Jnc Corporation

Chisso Petrochemical Corporation

Chisso Corporation

Jnc Petrochemical Corporation

Other

Kouki Sagou

Hiroyuki Takeuchi

Etsuo Nakagawa

Shuichi Matsui

Yasuhiro Kubo

Tomoyuki Kondo

Norikatsu Hattori

Mayumi Goto

Masayuki Saito

Yasuhiro Haseba

Teruyo Sugiura

Hiroyuki Tanaka

Atsuko Fujita

Hiroaki Fujita

Shuichi Goto

Provided is a liquid crystal compound having general physical properties necessary for a compound, stability to heat, light or the like, a wide liquid crystal phase temperature range, a high clearing point, an excellent compatibility with other liquid crystal compounds, a large refractive index anisotropy and a large dielectric anisotropy. Provided are a liquid crystal composition including the liquid crystal compound, and a liquid crystal display device containing the liquid crystal composition. The compound is represented by formula (1): wherein, for example, Ris alkyl having 1 to 20 carbons; at least one of the rings Ato Ais pyrimidine-2,5-diyl or pyridine-2,5-diyl and the others are 1,4-cyclohexylene or 1,4-phenylene; Zto Zare a single bond; Lto Lis hydrogen or halogen; Xis hydrogen, halogen, &#x2014;C&#x2261;N or alkyl having 1 to 10 carbons; and l, m, n, o, p and q are 0 or 1 and l+m+n+o+p+q=3.

Five-ring liquid crystal compound having a nitrogen-containing heterocyclic ring, liquid crystal composition and liquid crystal display device

A liquid crystal compound is to be obtained that has stability to heat, light and so forth, a high clearing point, a suitable optical anisotropy, a large negative dielectric anisotropy, and excellent compatibility with other liquid crystal compounds. A liquid crystal composition containing the compound is also to be obtained that has a low viscosity, a suitable optical anisotropy, a suitable negative dielectric anisotropy, a low threshold voltage, a high maximum temperature of a nematic phase (phase transition temperature from a nematic phase to an isotropic phase), and a low minimum temperature of a nematic phase. A compound having a hydrocoumarin skeleton is synthesized, and a liquid crystal composition containing the compound is produced.

Compound having hydrocoumarin skeleton, liquid crystal compostition, and liquid crystal display device

The subject is to provide a liquid crystal composition that satisfies at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light, a high stability to heat and a large elastic constant, or that is suitably balanced regarding at least two of the characteristics. The subject is to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The invention provides a liquid crystal composition that has a nematic phase and includes a specific four-ring compound having a high maximum temperature and a large dielectric anisotropy as a first component and a specific compound having a small dielectric anisotropy as a second component, and also provides a liquid crystal display device containing this composition. The invention further provides the compound of the first component.

Liquid crystal compound, liquid crystal composition and liquid crystal display device

The invention provides a liquid crystal composition that satisfies at least one characteristic among the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light, and a high stability to heat, or that is suitably balanced regarding two or more characteristics. The invention provides an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. A liquid crystal display device contains the liquid crystal composition having a nematic phase that includes two components, wherein the first component is a specific compound having a large optical anisotropy and a large dielectric anisotropy and the second component is a specific compound having a small viscosity or a large maximum temperature. The liquid crystal display device contains the composition.

Liquid crystal composition and liquid crystal display device

Compound having hydrocoumarin skeleton, liquid crystal composition, and liquid crystal display device

The present invention relates to a compound having a chroman ring, which has good thermal and optical stability, adequate optical anisotropy, adequate dielectric anisotropy and superior compatibility with other liquid crystal compounds, a liquid crystal composition comprising the compound, and a liquid crystal device comprising the composition. A compound represented by formula (1) below is provided: where Ris hydrogen or C-Calkyl; Ris halogen, &#x2014;CN, alkyl (at least one hydrogen of which is replaced by halogen), alkenyl (at least one hydrogen of which may be replaced by halogen), or alkoxy (at least one hydrogen of which may be replaced by halogen); each of A, A, Aand Ais independently 1,4-cyclohexylene, 1,4-cyclohexenylene or 1,4-phenylene, in which any &#x2014;CH&#x2014; may be replaced by &#x2014;O&#x2014; or &#x2014;S&#x2014;, any &#x2014;CH&#x2550; may be replaced by &#x2014;N&#x2550; and any hydrogen may be replaced by halogen, methyl or &#x2014;CF; each of Z, Z, Zand Zis independently a single bond or C-Calkylene; each of h, k, m and n is independently 0, 1 or 2, the sum of h, k, m and n being 1, 2 or 3; and Q is one of the group represented by formulas (q1), (q2) and (q3) below: where Xis hydrogen, halogen, methyl, ethyl, methoxy, ethoxy, &#x2014;CF, &#x2014;CFH, &#x2014;CFH, &#x2014;OCF, &#x2014;OCFH, or &#x2014;OCFH; and each of Y, Y, Y, Yand Yis independently hydrogen, halogen or methyl.

Liquid crystal compound having chroman ring, liquid crystal composition comprising the compound and liquid crystal display device comprising the composition

The present invention provides a process for producing a difluoromethyl ether derivative simple and efficient process for producing the difluoromethyl ether derivative represented by Formula (1d') or a difluoromethyl ether derivative represented by Formula (1c&#x2032;):

Difluoromethyl ether derivative and process for producing the same

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Chiba, Japan

Kouki Sagou