Synthesis and characterisation of an unsymmetrical, ether-linked, fluorinated bimesogen exhibiting a new polymorphism containing the NTB or 'twist-bend' phase

被引：91

作者：

Mandle, R. J. ^{[1
]}

Davis, E. J. ^{[1
]}

Lobato, S. A. ^{[1
]}

Vol, C. -C. A. ^{[1
]}

Cowling, S. J. ^{[1
]}

Goodby, J. W. ^{[1
]}

机构：

[1] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 15期

基金：

英国工程与自然科学研究理事会;

关键词：

LIQUID-CRYSTAL;

D O I：

10.1039/c4cp00172a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this article we report on the liquid crystal phases and properties of the bimesogen 4-((11-((40-fluoro[1,10-biphenyl]-4-yl)oxy)undecyl)oxy)-2,3-difluoro-40-(4-propylcyclohexyl)-1,10-biphenyl. This material was shown to exhibit an Iso Liq-N-N-TB-SmA phase sequence, thereby clearly indicating that the N-TB phase possesses an ordering of the constituent molecules that is between that of a conventional nematic and the smectic A phase. This compound allows us to better understand the relationship between molecular structure and the NTB phase, and we conclude it is the gross topology that dictates the incidence of this fascinating phase and not molecular properties such as dipole moment and bend angle.

引用

页码：6907 / 6915

页数：9

共 21 条

[1] Chemically induced twist-bend nematic liquid crystals, liquid crystal dimers, and negative elastic constants [J].

Adlem, K. ;

Copic, M. ;

Luckhurst, G. R. ;

Mertelj, A. ;

Parri, O. ;

Richardson, R. M. ;

Snow, B. D. ;

Timimi, B. A. ;

Tuffin, R. P. ;

Wilkes, D. .

PHYSICAL REVIEW E, 2013, 88 (02)

[2] The Chirality of a Twist-Bend Nematic Phase Identified by NMR Spectroscopy [J].

Beguin, Laetitia ;

Emsley, James W. ;

Lelli, Moreno ;

Lesage, Anne ;

Luckhurst, Geoffrey R. ;

Timimi, Bakir A. ;

Zimmermann, Herbert .

JOURNAL OF PHYSICAL CHEMISTRY B, 2012, 116 (27) :7940-7951

[3] Nematic twist-bend phase with nanoscale modulation of molecular orientation [J].

Borshch, V. ;

Kim, Y. -K. ;

Xiang, J. ;

Gao, M. ;

Jakli, A. ;

Panov, V. P. ;

Vij, J. K. ;

Imrie, C. T. ;

Tamba, M. G. ;

Mehl, G. H. ;

Lavrentovich, O. D. .

NATURE COMMUNICATIONS, 2013, 4

[4] Phase behavior and properties of the liquid-crystal dimer 1",7"-bis(4-cyanobiphenyl-4′- yl) heptane: A twist-bend nematic liquid crystal [J].

Cestari, M. ;

Diez-Berart, S. ;

Dunmur, D. A. ;

Ferrarini, A. ;

de la Fuente, M. R. ;

Jackson, D. J. B. ;

Lopez, D. O. ;

Luckhurst, G. R. ;

Perez-Jubindo, M. A. ;

Richardson, R. M. ;

Salud, J. ;

Timimi, B. A. ;

Zimmermann, H. .

PHYSICAL REVIEW E, 2011, 84 (03)

[5] Chiral heliconical ground state of nanoscale pitch in a nematic liquid crystal of achiral molecular dimers [J].

Chen, Dong ;

Porada, Jan H. ;

Hooper, Justin B. ;

Klittnick, Arthur ;

Shen, Yongqiang ;

Tuchband, Michael R. ;

Korblova, Eva ;

Bedrov, Dmitry ;

Walba, David M. ;

Glaser, Matthew A. ;

Maclennan, Joseph E. ;

Clark, Noel A. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2013, 110 (40) :15931-15936

[6]

DAVIS E, UNPUB

[7] On the spontaneous symmetry breaking in the mesophases of achiral banana-shaped molecules [J].

Dozov, I .

EUROPHYSICS LETTERS, 2001, 56 (02) :247-253

[8]

Goodby J. W., 1984, Liquid Crystals and Ordered Fluids. Proceedings of the American Chemical Society Symposium, P89

[9] CHARACTERIZATION OF A NEW HELICAL SMECTIC LIQUID-CRYSTAL [J].

GOODBY, JW ;

WAUGH, MA ;

STEIN, SM ;

CHIN, E ;

PINDAK, R ;

PATEL, JS .

NATURE, 1989, 337 (6206) :449-452

[10]

GOSCIANSKI M, 1975, J PHYS, V36, P231, DOI DOI 10.1051/JPHYSCOL:1975141

← 1 2 3 →