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- W2094756096 abstract "Abstract Doping the novel chiral photochromic dye (R,R)-6,6′-bis(1-methylheptyloxy) thioindigo into the Sc liquid crystal host MX6120 at a concentration of 7.2 mol % gives rise to a ferroelectric S∗c phase with a reduced polarization (P 0) of +14.4 nCcm−2. Results of time-resolved experiments demonstrate that the dye undergoes trans→cis photoisomerization in the Sc phase, although the efficiency of photoisomerization is significantly lower than in the nematic and isotropic liquid phases. A reversible modulation of P s on the order of 10 per cent is observed for the doped S∗c phase upon photoisomerization of the dye from a thermally relaxed trans form (+6.2 nC cm−2) to a cis-enriched photostationary state (+5.6 nC cm−2) at T – Tc = −10°C. Control experiments using mixtures of the racemic and optically active dye in a S∗c host suggest that P s photomodulation does not arise from a photomechanical effect. Consideration of the Boulder model for the molecular origins of P s provides a rationale for the observe..." @default.
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- W2094756096 title "Modulating the spontaneous polarization of a ferroelectric liquid crystal via the photoisomerization of a chiral thioindigo dopant: (<i>R,R</i>)-6,6′-bis(1-methylheptyloxy) thioindigo" @default.
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- W2094756096 doi "https://doi.org/10.1080/02678299608033167" @default.
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