Reversible transformation between rings and coils in a dynamic hydrogen-bonded self-assembly.
Reversible transformation between rings and coils in a dynamic hydrogen-bonded self-assembly.
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DOI：
10.1021/ja9005892
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发表时间：
2009-03
影响因子：
15
通讯作者：
S. Yagai;S. Kubota;Hikaru Saito;Kanako Unoike;T. Karatsu;Akihide Kitamura;A. Ajayaghosh;M. Kanesato;Y. Kikkawa
中科院分区：
文献类型：
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作者：
S. Yagai;S. Kubota;Hikaru Saito;Kanako Unoike;T. Karatsu;Akihide Kitamura;A. Ajayaghosh;M. Kanesato;Y. Kikkawa
一些蛋白质，如烟草花叶病毒外壳蛋白和噬菌体lambda的β蛋白，已知具有独特的动态自组织过程，涉及化学刺激触发的环状和延长的螺旋纳米结构。然而，在生物组装中观察到的环到线圈的转变从来没有用合成的分子构件实现过。低聚(对苯乙叉)分子一端带有巴比妥酸官能化，另一端带有脂肪族尾巴，在脂肪族溶剂中通过氢键和pi堆积作用自组织形成纳米环。随着浓度的增加，纳米环转变为棒状纳米结构，这种结构被认为是通过由准一维纤维组成的螺旋状物体形成的。
Several proteins, such as tobacco mosaic virus coat protein and the beta protein of the bacteriophage lambda, are known to exhibit unique dynamic self-organization processes involving ring-shaped and extended helical nanostructures triggered by chemical stimuli. However, transformation of rings into coils as observed in biological assemblies has never been realized with synthetic molecular building blocks. Oligo(p-phenylenevinylene) functionalized on one end with barbituric acid and on the other end with aliphatic tails self-organizes in aliphatic solvents to form nanorings through hydrogen-bonding and pi-stacking interactions. Upon an increase in concentration, the nanorings transform into rodlike nanostructures, which are considered to be formed through helically coiled objects consisting of quasi-one-dimensional fibers.