The invention relates to novel compounds which are especially suitable for use as writing monomers in holographic media. The invention further provides a photopolymer and a holographic medium comprising the inventive compounds, and an optical display, a security document and a holographic optical element comprising an inventive holographic medium.

The invention relates to naphthyl urethane acrylates particularly useful as writing monomers in photopolymer formulations for holographic media. The invention further relates to a photopolymer formulation comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, to a holographic medium comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, and also to a display comprising a holographic medium according to the invention.

The invention relates to naphthyl urethane acrylates particularly useful as writing monomers in photopolymer formulations for holographic media. The invention further relates to a photopolymer formulation comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, to a holographic medium comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, and also to a display comprising a holographic medium according to the invention.

The invention relates to a method for the stereoselective preparation of compounds of formula (IV).

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The invention relates to a method for the stereoselective preparation of compounds of formula (IV).

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The present invention provides a process for preparation of Vortioxetine hydrobromide (I). The present invention also relates to the novel intermediate and its use in preparation of vortioxetine hydrobromide (I).

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Quantum dot ligand, preparation method and quantum dot light-emitting device are provided. The quantum dot ligand has a structural general formula as shown in Formula I, XYZ Formula I; wherein X is a coordination group for forming a coordination bond with a quantum dot body; Z is a dissolving group, and the dissolving group is selected from a polar group; Y includes a linking group and a photosensitive group connected with each other, and the linking group is connected between the coordination group and the photosensitive group; the linking group is selected from an alkylene group; the photosensitive group is capable of undergoing bond breaking under light condition such that the quantum dot ligand decomposes into a first unit including the coordination group and the linking group, and a second unit including the dissolving group, and polarity of the first unit is less than polarity of the second unit.

Quantum dot ligand, preparation method and quantum dot light-emitting device are provided. The quantum dot ligand has a structural general formula as shown in Formula I, XYZ Formula I; wherein X is a coordination group for forming a coordination bond with a quantum dot body; Z is a dissolving group, and the dissolving group is selected from a polar group; Y includes a linking group and a photosensitive group connected with each other, and the linking group is connected between the coordination group and the photosensitive group; the linking group is selected from an alkylene group; the photosensitive group is capable of undergoing bond breaking under light condition such that the quantum dot ligand decomposes into a first unit including the coordination group and the linking group, and a second unit including the dissolving group, and polarity of the first unit is less than polarity of the second unit.

To provide a fluorinated compound capable of obtaining a cured product which is excellent in heat resistance and mold release and has a high Abbe number; a curable composition containing such a compound; and a cured product which is excellent in heat resistance and mold release and has a high Abbe number. The fluorinated compound is represented by the following formula (A):

[ZOCH.sub.2CF.sub.2CF.sub.2CF.sub.2OCFHCF.sub.2X-].sub.nQ(A)

where n is an integer of at least 1, Q is a n-valent organic group, X is O, NH or S, and Z is a group having at least one polymerizable functional group.

To provide a fluorinated compound capable of obtaining a cured product which is excellent in heat resistance and mold release and has a high Abbe number; a curable composition containing such a compound; and a cured product which is excellent in heat resistance and mold release and has a high Abbe number. The fluorinated compound is represented by the following formula (A):

[ZOCH.sub.2CF.sub.2CF.sub.2CF.sub.2OCFHCF.sub.2X-].sub.nQ(A)

where n is an integer of at least 1, Q is a n-valent organic group, X is O, NH or S, and Z is a group having at least one polymerizable functional group.