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1 article(s) from Lehmann, Matthias

Low temperature enantiotropic nematic phases from V-shaped, shape-persistent molecules

Matthias Lehmann and
Jens Seltmann

Beilstein J. Org. Chem. 2009, 5, No. 73, doi:10.3762/bjoc.5.73

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Graphical Abstract

Figure 1: Uniaxial nematic (left) and biaxial nematic (right) phases and their corresponding indicatrices.

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Figure 2: Design of V-shaped, shape-persistent oligo(phenylene ethynylene) mesogens of type I and II (R, R′ =...

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Scheme 1: Synthesis of arm derivatives 6. Reaction conditions: (i) 1) Pd(PPh₃)₄, CuI, piperidine, rt; 2) TBAF...

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Scheme 2: Two-step synthesis of V-shaped nematogens: symmetric (1) and non-C₂-symmetric (2) thiadiazoles. Rea...

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Figure 3: Comparison of the mesophase ranges of intermediate hockey stick compounds 3 and symmetric V-shaped ...

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Figure 4: Comparison of the thermal behaviour of symmetric and non-symmetric V-shaped molecules. The molecule...

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Figure 5: Textures of the nematic phase of 2c. a) Schlieren texture at 173 °C. b) and c) Planar alignment on ...

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Figure 6: X-ray study of nematic mesophases from V-shaped mesogens. A: Diffraction pattern of 2c at 70 °C. B:...

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Published 04 Dec 2009

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