Hydrogen Bonded Supramolecular Liquid Crystalline Complex of 2,4,6-Triarylamino-1,3,5-triazines with Semiperfluorinated Benzoic Acids

Su Fawu; Cheng Xiaohong

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Hydrogen Bonded Supramolecular Liquid Crystalline Complex of 2,4,6-Triarylamino-1,3,5-triazines with Semiperfluorinated Benzoic Acids

Su Fawu,Cheng Xiaohong * #

Chemistry department, Yunnan University

*Correspondence author

#Submitted by

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Funding: 教育部博士点基金（No.20070673002）

Opened online:18 March 2010

Accepted by: none

Citation: Su Fawu,Cheng Xiaohong.Hydrogen Bonded Supramolecular Liquid Crystalline Complex of 2,4,6-Triarylamino-1,3,5-triazines with Semiperfluorinated Benzoic Acids [OL]. [18 March 2010] http://en.paper.edu.cn/en_releasepaper/content/40838

Hydrogen bonded supramolecular complexes of 2, 4, 6-triarylamino-1, 3, 5-triazines (Tn) with semiperfluorinated benzoic acids have been prepared in this paper. The mesophase behaviors of such complexes were investigated with POM, DSC and X-ray diffraction. Columnar mesophase was found in the equimolar mixtures of the triazines with the semiperfluorinated benzoic acids. While the equimolar mixture of triazines with the nonfluorinated three fold alkoxy-modified carboxylic acid was not mesogen. The mesophase formation is analyzed as the hydrogen bonding between the Tn and benzoic acid lead to discrete dimeric supermolecule and enhance the polarity of the core region of the dimeric supermolecule; simultaneously, an increased intramolecular polarity contrast upon replacing alkyl chains by semiperfluorinated chains, which favors a microsegregation, lead to the fromation of the columnar phase.

Keywords:hydrogenbonding;perfluorinated chains;liquid crystals

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