3 article(s) from Baumeister, Ute
Shape-persistent macrocycles with different peripheral side groups and intraannular templates.
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Synthesis of macrocycle 1a with an intraannular undecanedioxy bridge. a: Pd(PPh3)2Cl2, PPh3, CuI, p...
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GPC elugrams of the crude product of the cyclization reaction of 1a (—) and 1d (- - -), respectivel...
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Synthesis of the template free macrocycle 1d. a: Pd(PPh3)2Cl2, PPh3, CuI, piperidine, 98%; b: TBAF,...
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(a) Melting points (Tm) and clearing points (Tcl) of macrocycles with different interior. [a]First ...
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POM images of (a) 1a (20×, 133 °C, upon cooling); (b) 1d (20×, 84 °C, upon heating).
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2D X-ray patterns for 1d: (a) isotropic liquid at 160 °C, (b) partially aligned liquid crystalline ...
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2D X-ray patterns for 1a: (a) isotropic liquid at 150 °C, (b) columnar mesophase at 100 °C, surface...
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Model of the molecular packing in the columnar mesophase of 1a: (a) 2D packing scheme for the colum...
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Beilstein J. Org. Chem. 2014, 10, 910–920, doi:10.3762/bjoc.10.89
Examples for bent mesogens containing salicylideneimine moieties.
Synthetic pathway to prepare compounds OH 1.
Polarising optical microscopy images. a) Compound OH 1a: Grainy texture with smectic Schlieren area...
X-ray diffraction pattern of a powderlike sample of OH 1b at 131 °C (inset: Small angle region; low...
Electro-optical behaviour of compound OH 1a: a) current response curve (U = 182 Vpp, f = 30 Hz, T =...
Switching behaviour of compound H 1a, which depends on how quickly the electric field is switched o...
Reaction pathways to prepare the monosalicylideneaniline compounds OH 2a–j.
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Compound OH 2a: Texture of the SmCP phase at 126 °C.
a) 2D X-ray pattern of a surface-aligned sample of compound OH 2a at 128 °C (lower part of the patt...
Electro-optical switching behaviour of compound OH 2a: a) current response (U = 230 Vpp, f = 25 Hz, ...
Synthetic steps followed to prepare the compounds OH 3 and OH 4.
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Optical photomicrographs of compound OH 3a: a) On cooling of the isotropic liquid; c) U = 0 V; b) U...
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Electro-optical behaviour of compound OH 3a: a) Current response curve (U = 308 Vpp, f = 35 Hz, T =...
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Growth of a fan-shaped texture from lancetlike filaments upon cooling of the isotropic liquid of co...
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a) 2D X-ray pattern of a surface-aligned sample of compound OH 3b at 160 °C (lower part of the patt...
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Compound OH 3b: Texture of the SmCPA phase in dependence on the polarity of the applied D.C. field.
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Compound OH 4b, exhibiting a fan-shaped texture together with a Schlieren texture upon cooling of t...
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2D X-ray diffraction pattern of a partially surface-aligned sample of OH 4b at 115 °C (inset: Small...
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Switching behaviour of compound OH 4b at 120 °C: a) Current response curve (U = 116 Vpp, f = 40 Hz, ...
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Compound OH 4d: a) Microphotograph of a growing fringe pattern of a SmCP phase upon cooling of the ...
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Electro-optical behaviour observed on the fan-shaped texture of compound OH 4d; UD.C. = 47 V; T = 1...
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a) 2D X-ray diffraction pattern for a surface-aligned sample of OH 4d at 122 °C on cooling; b) χ-sc...
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Reaction steps employed for the preparation of the compounds OH 5 and OH 6.
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Compound OH 5d: Optical photomicrographs of chiral domains at 122 °C; polariser and analyser are un...
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Compound OH 5b: a), b) Chiral domains at 175 °C, 0 V, polarisers uncrossed by about ±8° from the 90...
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X-ray diffraction patterns of compounds OH 5: a) Pattern of a powderlike sample of compound OH 5g a...
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Photomicrographs of compound OH 5f: a) Appearance of spiral filaments on slow cooling of the isotro...
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Current response of compound OH 6b exhibiting two repolarisation peaks proving an antiferroelectric...
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On cooling the isotropic liquid phase of compound OH 6c; a Schlieren texture together with fringe p...
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Electro-optical behaviour of compound OH 6c: a) Current response (UA.C. = 17 V/µm, f = 39 Hz, T = 1...
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Beilstein J. Org. Chem. 2012, 8, 129–154, doi:10.3762/bjoc.8.15
Schematic illustration of the main parts of the setup used in our lab for coaxial electrospinning a...
Polarizing optical microscopy photographs of 8CB-containing composite fibres; (a) SmA phase at room...
Microscopy photographs of characteristic samples when varying the flow rate of the liquid crystal in...
Outer fibre diameters as a function of LC flow rate as determined from 50 measurements by optical m...
DSC thermograms on heating of 8CB as bulk and as inclusion compound in PVP fibres produced with dif...
The liquid crystal core shows a transformation from bubbly to smooth and to bubbly again with incre...
Influence of the applied voltage and the flow rate of the polymer solution on the mean fibre diamet...
a), b): 2D X-ray diffraction pattern of oriented fibres at two perpendicular roll-up directions sch...
X-ray diffraction patterns of PVP fibres without LC (a) and of surface-aligned samples of bulk 8CB ...
Schematic sketch of the arrangement of LC molecules and the smectic layers in an electrospun fibre.
Beilstein J. Org. Chem. 2009, 5, No. 58, doi:10.3762/bjoc.5.58
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