引用本文:
Rui Bao, Min Pan, Jin Jun Qiu, Cheng Mei Liu. Synthesis and characterization of six-arm star-shaped liquid crystalline cyclotriphosphazenes[J]. Chinese Chemical Letters,
2010, 21(6): 682-685.
doi:
10.1016/j.cclet.2009.12.020
Citation: Rui Bao, Min Pan, Jin Jun Qiu, Cheng Mei Liu. Synthesis and characterization of six-arm star-shaped liquid crystalline cyclotriphosphazenes[J]. Chinese Chemical Letters, 2010, 21(6): 682-685. doi: 10.1016/j.cclet.2009.12.020
Citation: Rui Bao, Min Pan, Jin Jun Qiu, Cheng Mei Liu. Synthesis and characterization of six-arm star-shaped liquid crystalline cyclotriphosphazenes[J]. Chinese Chemical Letters, 2010, 21(6): 682-685. doi: 10.1016/j.cclet.2009.12.020
Synthesis and characterization of six-arm star-shaped liquid crystalline cyclotriphosphazenes
摘要:
The synthesis and mesomorphic properties of a new class of liquid crystalline cyclotriphosphazenes with rigid cyanostilbene groups and flexible alkoxy groups are reported. The thermal behaviors of cyclotriphosphazene derivatives 5a-5d are studied by the means of differential scanning calorimetry, polarizing optical microscopy. Nematic phases were observed in compounds 5a-5d both on heating and cooling. The clear temperatures of compounds 5a-5d slightly increased with increasing length of terminal alkyl chain. Compounds 5a-5d showed different mesogenic region from minimum 5℃ to maximum 142℃.
English
Synthesis and characterization of six-arm star-shaped liquid crystalline cyclotriphosphazenes
Abstract:
The synthesis and mesomorphic properties of a new class of liquid crystalline cyclotriphosphazenes with rigid cyanostilbene groups and flexible alkoxy groups are reported. The thermal behaviors of cyclotriphosphazene derivatives 5a-5d are studied by the means of differential scanning calorimetry, polarizing optical microscopy. Nematic phases were observed in compounds 5a-5d both on heating and cooling. The clear temperatures of compounds 5a-5d slightly increased with increasing length of terminal alkyl chain. Compounds 5a-5d showed different mesogenic region from minimum 5℃ to maximum 142℃.
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Key words:
- Cyclotriphosphazene
- / Cyanostilbene
- / Liquid crystal
- / Star-shaped molecule
- / Synthesis
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