Non-symmetric liquid crystal dimer containing a carbohydrate-based moiety

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Structure-property relationships in azobenzene-based twist-bend nematogens

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HIV prevention for South African youth: which interventions work? A systematic review of current evidence

In South Africa, HIV prevalence among youth aged 15-24 is among the world's highest. Given the urgent need to identify effective HIV prevention approaches, this review assesses the evidence base for youth HIV prevention in South Africa

Electrically tunable selective reflection of light from ultraviolet to visible and infrared by heliconical cholesterics

Cholesteric liquid crystals with helicoidal molecular architecture are known for their ability to selectively reflect light with the wavelength that is determined by the periodicity of molecular orientations. Here we demonstrate that by using a cholesteric with oblique helicoidal(heliconical) structure, as opposed to the classic right-angle helicoid, one can vary the wavelength of selectively reflected light in a broad spectral range, from ultraviolet to visible and infrared (360-1520 nm for the same chemical composition) by simply adjusting the electric field applied parallel to the helicoidal axis. The effect exists in a wide temperature range (including the room temperatures) and thus can enable many applications that require dynamically controlled transmission and reflection of electromagnetic waves, from energy-saving smart windows to tunable organic lasers, reflective color display, and transparent see-through displays.Comment: 11 pages, 5figure

A convenient one-pot synthesis, and characterisation of the ω-bromo-1-(4-cyanobiphenyl-4’-yl) alkanes (CBnBr)

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Can even-membered liquid crystal dimers exhibit the twist-bend nematic phase? The preparation and properties of disulphide and thioether linked dimers

Publisher Copyright: © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.Peer reviewedPublisher PD

Tailoring amide N-substitution to direct liquid crystallinity in benzanilide-based dimers

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Chalcogen bonding and liquid crystallinity: understanding the anomalous behaviour of the 4'-(alkylthio)[1,1'-biphenyl]-4-carbonitriles (nSCB).

The synthesis and characterisation of the first eleven members of the 4'-(alkylthio)[1,1'-biphenyl]-4-carbonitriles series is reported. All eleven members show monotropic liquid crystal behaviour. The first six members are exclusively nematogenic, the seventh member shows nematic and smectic A phases, and the higher homologues only smectic A behaviour. A comparison of their transitional behaviour with that of the corresponding alkyl and alkyloxy-cyanobiphenyls reveals a new pattern of behaviour. Specifically, the nematic-isotropic transition temperatures show a large decrease on passing from the methylthio to ethylthio homologues. This unexpected behaviour is interpreted in terms of chalcogen bonding

Remarkable smectic phase behaviour in odd-membered liquid crystal dimers : The CT6O.mseries

Funding Information: EG and DP acknowledge the support of the National Science Centre (Poland): (Grant Number 2016/22/A/ST5/00319). RW gratefully acknowledges The Carnegie Trust for the Universities of Scotland for funding the award of a PhD scholarship 2015-2018.Peer reviewedPublisher PD

Liquid Crystal Dimers and Smectic Phases from the Intercalated to the Twist-Bend

Funding: This research received no external funding. Acknowledgments: The authors gratefully acknowledge Professor Nataša Vaupoticˇ for her central role in the interpretation of the resonant soft X-ray scattering (RSoXS) data and the preparation of the original figures. The authors also wish to thank Ewan Cruickshank for many helpful discussions.Peer reviewedPublisher PD