Calorimetric and optical investigation of the nematic, splay-nematic, and ferroelectric nematic phases of RM734 liquid crystal

Liquid Crystals, Год журнала: 2025, Номер unknown, С. 1 - 8

Опубликована: Март 19, 2025

Язык: Английский

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Liquid Crystal Research and Novel Applications in the 21st Century

Crystals, Год журнала: 2025, Номер 15(4), С. 321 - 321

Опубликована: Март 28, 2025

Liquid crystals (LCs) are largely known as the materials used in flat panel displays, from simple pocket calculator displays to laptop screens, all way large TVs [...]

Язык: Английский

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Reactive Fluid Ferroelectrics: A Gateway to the Next Generation of Ferroelectric Liquid Crystalline Polymer Networks

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

Abstract Herein it is reported the first examples of reactive mesogenic materials (RMs) which exhibit fluid ferroelectric order based on recently discovered nematic (N F ) phase. These N RMs and they provide steps toward next generation liquid crystalline polymer networks termed. The chemical synthesis characterization properties these reported, demonstrating that have lowest longitudinal molecular dipole moments (µ) any material 7.39 D. It go to demonstrate a potential use case this new class through stabilization matrix exhibits phase, increasing phase range from 75 120 °C. herein are an exciting step forward in crystal research, achievable, allowing for future development networks, elastomers polymers.

Язык: Английский

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Static and hydrodynamic periodic structures induced by ac electric fields in the antiferroelectric SmZA phase

Physical review. E, Год журнала: 2025, Номер 111(4)

Опубликована: Апрель 18, 2025

We report the effect of AC electric fields in range 0.1-300 kHz on antiferroelectric SmZ_{A} layers DIO bookshelf geometry. Significant results are (a) primary bifurcation into a quasistationary periodic instability with its voltage threshold U_{c} and wave vector q_{c} along initial director being, respectively, quadratic linear functions f over 10-150 kHz, an azimuthal distortion n which changes sign between adjacent stripes, (b) transition from modulated state to homogeneous at higher voltages, (c) third traveling further rise U region 10-40 kHz. interpret these findings as follows. The low is very similar that seen temperature apolar nematic phase electrohydrodynamic (EHD) possibly belonging dielectric inversion frequency. distortions result undulatory book-shelf intermediate structure absent coupling layer polarization P applied field E, giving scissoring type mutual reorientation layers. Finally, even medium goes field-induced ferroelectric nematic, following field, EHD being regime. polar symmetry leads general waves.

Язык: Английский

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Optical, dielectric and electroconvection studies of a five-ring ester-difluoromethoxy linked ferroelectric nematic liquid crystal with a lateral methoxy group

Soft Matter, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Experimental studies on a five-ring ester-difluoromethoxy linked ferroelectric nematic liquid crystal.

Язык: Английский

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Ions in molecular liquid crystals: facts, modern trends, and implications

Liquid Crystals Reviews, Год журнала: 2025, Номер 13(1), С. 1 - 57

Опубликована: Янв. 2, 2025

Язык: Английский

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Reviewing Ferroelectric Nematic Liquid Crystals: From Fundamental Properties to Cutting‐Edge Applications

Applied Research, Год журнала: 2025, Номер 4(3)

Опубликована: Май 19, 2025

ABSTRACT Ferroelectric nematic (N F ) liquid crystals (LCs) have garnered substantial interest due to their unique polar ordering, phase transitions, and electro‐optic (E‐O) properties, with potential applications spanning from low‐power reflective displays advanced photonics microfluidics. This review explores the multifaceted nature of N LCs comprehensively analyzes behavior, alignment, surface interactions. Notable findings include (N)‐N transition's weak first‐order nature, treatments' role in inducing order, meron‐like structures resembling ferromagnetic domains. Furthermore, highlights tunability under electric fields, offering exciting possibilities for adaptive optics, sensors, actuators. Despite these advancements, challenges remain optimizing molecular controlling defects, expanding scalability LC technologies. By addressing key experimental theoretical studies, this aims present a deeper understanding crystals' E‐O responses, revolutionize future LC‐based

Язык: Английский

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Molecular structure and the ferroelectric nematic phase: the effect of terminal chain and fluorination pattern

Liquid Crystals, Год журнала: 2025, Номер unknown, С. 1 - 11

Опубликована: Май 21, 2025

Язык: Английский

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The Influence of Methyl Groups on the Formation of the Ferroelectric Nematic Phase

ACS Omega, Год журнала: 2025, Номер unknown

Опубликована: Май 27, 2025

Язык: Английский

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Efficient synthesis of fluorinated triphenylenes with enhanced arene–perfluoroarene interactions in columnar mesophases

Beilstein Journal of Organic Chemistry, Год журнала: 2024, Номер 20, С. 3263 - 3273

Опубликована: Дек. 16, 2024

The high potential of non-covalent arene–fluoroarene intermolecular interactions in the design liquid crystals lies their ability to strongly promote self-assembly, improve order and stability supramolecular mesophases, enable tuneability optical electronic properties, which can potentially be exploited for advanced applications display technologies, photonic devices, sensors, organic electronics. We recently successfully reported straightforward synthesis several mesogens containing four lateral aliphatic chains derived from classical triphenylene core self-assembling columnar mesophases based on this paradigm. These mesogenic compounds were simply obtained good yields by nucleophilic substitution (S N FAr) various types commercially available fluoroarenes with electrophilic organolithium derivatives 2,2'-dilithio-4,4',5,5'-tetraalkoxy-1,1'-biphenyl (2Li- BP n ). In a continuation study, aiming at testing limits reaction providing large diversity structures, structurally related series is here, namely 1,2,4-trifluoro-6,7,10,11-tetraalkoxy-3-(perfluorophenyl)triphenylenes ( F They reacting above mentioned 2,2’-dilithiobiphenyl decafluorobiphenyl, C 6 5 –C . differ previously series, 1,2,4-trifluoro-6,7,10,11-tetraalkoxy-3-aryltriphenylenes PH ), solely terminal phenyl ring pentafluorophenyl ring. Thus, as expected, they Col hex mesophase over temperature ranges, only small differences transition temperatures. Furthermore, presence fluorophenyl group enables subsequent second annulation, yielding new extended polyaromatic mesomorphic compounds, i.e., 1,1',3,3',4,4'-hexafluoro-6,6',7,7',10,10',11,11'-octaalkoxy-2,2'-bitriphenylene G nm ) found rec mesophase. specific patterns antiparallel stacking mode into structures stabilized arene–perfluoroarene confirmed single-crystal structure alkoxy-free side chain analog, 1,2,4-trifluoro-3-(perfluorophenyl)triphenylene UV–vis absorption fluorescence emission spectroscopies reveal green photoluminescence quantum up 33% derivatives. J -aggregation inner fluorine-substituted dimers energetically stereoelectronically more favorable 66 exhibits thin-film red-shift peak.

Язык: Английский

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