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1 article(s) from Dobbs, William

1-(4-Alkyloxybenzyl)-3-methyl-1H-imidazol-3-ium organic backbone: A versatile smectogenic moiety

William Dobbs,
Laurent Douce and
Benoît Heinrich

Beilstein J. Org. Chem. 2009, 5, No. 62, doi:10.3762/bjoc.5.62

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Scheme 1: Mesogenic imidazolium synthesis [Reaction conditions: (i) DMF, K₂CO₃, BrC_nH₂_n₊₁, 60 °C, overnight; ...

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Scheme 2: Anion exchange in water.

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Figure 1: ¹H NMR spectrum (in CD₂Cl₂) of 1₁₀–6₁₀.

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Figure 2: TGA measurements of wet and water free 1₁₂ imidazolium salt.

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Figure 3: TGA measurements of the two entire series 1₁₀–6₁₀ and 1₁₄–6₁₄ (rate 10° C·min⁻¹, in air).

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Figure 4: Transition temperatures of 1₁₄–6₁₄ as a function of the anion (Cr = crystal; SmA: smectic A phase; ...

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Figure 5: (a) Illustration of a single homeotropic monodomain, which is observed as a black isotropic texture...

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Figure 6: Diffraction small-angle X-ray pattern of the smectic phase of 2₁₂ recorded at T = 100 °C.

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Figure 7: Variation with the counter-ion of the molecular area S and of the ionic sublayer thickness d_c (incl...

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Figure 8: Grazing incidence X-ray pattern at 100 °C on the top of a 3₁₂ droplet, slowly cooled down from isot...

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Figure 9: Variations with chain length of the maximum molecular areas close to isotropization S^max and of the...

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Published 06 Nov 2009

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