Liquid Crystalline Phase Transition in Organophosphazenes with 4-Octyloxybiphenyl Mesogenic Groups

• Keiichi Moriya

  Department of Chemistry, Faculty of Engineering, Gifu University

• Toshiya Suzuki

  Department of Chemistry, Faculty of Engineering, Gifu University

• Hiroshi Mizusaki

  Department of Chemistry, Faculty of Engineering, Gifu University

• Shinichi Yano

  Department of Chemistry, Faculty of Engineering, Gifu University

• Meisetsu Kajiwara

  Department of Applied Chemistry, School of Engineering, Nagoya University

抄録

Cyclotriphosphazenes with the same 4-octyloxybiphenyl mesogenic side groups have been synthesized and were studied their phase transition and liquid crystallinity using DSC measurements and polarizing microscope observations. We found an enantiotropic smectic C phase in hexakis(4-(4′-octyloxy)biphenoxy)cyclotriphosphazene but no liquid crystalline phase was observed in octakis(4-(4′-octyloxy)biphenoxy)cyclotetraphosphazene. These may originate from each of the three side chains of the cyclotriphosphazene molecules pointed upwards and downwards perpendicularly from the cyclotriphosphazene ring, which helps the formation of the liquid crystalline layer structure. However, in the cyclotetraphosphazene, the eight side chains orient relatively at random and this prevents the formation of the mesogenic layer structure.

収録刊行物

• Chemistry Letters

  Chemistry Letters 26 (10), 1001-1002, 1997-10-01

  Oxford University Press (OUP)

キーワード

• General Chemistry

詳細情報

• CRID: 1360002219109272064
• NII論文ID: 10002615635
• NII書誌ID: AA00603318
• DOI: 10.1246/cl.1997.1001
• ISSN: 13480715
• ISSN: 03667022
• Web Site: https://academic.oup.com/chemlett/article-pdf/26/10/1001/56073977/cl.1997.1001.pdf
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