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90Plus測量應用案例-2016-41

閱讀:237          發布時間:2016-8-29

文獻名: Superstructure Formation and Topological Evolution Achieved by Self-Organization of a Highly Adaptive Dynamer

 

作者 Pengyao Xing, Hongzhong Chen, Linyi Bai, Aiyou Hao, and Yanli Zhao‡§

 Key Laboratory of Colloid and Interface Chemistry of Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China

 Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore

§ School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore

 

 

摘要:The adaptive property of supramolecular building blocks facilitates noncovalent synthesis of soft materials. While it is still a challenging task, fine-tuning and precise control over topological nanostructures constructed from the self-assembly of low-molecular-weight building blocks are an important research direction to investigate the structure–property relationship. Herein, we report controlled self-assembly evolution of a low-molecular-weight building block bearing cholesterol and naphthalene-dicarboximide moieties, showing ultrasensitivity to solvent polarity. In low-polarity solvents (<4), it could form an M-type fiber-constituted organogel (supergel) with high solvent content, columnar molecular packing, and self-healing property. Highly polar solvents (>7.8) favor the formation of P-type helical nanostructures terminated by nanotoroids, having lamellar molecular packing. With a further increase in solvent polarity (up to 9.6), unilamellar and multilamellar vesicles were generated, which could undergo an aggregation-induced fusion process to form branched nanotubes tuned by the concentration. Self-attractive interactions between aggregates were found to be responsible for the formation of superstructures including helix–nanotoroid junctions as well as membrane-fused nanotubes.

 

關鍵詞:adaptive dynamer; morphological evolution; self-assembly; superstructures; vesicles

 

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