Industrial Technology Research Institute

Wan-Chi Chen

Kung-Lung Cheng

Chih-Lung Chin

Shih-Hsien Liu

Yi-Rong Wang

Chun-Ming Wu

Hui-Fang Tseng

A method for preparing a nitrate ester is provided. The method includes providing a first solution including a compound (which has at least one hydroxyl group) and a carboxylic acid having 2-5 carbon atoms; providing a second solution including nitric acid, acetic anhydride, and acetic acid; and transferring the first solution and the second solution to a microreactor, obtaining a nitrate ester after a residence time. In particular, the ratio of the weight of nitric acid to the total volume of the acetic anhydride and acetic acid is 1:1 to 1:3.5. The ratio of the molar amount of nitric acid to the hydroxyl group equivalent of the compound is from 1:1 to 15:1.

Method for preparing nitrate ester

Organic metal compounds, organic light-emitting devices, and lighting devices employing the same are provided. The organic metal compound has a chemical structure represented by Formula (I): wherein M is Ir, Pt, Ru, Os, Cu, Au, or Pd; n is 1, 2, or 3; m is 0, 1, or 2, and the sum of m and n is equal to a valence of M; L is a bidentate ligand; Ris hydrogen, Calkyl group, Ccycloalkyl group, or Caromatic group; each of Ris independent and can be hydrogen, halogen, cyano group, Calkyl group, Cfluoroalkyl group, Ccycloalkyl group, or Caromatic group; Ris halogen; and, Rand Rare independently the same or different hydrogen, hydroxyl group, amine group, alkyl amine group, halogen, cyano group, Calkyl group, Cfluoroalkyl group, Ccycloalkyl group, or Caromatic group.

Organic metal compound, organic light-emitting device, and lighting device employing the same

In an embodiment of the present disclosure, a liquid crystal display is provided. The liquid crystal display includes an upper substrate, a lower substrate opposite to the upper substrate, and a liquid crystal layer disposed between the upper substrate and the lower substrate, wherein the liquid crystal layer includes a first chiral compound and a second chiral compound, and the first chiral compound and the second chiral compound are enantiomeric and separated from each other.

Liquid crystal displays

A chiral compound of formula (I) or (II) is provided, wherein each of Rand Rindependently, is hydrogen, hydroxyl, halogen, amino, nitrile, Calkyl, or Calkoxyl. A liquid crystal composition comprising 80-99.5 parts by weight of a liquid crystal host; and 0.5-20 parts by weight of the chiral compound as described above is also provided.

Chiral compound and liquid crystal composition containing the same

A liquid crystal compound of Formula (I) is provided.  In Formula (I), A is benzene, naphthalene, pyridine, furan, thiophene or a single bond, D is benzene, naphthalene, pyridine, furan, thiophene or a single bond, Rand Rare C1-10 alkyl, C1-10 alkoxy, fluoro or trifluoro methyl, E is benzene, naphthalene, pyridine, furan, thiophene or a single bond, W is &#x2014;CO&#x2014;O&#x2014;, &#x2014;O&#x2014;CO&#x2014;, &#x2014;O&#x2014;, &#x2014;CH&#x2014;CH&#x2014;, &#x2014;CH&#x2550;CH&#x2014;, &#x2014;CH&#x2014;O&#x2014; or a single bond, Z is benzene, naphthalene, pyridine, furan, thiophene or a single bond, Y is hydrogen, methyl, ethyl or propyl, m is 0, 1 or 2, p is 0, 1 or 2, r is 0, 1 or 2, q is 0, 1 or 2, and n is 0, 1, 2 or 3. The invention also provides a liquid crystal display and photochromic material including the compound.

Liquid crystal compounds, and liquid crystal displays and photochromic materials comprising the liquid crystal compounds

A liquid crystal composition and a liquid crystal display employing the same are provided. The liquid crystal composition includes: 100 parts by weight of at least one nematic liquid crystal; 1-20 parts by weight of at least one photosensitive chiral compound; and 1-20 parts by weight of at least one non-photosensitive chiral compound.

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Sinwu, Taiwan

Wan-Chi Chen