A new family of four-ring bent-core nematic liquid crystals with a highly polar end-group

被引：19
作者：
Gude, Venkatesh [1 ]
Upadhyaya, Kalpana [1 ]
Mohiuddin, Golam [1 ]
Nandiraju, V. S. Rao [1 ]
机构：
[1] Assam Univ, Dept Chem, Silchar, Assam, India
来源：
LIQUID CRYSTALS | 2013年 / 40卷 / 01期
关键词：
liquid crystals; cyanobiphenyl; bent-core; nematic phase; DFT calculations; MESOMORPHIC BEHAVIOR; HOMOLOGOUS SERIES; SMECTIC PHASE; BANANA PHASE; MESOGENS; MESOPHASE; CHIRALITY; SUBSTITUENTS; TRANSITION; DIRECTION;
D O I：
10.1080/02678292.2012.744476
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A new family of four-ring achiral bent-core compounds derived from 2-methyl 3-amino benzoic acid with the methyl group in the bent direction incorporated into the central core have been designed and synthesised. These compounds possess an alkoxy chain attached at only one end of the bent core molecule, while the other arm consists of a biphenyl moiety possessing a highly polar cyano-group. The molecular structure has been confirmed by elemental analysis and spectroscopic data, and the thermal behaviour and phase characterisation has been investigated by differential scanning calorimetry and polarising microscopy. All the compounds exhibit a wide-range enantiotropic nematic phase. A comparison with non-mesomorphic unsubstituted and 4-methyl-substituted homologues is also presented.
引用
收藏
页码：120 / 129
页数：10
相关论文
共 77 条
[1]   MESOMORPHIC BEHAVIOR OF 1,3-PHENYLENE BIS[4-(4-ALKOXYPHENYLIMINOMETHYL)BENZOATES] AND RELATED-COMPOUNDS [J].
AKUTAGAWA, T ;
MATSUNAGA, Y ;
YASUHARA, K .
LIQUID CRYSTALS, 1994, 17 (05) :659-666
[2]  
[Anonymous], 1990, Energy Density Functional Theory of Many -Electron Systems
[3]  
Avci N, 2012, SOFT MATTER IN PRESS
[4]   On the way to polar achiral liquid crystals [J].
Blinov, LM .
LIQUID CRYSTALS, 1998, 24 (01) :143-152
[5]   Antiferroelectric behaviour of achiral mesogenic polymer mixtures [J].
Bustamante, EAS ;
Yablonskii, SV ;
Ostrovskii, BI ;
Beresnev, LA ;
Blinov, LM ;
Haase, W .
LIQUID CRYSTALS, 1996, 21 (06) :829-839
[6]  
Dantlgraber G, 2002, ANGEW CHEM INT EDIT, V41, P2408, DOI 10.1002/1521-3773(20020703)41:13<2408::AID-ANIE2408>3.0.CO
[7]  
2-M
[8]   Four-ring achiral unsymmetrical bent core molecules forming strongly fluorescent smectic liquid crystals with spontaneous polar and chiral ordered B7 and B1 phases [J].
Deb, Rajdeep ;
Nath, Rahul Kanti ;
Paul, Manoj Kumar ;
Rao, Nandiraju V. S. ;
Tuluri, Francis ;
Shen, Yongqiang ;
Shao, Renfan ;
Chen, Dong ;
Zhu, Chenhui ;
Smalyukh, Ivan I. ;
Clark, Noel A. .
JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (35) :7332-7336
[9]   A helical liquid-crystal phase generated by a chiral ester with a bent-core molecular architecture [J].
Fergusson, Kenneth M. ;
Hird, Michael .
ADVANCED MATERIALS, 2007, 19 (02) :211-214
[10]   The dramatic influence of the location of bend and of lateral fluoro substitution on the mesomorphic properties of angular chiral esters based on a 1,3-disubstituted benzene ring [J].
Fergusson, Kenneth M. ;
Hird, Michael .
JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (15) :3069-3078
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