied in the fields of biomimetic chemistry and on-demand delivery systems. Herein, we report the assembly behavior and unique properties of an emergent n-shaped rod-coil molecule containing an azobenzene (AZO) group upon application of an external stimulus (thermal, UV light). The n-shaped amphiphilic molecules comprising an aromatic segment based on anthracene, phenyl linked with azobenzene groups, and hydrophilic oligoether (chiral) segments self-assemble into large strip-like sheets and perforated-nanocage fragments in an aqueous environment, depending on the flexible oligoether chains. Interestingly, the nano-objects formed in aqueous solution undergo a morphological transition from sheets and nanocages to small one-dimensional nanofibers. These molecules exhibit reversible photo- and thermal-responsiveness, accompanied by a change in the supramolecular chirality caused by the conformational transitions of the rod backbone. The architecture of n-shaped amphiphilic molecules with a photosensitive group makes them ideal candidates for intelligent materials for applications in advanced materials science. |
| Databáze: | OpenAIRE |
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