Matthias Bremer
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View article: The 2,4,6,8‐Tetramethylhomotropyliumdication
The 2,4,6,8‐Tetramethylhomotropyliumdication Open
In 1976 George A. Olah et al. synthesized the Hückel‐aromatic 1,3,5,7‐tetramethylcyclo‐octatetraene dication 3 under stable ion conditions. As observed by NMR spectroscopy, 3 rearranges at −20°C to the 1,3,5,7‐tetramethylbicyclo[3.3.0]‐dic…
View article: Room‐Temperature Multiferroic Liquids: Ferroelectric and Ferromagnetic Order in a Hybrid Nanoparticle–Liquid Crystal System
Room‐Temperature Multiferroic Liquids: Ferroelectric and Ferromagnetic Order in a Hybrid Nanoparticle–Liquid Crystal System Open
Responsiveness to multiple stimuli and adaptivity are paramount for designing smart multifunctional materials. In soft, partially ordered systems, these features can often be achieved via self‐assembly, allowing for the combination of dive…
View article: Nanostructured multiferroic liquids: on the way to fluid ferroelectric magnets
Nanostructured multiferroic liquids: on the way to fluid ferroelectric magnets Open
Responsiveness to multiple stimuli and adaptivity are paramount for designing smart multifunctional materials. In soft, partially ordered systems, these features can often be achieved via self-assembly, allowing for the combination of dive…
View article: Unexpected reaction of antimony pentafluoride with a fluorinated propellane
Unexpected reaction of antimony pentafluoride with a fluorinated propellane Open
While 1,3-dehydro-5,7-difluoroadamantane 11 reacts with SbF5 in super acid media (SO2ClF) to generate the 1,3-dehydroadamant-5,7-diyl dication 1, 1,3-dehydro-5-fluoroadamantane 12 fails to react analogously to produce the 1,3-dehydroadaman…
View article: Fluid fibers in true 3D ferroelectric liquids
Fluid fibers in true 3D ferroelectric liquids Open
We demonstrate an exceptional ability of a high-polarization 3D ferroelectric liquid to form freely suspended fluid fibers at room temperature. Unlike fluid threads in modulated smectics and columnar phases, where translational order is a …
View article: New examples of ferroelectric nematic materials showing evidence for the antiferroelectric smectic-Z phase
New examples of ferroelectric nematic materials showing evidence for the antiferroelectric smectic-Z phase Open
We present a new ferroelectric nematic material, 4-((4′-((trans)-5-ethyloxan-2-yl)-2′,3,5,6′-tetrafluoro-[1,1′-biphenyl]-4-yl)difluoromethoxy)-2,6-difluorobenzonitrile (AUUQU-2-N) and its higher homologues, the molecular structures of whic…
View article: Fluid fibres in true 3D ferroelectric liquids
Fluid fibres in true 3D ferroelectric liquids Open
We demonstrate an exceptional ability of a high-polarisation 3D ferroelectric liquid to form freely-suspended fluid fibres at room temperature. Unlike fluid threads in modulated smectics and columnar phases, where translational order is a …
View article: Observation of a uniaxial ferroelectric smectic A phase
Observation of a uniaxial ferroelectric smectic A phase Open
We report the observation of the smectic A F , a liquid crystal phase of the ferroelectric nematic realm. The smectic A F is a phase of small polar, rod-shaped molecules that form two-dimensional fluid layers spaced by approximately the me…
View article: CCDC 2078430: Experimental Crystal Structure Determination
CCDC 2078430: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Polarisation-driven magneto-optical and nonlinear-optical behaviour of a room-temperature ferroelectric nematic phase
Polarisation-driven magneto-optical and nonlinear-optical behaviour of a room-temperature ferroelectric nematic phase Open
Nematics with a broken polar symmetry is one of the fascinating recent discoveries in the field of soft matter. High spontaneous polarisation and the fluidity of the ferroelectric nematic $N_{\mathrm{F}}$ phase make such materials attracti…
View article: Polarisation-driven magneto-optical and nonlinear-optical behaviour of a room-temperature ferroelectric nematic phase
Polarisation-driven magneto-optical and nonlinear-optical behaviour of a room-temperature ferroelectric nematic phase Open
In ferroelectric nematics, strong splay rigidity can be attributed to the electrostatic self-interaction of polarisation, avoiding the polarisation splay.
View article: Vibrational circular dichroism studies of exceptionally strong chirality inducers in liquid crystals
Vibrational circular dichroism studies of exceptionally strong chirality inducers in liquid crystals Open
Chiral dopants are used in liquid crystal displays to introduce uniform helical alignment. VCD can provide unambiguous determination of the absolute configuration and structural details of such a dopant, while X-ray crystallography fails.
View article: Synthesis of organic liquid crystals containing selectively fluorinated cyclopropanes
Synthesis of organic liquid crystals containing selectively fluorinated cyclopropanes Open
This paper describes the synthesis of a series of organic liquid crystals (LCs) containing selectively fluorinated cyclopropanes at their termini. The syntheses used difluorocarbene additions to olefin precursors, an approach which proved …
View article: Highly efficient chirality inducers in nematic liquid crystals: synthesis of 7,7’-disubstituted 2,2’-methylenedioxy-1,1’-binaphthyls
Highly efficient chirality inducers in nematic liquid crystals: synthesis of 7,7’-disubstituted 2,2’-methylenedioxy-1,1’-binaphthyls Open
We report the synthesis of 7,7ʹ-disubstituted 2,2ʹ-methylenedioxy-1,1ʹ-binaphthyls and demonstrate their application as chiral dopants in the nematic mixture MLC-6260 to produce highly twisted cholesteric phases. Especially mesogenic and/o…