A series of 8-(bisphenylethynyl)-ester flexible multiple ring-containing fluoroboron pyrrole liquid crystal dyes are synthesized by introducing a diphenylethynyl rigid structure at position 8 of a boron-dipyrromethene core via a Sonogashira coupling reaction, and a flexible multiple ring such as bicyclohexane, or cholesterol is connected to the biphenylethynyl via an esterification reaction. The dye compounds all have maximum emission wavelengths in methylene chloride concentrated around 525 nm, present green fluorescence, and show good dichroic colour ratios and ordered parameters in E7 liquid crystal. The liquid crystal compounds are in a liquid crystal intermediate phase within the range of 100-280° C., and may be used for manufacturing liquid crystal display products, especially as guest dyes for guest-host mode liquid crystal displays. The response time can be improved and a rapid response effect achieved when the compounds are added to E7 liquid crystal and used for a guest-host display mode.

Provided is (i) a composition containing at least one kind of polymerizable liquid crystal compound and at least one kind of photopolymerization initiator, the at least one kind of photopolymerization initiator having (i) a maximum absorption at wavelength λ(A) and (ii) a maximum absorption at wavelength λ(B), the at least one kind of polymerizable liquid crystal compound and the at least one kind of photopolymerization initiator satisfying the following: 20 nm<λ(B)−λ.sub.max(LC); or 20 nm<λ.sub.max(LC)−λ(A), wherein λ.sub.max(LC) represents a wavelength at which the at least one kind of polymerizable liquid crystal compound has a maximum absorption, the composition being a composition from which an optically anisotropic layer that hardly has a transfer defect during a transfer is capable of being produced, and (ii) a display device and the like each including the optically anisotropic layer produced from the composition.

A series of 8-(bisphenylethynyl)-ester flexible multiple ring-containing fluoroboron pyrrole liquid crystal dyes are synthesized by introducing a diphenylethynyl rigid structure at position 8 of a boron-dipyrromethene core via a Sonogashira coupling reaction, and a flexible multiple ring such as bicyclohexane, or cholesterol is connected to the biphenylethynyl via an esterification reaction. The dye compounds all have maximum emission wavelengths in methylene chloride concentrated around 525 nm, present green fluorescence, and show good dichroic colour ratios and ordered parameters in E7 liquid crystal. The liquid crystal compounds are in a liquid crystal intermediate phase within the range of 100-280° C., and may be used for manufacturing liquid crystal display products, especially as guest dyes for guest-host mode liquid crystal displays. The response time can be improved and a rapid response effect achieved when the compounds are added to E7 liquid crystal and used for a guest-host display mode.

The present subject matter relates to a fluorescent compound having aggregation-induced emission (AIE) characteristics. The compound can be a rod-like chiral luminogen bearing a chiral moiety at one end and long aliphatic chains at an opposing end. The compound emits circularly polarized light or luminescence (CPL) in the aggregate state. For example, the compound does not exhibit a chiroptical signal when dispersed in solution, but demonstrates tunable CPL signals in the aggregate state.

To provide a polarized luminescent film obtained by applying, to a substrate material, a polymerizable composition including a rod-like luminescent nanocrystal and a polymerizable liquid crystal compound, and radiating an active energy ray, and to provide a film having good polarization characteristics. The present invention provides a polarized luminescent film and a polarized luminescent multilayered body formed from a polymerizable composition containing a rod-like luminescent nanocrystal and a polymerizable liquid crystal compound. The present invention also provides a backlight and a display device including a polarized luminescent multilayered body according to the present invention.

Light emitting electrochemical cell devices comprising chiral liquid crystalline materials. The chiral liquid crystalline material mixtures of the devices function as both electrolytes and as light emitting materials. The chiral liquid crystalline material mixtures also form photonic crystal structures creating a photonic stop band. The presence of the photonic stop band enables the light emitting electrochemical cell devices to emit light with improved energy efficiency.

The present subject matter relates to a fluorescent compound having aggregation-induced emission (AIE) characteristics. The compound can be a rod-like chiral luminogen bearing a chiral moiety at one end and long aliphatic chains at an opposing end. The compound emits circularly polarized light or luminescence (CPL) in the aggregate state. For example, the compound does not exhibit a chiroptical signal when dispersed in solution, but demonstrates tunable CPL signals in the aggregate state.

Provided is (i) a composition containing at least one kind of polymerizable liquid crystal compound and at least one kind of photopolymerization initiator, the at least one kind of photopolymerization initiator having (i) a maximum absorption at wavelength (A) and (ii) a maximum absorption at wavelength (B), the at least one kind of polymerizable liquid crystal compound and the at least one kind of photopolymerization initiator satisfying the following: 20 nm<(B).sub.max(LC); or 20 nm<.sub.max(LC)(A), wherein .sub.max(LC) represents a wavelength at which the at least one kind of polymerizable liquid crystal compound has a maximum absorption, the composition being a composition from which an optically anisotropic layer that hardly has a transfer defect during a transfer is capable of being produced, and (ii) a display device and the like each including the optically anisotropic layer produced from the composition.