Abstract:
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.
Abstract:
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; R1 is hydrogen, C1-9 alkyl group, C5-10 cycloalkyl group, or C5-12 aromatic group; each of R2 is independent and can be hydrogen, halogen, cyano group, C1-9 alkyl group, C1-6 fluoroalkyl group, C5-10 cycloalkyl group, or C5-12 aromatic group; R3 is halogen; and, R4 and R5 are independently the same or different hydrogen, hydroxyl group, amine group, alkyl amine group, halogen, cyano group, C1-9 alkyl group, C1-6 fluoroalkyl group, C5-10 cycloalkyl group, or C5-12 aromatic group.
Abstract:
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.