Odd-Carbon Alkyl-Substituent Effect on Liquid Crystalline Properties of Discotic Hexa-Peri-Hexabenzocoronene Molecule

Xu Ying Liu; Yu Jiang; Wen Guang Wang; Jia Ling Pu

doi:10.4028/www.scientific.net/AMR.239-242.3358

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 239-242Odd-Carbon Alkyl-Substituent Effect on Liquid...

Odd-Carbon Alkyl-Substituent Effect on Liquid Crystalline Properties of Discotic Hexa-Peri-Hexabenzocoronene Molecule

Abstract:

Hexa-peri-Hexabenzocoronene (HBC), as the smaller graphene fragment consisting of 13 fused benzene rings, possesses a strong tendency to stack together via π-electronic interaction. In this paper, the 1,2-(4-bromomethyl-1-yl) acetylene was alkylated by Grignard reagent to form corresponding 1,2-bis(p-pentadecanylphenyl)acetylene. Cobalt(0)-catalyzed cyclotrimerization was carried out to give hexaphenylbenzene analogue. This step was followed by intramolecular cyclodehydrogenation to yield the desired product HBC-C₁₅. The identity and purity of the new compound was confirmed by UV-vis spectrometer and¹H NMR spectrum. Its thermal behavior and self-assembly were studied by differential scanning calorimetry and polarizing optical microscopy.

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Periodical:

Advanced Materials Research (Volumes 239-242)

Pages:

3358-3361

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.239-242.3358

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Online since:

May 2011

Authors:

Xu Ying Liu, Yu Jiang, Wen Guang Wang, Jia Ling Pu

Keywords:

Discotic Liquid Crystals, Hexa-Peri-Hexabenzocoronene (HBC), Odd-Carbon Alkyl- Substituent

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