Self-Organization of Polymerizable Bolaamphiphiles Bearing Diacetylene Mesogenic Group

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• 作者：Shouchun Yin ; Bo Song ; Guanqing Liu ; Zhiqiang Wang ; Xi Zhang
• 刊名：Langmuir
• 出版年：2007
• 出版时间：May 22, 2007
• 年：2007
• 卷：23
• 期：11
• 页码：5936 - 5941
• 全文大小：345K
• 年卷期：v.23,no.11(May 22, 2007)
• ISSN：1520-5827

文摘

We report herein the synthesis of a series of polymerizable bolaamphiphiles containing a diacetylene group andmesogenic unit and their self-organization behaviors in bulk and at interface. The polymerizable bolaamphiphiles arenoted as DPDA-n, where n refers to the spacer length of alkyl chain. DPDA-10 with suitable spacer length canself-organize into stable cylindrical micellar nanostructures, and these nanostructures have preferred orientation regionallywhen adsorbed at the mica/water interface. It is confirmed that the micellar nanostructure of DPDA-10 can be polymerizedboth in the bulk solution and in the film by UV irradiation. The emission property of DPDA-10 after UV irradiationhas been significantly enhanced in comparison to that before polymerization, which may be due to the extension ofthe conjugated system arising from the transformation of the diacetylene group into polydiacetylene upon polymerization.In addition, the self-organization of DPDA-n is dependent on the spacer length. DPDA-7 with a short spacer lengthforms an irregular flat sheet structure with many defects; DPDA-15 with a long spacer length forms rodlike micellarstructures. Thus, this work may provide a new approach for designing and fabricating organic functional nanostructuredmaterials.