Ferroelectric properties of achiral banana-shaped and calamitic-chiral thioesters

Ossowska-Chruściel, D.M.; Kudłacz, Krzysztof; Sikorska, A.; Chruściel, J.; Marzec, M.; Mikułko, A.; Wróbel, S.; Douali, R.; Legrand, C.

doi:10.1080/01411590701346992

Cited by 13 publications

(17 citation statements)

References 9 publications

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“…As found the dielectric spectra of molecular origin measured for B 1 phases of 8OSOR (Ossowska-Chruściel et al, 2007) and 9OSOR do not depend on bias fields. Fig.…”

Section: Dielectric Relaxation Processes Of B 1 Phasesupporting

confidence: 50%

“…At the beginning some of the bent-core compounds were not chemically stable enough as to study them experimentally during cooling and heating runs in long lasting experiments (Wróbel et al, 2000). It came out that bent-core achiral thioesters are very stable materials showing either B 1 or B 2 phase (Rouillon et al, 2001;Ossowska-Chruściel, 2007, 2009. In this article we present complementary studies on B 1 and B 2 phases of 1,3-phenylene bis{4- [(4-alkoxybenzoyl)-sulfanyl]benzoates} (in short: nOSOR) having achiral symmetric bent-core molecules shown in Fig.…”

Section: Introductionmentioning

confidence: 97%

“…It has been shown by means of the dielectric spectroscopy (Ossowska- Chruściel et al, 2009;WierzejskaAdamowicz et al, 2010;Chruściel, 2011) that with electric measuring fields being parallel to the polar director p one observes an enhanced dielectric absorption and electric permittivity as well. As found in scope of this work there is an asymmetry of the dielectric spectra between the positive and negative bias fields ( Fig.…”

Section: Dielectric Spectroscopymentioning

confidence: 99%

See 2 more Smart Citations

Ferroelectric Liquid Crystals Composed of Banana-Shaped Thioesters

Wróbel¹,

Chruściel²,

Wierzejska-Adamowicz³

et al. 2011

Ferroelectrics - Physical Effects

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“…As found the dielectric spectra of molecular origin measured for B 1 phases of 8OSOR (Ossowska-Chruściel et al, 2007) and 9OSOR do not depend on bias fields. Fig.…”

Section: Dielectric Relaxation Processes Of B 1 Phasesupporting

confidence: 50%

Section: Introductionmentioning

confidence: 97%

Section: Dielectric Spectroscopymentioning

confidence: 99%

See 1 more Smart Citation

Ferroelectric Liquid Crystals Composed of Banana-Shaped Thioesters

Wróbel¹,

Chruściel²,

Wierzejska-Adamowicz³

et al. 2011

Ferroelectrics - Physical Effects

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“…However, by fitting the mean field function P S = P 0 (T C -T ) b to the experimental points one obtains the b parameter equal to 0.33 ±0.01 and 0.1 ±0.01 for C1 and C2 compounds, respectively. It is known from the studies on single component systems that the SmC* -SmCA* transition could be of the first order type [11,12].…”

Section: (A) and 4(b)mentioning

confidence: 99%

Investigation of new chiral fluorosubstituted compound exhibiting room temperature antiferroelectric phase

Czerwiec

Żurowska

Garbat

et al. 2011

Opto-Electronics Review

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Influence of the electric field upon alignment of molecules in ferro- and antiferroelectric phases has been studied for two fluoro-substituted compounds exhibiting antiferroelectric phase at room temperature. Two different relaxation processes have been revealed in the ferroelectric as well as antiferroelectric phase. Low temperature value of spontaneous polarization is ca. 130 nC/cm2 for both substances studied. The substances align very well in the external electric field — a mono-domain of the ferroelectric SmC* phase can be obtained in about 3.5 hours.

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“…MHOBS9 is chiral compound displaying N * and SmC * phases. Both compounds are characterized in a few publications [1][2][3][4][5][6] but in this study 0.5 molar fraction mixture was made to obtain a ferroelectric phase at room temperature. Table I shows temperature range of each phase for pure compounds and for their mixture as well.…”

Section: Introductionmentioning

confidence: 99%

Room Temperature Ferroelectric Mixture of Chiral and Achiral Thioesters

Czerwiec

Ossowska‐Chruściel²,

Chruściel³

et al. 2010

Acta Phys. Pol. A

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Dielectric properties of the mixture of two thioester compounds: 4-8-alkoxybenzoate-thiocarboxyl S-4-pentylphenyl (8OS5), (s)-4-(1-methylheptyloxy)biphenyl-4-thiocarboksyl 4-9-alkilphenyl (MHOBS9) are presented. The chiral compound exhibits nematic (N * ) and ferroelectric smectic C * phase (SmC * ). The achiral compound shows N, SmA and monotropic SmC and SmB phases. the mixture of both compounds of 0.5 molar fraction shows SmC * in the wider temperature range than pure MHOBS9. The mixture was studied using frequency domain dielectric spectroscopy. Dielectric measurements for the SmC * phase of the mixture revealed Goldstone mode at higher frequencies and Maxwell-Wagner relaxation at low frequencies.

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Ferroelectric properties of achiral banana-shaped and calamitic-chiral thioesters

Cited by 13 publications

References 9 publications

Ferroelectric Liquid Crystals Composed of Banana-Shaped Thioesters

Ferroelectric Liquid Crystals Composed of Banana-Shaped Thioesters

Investigation of new chiral fluorosubstituted compound exhibiting room temperature antiferroelectric phase

Room Temperature Ferroelectric Mixture of Chiral and Achiral Thioesters

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