Synthesis, Crystal Structure of Novel Symmetrical Diphenylnate Liq-uid Crystal

Chin. J. Org. Chem. ›› 2011, Vol. 31 ›› Issue (05): 677-683. Previous Articles Next Articles

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新型对称联苯双酯类液晶材料的合成和晶体结构

陈卫东¹，刘勇¹，张鹏云*^{,2，张有明¹，魏太保*^,1}

(¹西北师范大学化学化工学院生态环境相关高分子材料教育部重点实验室兰州 730070)
(²甘肃省化工研究院兰州 730020)

收稿日期:2010-07-14 修回日期:2010-10-29 发布日期:2010-12-20
通讯作者: 魏太保 E-mail:weitaibao@126.com

Synthesis, Crystal Structure of Novel Symmetrical Diphenylnate Liq-uid Crystal

Chen Weidong¹ Liu Yong¹ Zhang Pen-gyun*^{,2 Zhang Youming¹ Wei Taibao*^,1}

(¹ Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070)
(²Gansu Research Institute of Chemical Industry, Lanzhou 730020)

Received:2010-07-14 Revised:2010-10-29 Published:2010-12-20

Four symmetrical diphenylnate liquid crystals were prepared and their structures were confirmed by FT-IR and ¹H NMR spectra. Their liquid crystal properties were tested by differential scanning calo-rimetry (DSC), X-ray diffraction (XRD) and hot stage polarizing microscop (POM). The crystal structure of IIIa was detemfined by X-ray single crystal diffraction techniques. IIIa is a monoclinic crystal system, space group P2₁/c with the unit cell parameters: a＝18.525(3) Å, b＝12.196(2) Å, c＝12.195(2) Å, β＝97.142(2)°, V＝2733.7(9) Å³, Z＝4, D_c＝1.163 Mg/m³, R＝0.0521, R_w＝0.1161. The results showed that molecules lead thermotropic liquid crystals properties. The relations among the mesomorphism, oxygen atoms, terminal unsaturated bond, the flexible chain length were investigated.

Key words: diphenylnate liquid crystal, texture, thermotropic liquid crystal, crystal structure

Cite this article

CHEN Wei-Dong, LIU Yong, ZHANG Peng-Yun, ZHANG You-Ming, WEI Tai-Bao. Synthesis, Crystal Structure of Novel Symmetrical Diphenylnate Liq-uid Crystal[J]. Chin. J. Org. Chem., 2011, 31(05): 677-683.

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新型对称联苯双酯类液晶材料的合成和晶体结构

Synthesis, Crystal Structure of Novel Symmetrical Diphenylnate Liq-uid Crystal

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