Various Columnar Nano-structures from Self-Assembly of Triphenylene Discotic Liquid Crystalline Molecules

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (12): 2777.

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Various Columnar Nano-structures from Self-Assembly of Triphenylene Discotic Liquid Crystalline Molecules

YANG Chun-Chang¹, CHEN Li¹, ZHONG Ke-Li¹, CHEN Tie^1,2, JIN Long-Yi^1*

1. Key Laboratory for Natural Resources of the Changbai Mountain and Functional Molecules, Ministry of Education, Yanbian University, Yanji 133002, China;
2. State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China

Received:2011-01-21 Revised:2011-04-08 Online:2011-12-10 Published:2011-11-25
Contact: JIN Long-Yi E-mail:lyjin@ybu.edu.cn
Supported by:
南开大学元素有机化学国家重点实验室开放课题(批准号: 201002)和吉林省自然科学基金(批准号: 201115225)资助.

Abstract

Abstract: Discotic liquid crystalline molecules, consisting of a flexible alkyl chain and a rigid block, have a strong ability to self-assemble into a variety of columnar nanostructures in the liquid crystalline phase. In this paper, we report the synthesis and characterization of the self-assembly behavior of the three kinds of triphenylene discotic liquid crystalline molecules with various lengths of alkyl chains. Structural study of these moleculses by means of differential scanning calorimetry(DSC), polarizing optical microscopy(POM) and X-ray diffraction(XRD) revealed that the lengths of alkyl chains of triphenylene discotic liquid crystalline mo-lecules was strongly influenced the self assembly behavior in the liquid crystalline phase. The molecules containing octyl chains or dodecanyl chains self-assembled into 2D hexagonal columnar structure or 2D oblique columnar structure, respectively, in the liquid crystalline phase. While, the molecule containing hexadecyl chains did not construct ordered columnar nanostructure in the bulk state.

Key words: Triphenylene discotic liquid crystalline, Self-assemble, Columnar phase, X-ray scattering

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YANG Chun-Chang, CHEN Li, ZHONG Ke-Li, CHEN Tie, JIN Long-Yi*. Various Columnar Nano-structures from Self-Assembly of Triphenylene Discotic Liquid Crystalline Molecules[J]. Chem. J. Chinese Universities, 2011, 32(12): 2777.

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Various Columnar Nano-structures from Self-Assembly of Triphenylene Discotic Liquid Crystalline Molecules

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