Liquid crystalline dimers with bent-core mesogenic units

被引:23
作者
Achten, Remko
Koudijs, Arie
Giesbers, Marcel
Marcelis, Antonius T. M.
Sudhoelter, Ernst J. R.
Schroeder, Martin W.
Weissflog, Wolfgang
机构
[1] Univ Wageningen & Res Ctr, Organ Chem Lab, NL-6703 HB Wageningen, Netherlands
[2] Univ Halle Wittenberg, Inst Chem Phys, D-06108 Halle, Germany
关键词
D O I
10.1080/02678290601061330
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Two series of dimers, in which two identical aromatic bent core mesogenic units are connected via an organosiloxane or an alkylene spacer, have been investigated. The dimers with a spacer consisting of a trisiloxane central group and relatively long alkylene groups show an intercalated tilted smectic structure. The layer spacings appear to be very weakly dependent on the terminal chain lengths. In these dimers the smectic phase is stabilized for the compounds with a short terminal chain. Dimers with an aliphatic alkylene spacer are liquid crystalline only when the spacer is relatively short and the terminal chains are long. For these dimers a monolayer tilted smectic phase is observed.
引用
收藏
页码:59 / 64
页数:6
相关论文
共 23 条
[11]   TRANSITIONS IN LINEAR THERMOTROPIC POLYESTERAMIDES [J].
KHAN, AH ;
MCINTYRE, JE ;
MILBURN, AH .
POLYMER, 1983, 24 (12) :1610-1614
[12]   Liquid-crystalline dimers composed of bent-core mesogenic units [J].
Kosata, B ;
Tamba, GM ;
Baumeister, U ;
Pelz, K ;
Diele, S ;
Pelzl, G ;
Galli, G ;
Samaritani, S ;
Agina, EV ;
Boiko, NI ;
Shibaev, VP ;
Weissflog, W .
CHEMISTRY OF MATERIALS, 2006, 18 (03) :691-701
[13]   Spontaneous formation of macroscopic chiral domains in a fluid smectic phase of achiral molecules [J].
Link, DR ;
Natale, G ;
Shao, R ;
Maclennan, JE ;
Clark, NA ;
Korblova, E ;
Walba, DM .
SCIENCE, 1997, 278 (5345) :1924-1927
[14]   Cholesterol-containing liquid crystal dimers with ether linkages between the spacer and mesogenic units [J].
Marcelis, ATM ;
Koudijs, A ;
Karczmarzyk, Z ;
Sudhölter, EJR .
LIQUID CRYSTALS, 2003, 30 (11) :1357-1364
[15]  
Pelzl G, 1999, ADV MATER, V11, P707, DOI 10.1002/(SICI)1521-4095(199906)11:9<707::AID-ADMA707>3.0.CO
[16]  
2-D
[17]   Bent-core liquid crystals: polar order, superstructural chirality and spontaneous desymmetrisation in soft matter systems [J].
Reddy, RA ;
Tschierske, C .
JOURNAL OF MATERIALS CHEMISTRY, 2006, 16 (10) :907-961
[18]   Novel ferroelectric and antiferroelectric smectic and columnar mesophases in fluorinated symmetrical bent-core compounds [J].
Reddy, RA ;
Raghunathan, VA ;
Sadashiva, BK .
CHEMISTRY OF MATERIALS, 2005, 17 (02) :274-283
[19]   Influence of fluorine substituent on the mesomorphic properties of five-ring ester banana-shaped molecules [J].
Reddy, RA ;
Sadashiva, BK .
LIQUID CRYSTALS, 2003, 30 (09) :1031-1050
[20]   Molecular design of nonchiral bent-core liquid crystals with antiferroelectric properties [J].
Shen, D ;
Pegenau, A ;
Diele, S ;
Wirth, I ;
Tschierske, C .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (08) :1593-1601