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含多个对苯撑作为刚棒,齐聚烷基或烷氧基作为柔性链的刚棒-线团(rod-coil)分子,由于具有很强的微相分离和π-π堆积作用,可以在本体和溶液中产生有效的自组装。研究表明,刚棒嵌段的形状影响着分子排列的方式、自组装性能和微结构,因此本文设计了n型芳香嵌段、柔性链全部为烷基的n型刚棒-线团分子,通过红外光谱、NMR和MALDI-TOF-MS对其结构进行了表征,利用DSC、POM和SAXS对此化合物的自组装行为进行了研究。结果表明,含烷基柔性链的n型分子在固态时能形成双分子的层状结构。 相似文献
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Qilong Zhou Ting Chen Jintao Zhang Lijun Wan Charles C. Han Rongben Zhang 《Tetrahedron letters》2008,49(38):5522-5526
As water is gradually added, a p-terphenyl derivative with dumbbell-like amphiphilic and rod-coil characteristics can hierarchically self-assemble to metastable rectangle columns architecting sheets first and then to stable quasi-hexagonal columns architecting rolled sheets, and finally to rod-like nanostructures in MeOH/H2O solution. Interestingly, the formed sheet, rolled sheet, and nanorod possess blue-light emitting property. 相似文献
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We investigate the surface ordering and orientation of a synthetic rigid-flexible block molecule containing a rigid penta-p-phenylene and poly(propylene oxide) flexible chains at the air–water interface. This supramolecular amphiphile self-organizes into a honeycomb-like structure in the bulk, but it behaves differently with the conventional amphiphilies at the air–water interface. Surface pressure–area isotherms, TEM and AFM results show that the rod-coil molecule forms a stable monolayer at the air–water surface. After monolayer collapses, the molecule exhibits island morphology with the (10) layer spacing of 18 nm. From these results, we discuss the self-assembling mechanism of microphase separation between the rigid moiety and the flexible segments on the water subphase. 相似文献