Zobrazeno 1 - 10
of 180
pro vyhledávání: '"and David A. Dunmur"'
Autor:
Wolfgang Haase
Publikováno v:
Journal of Applied Crystallography. 38:579-579
Autor:
Beatriz, Robles-Hernández, Nerea, Sebastián, M Rosario, de la Fuente, David O, López, Sergio, Diez-Berart, Josep, Salud, M Blanca, Ros, David A, Dunmur, Geoffrey R, Luckhurst, Bakir A, Timimi
Publikováno v:
Physical review. E, Statistical, nonlinear, and soft matter physics. 92(6)
The nature of the nematic-nematic phase transition in the liquid crystal dimer 1″,9″-bis(4-cyanobiphenyl-4'-yl) nonane (CB9CB) has been investigated using techniques of calorimetry, dynamic dielectric response measurements, and (2)H NMR spectrosc
Publikováno v:
Tetrahedron. 59:4377-4381
Cycloalkenones are shown to be mesogens and can be synthesised in near quantitative yields by a convergent palladium(0)-catalysed cross-coupling strategy; a 2-methyl group induces a change of phase from smectic to nematic.
Publikováno v:
Liquid Crystals. 23:193-203
In this paper the director configurations and the free energies of a nematic droplet with a surface normal anchoring condition are calculated numerically. For this surface anchoring, a transition occurs between the radial and axial structures with re
Publikováno v:
Journal of Materials Chemistry. 7:391-401
A new approach to the synthesis of azulene liquid crystals is described based on Hafner’s procedure involving reaction of a pyridinium salt with a cyclopentadienide. The preparation of a variety of liquid crystalline materials using this method is
Publikováno v:
Liquid Crystals. 20:815-823
This paper reports the synthesis of six chiral liquid crystalline 2- or 3-substituted-alkyl 4-(4′-dodecyloxybiphenyl-4-carbonyloxy)benzoates, their mesophase assignments and the phase transition temperatures. All six materials display S∗A followe
Publikováno v:
Liquid Crystals. 20:387-392
Achiral ‘swallow-tailed’ liquid crystalline materials are known to give alternating-tilt smectic C phases (SCalt) which have structural similarities to the chiral antiferroelectric phases denoted as S∗CA. This paper describes the synthesis and
Autor:
Yury G. Galyametdinov, Duncan W. Bruce, David A. Dunmur, Daniel Guillon, I. G. Bikchantaev, Benoît Heinrich, Igor V. Ovchinnikov, Olga Kharitonova
Publikováno v:
Liquid Crystals. 20:489-492
Reaction of β-enaminoketones with lanthanide salts leads to mesomorphic complexes displaying an SA mesophase. The mesophase was characterized using X-ray scattering, EPR and magnetic susceptibility. A very high magnetic anisotropy was deduced for a
Publikováno v:
J. Mater. Chem.. 6:919-926
The synthesis of the novel chiral mesogen (R)-(–)-nonan-3-yl 4-(4′-dodecyloxybiphenyl-4-ylcarbonyloxy)-3-fluorobenzoate and a discussion of its various liquid-crystalline properties are reported. Initial optical microscopy studies revealed the pr
Publikováno v:
The Journal of Physical Chemistry. 100:307-315
This paper describes an experimental investigation of dipole−dipole interactions between molecules in an orientationally ordered environment. Measurements are reported of the dielectric properties of a series of anisotropic solutions of two structu