Guest-Host Interactions in Nematic Liquid Crystals

Heilmeier, George H.; Castellano, Joseph A.; Zanoni, Louis A.

doi:10.1080/15421406908084910

Cited by 175 publications

(34 citation statements)

References 4 publications

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“…Another simple way to obtain information about the long-range orientational order in nematic phase is utilization of the liquid crystal as a host matrix for a dichroic dye probe ("guest-host" effect [12,13]). If the molecular structure of the dye is similar in size and shape to that of the liquid crystal molecules, the dye adapts the same anisotropic orientation as the nematic host phase.…”

Section: Determination Of Order Parametermentioning

confidence: 99%

Dielectric and Optical Studies of Homologous Series of Bicyclo[2,2,2]octane Derivatives with -NCS Terminal Group

et al. 1995

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The static dielectric constants and the optical birefringence for four members of the homologous series of bicyclo[2,2,2]octane derivatives with -NCS terminal group (pentyl to octyl) have been measured as a function of temperature. From the dielectric anisotropy, the optical birefringence as well as the polarized absorption spectra of the dichroic dye dissolved in the liquid crystalline host the order parameter has been determined. The results obtained by using various experimental methods have been compared with those calculated from the Maier-Saupe mean field theory. It has been found that the order parameter for the successive homologues shows alternation similar to that exhibited for the nematic-isotropic transition temperature.

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Section: Determination Of Order Parametermentioning

confidence: 99%

Dielectric and Optical Studies of Homologous Series of Bicyclo[2,2,2]octane Derivatives with -NCS Terminal Group

et al. 1995

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“…Therefore, they can be used as guest species in guestehost liquid crystal displays (GH LCDs) working both in passive and active modes [4,5]. Because of the excellent fluorescent properties and the structure of molecules these dyes are also good candidates for application as active layers in organic light emitting diodes (OLEDs) [6].…”

Section: Introductionmentioning

confidence: 99%

Spectral properties of some fluorescent dyes in two-dimensional films formed by means of Langmuir–Blodgett technique

et al. 2007

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“…The most common LCDs used today are based on the twisted nematic (TN) principle [1]. An alternative display technique consists in incorporating a dichroic dye (guest) in a liquid crystal matrix (host) and using the guest-host effect [2,3]. Guest-host liquid crystal displays (GE LCDs) can work with one, or even no polarizers [4] and therefore the viewing cone is very wide and uniform and the brightness is significantly higher than in the case of TN LCDs.…”

Section: Introductionmentioning

confidence: 99%

Guest Effect on Nematic-Isotropic Phase Transition Temperature of Liquid Crystal 6CHBT

1997

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The polarized absorption spectra of seven dichroic azo dyes dissolved in the nematogenic liquid crystal host 6CHBT have been recorded as a function of temperature. On the basis of these spectra, the guest order parameter has been determined. Moreover, the influence of the dye addition on the behaviour of the guest-host mixture in the vicinity of the nematic-isotropic phase transition has been examined. The experimental results have been compared in some details with the calculations done on the basis of the mean field theory for binary mixtures.

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Guest-Host Interactions in Nematic Liquid Crystals

Cited by 175 publications

References 4 publications

Dielectric and Optical Studies of Homologous Series of Bicyclo[2,2,2]octane Derivatives with -NCS Terminal Group

Dielectric and Optical Studies of Homologous Series of Bicyclo[2,2,2]octane Derivatives with -NCS Terminal Group

Spectral properties of some fluorescent dyes in two-dimensional films formed by means of Langmuir–Blodgett technique

Guest Effect on Nematic-Isotropic Phase Transition Temperature of Liquid Crystal 6CHBT

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