2-phenylpyridine derivatives and liquid crystal compositions including same
AssigneeSeiko Epson Corporation
InventorsYoshio Shionozaki, Hiroshi Mukai, Tsuyoshi Obikawa, Shuhei Yamada
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Abstract
2-phenylpyridine derivatives represented by the general formula: ##STR1## wherein when Y is R--, Z is one of R--, RO--, ##STR2## when Y is RO--, Z is one of straight chain pentyl, ##STR3## and --CN; and when Y is one of ##STR4## Z is one of R--, RO-- and --CN; when Y is --CN, Z is one of RO--, ##STR5## and R is a straight chain alkyl group from 1 to 12 carbon atoms, are disclosed. The 2-phenylpyridine derivatives in accordance with the invention are particularly well-suited for use in nematic liquid crystal compositions for reducing the steepness and response time of the liquid crystal compositions in a liquid crystal display device.
Claims12
2-phenylpyridine derivatives represented by the general formula:
- ##STR263## wherein Y is RO--, Z is a straight chain pentyl group, and R is a straight chain alkyl group having from 1 to 12 carbon atoms.
A nematic liquid crystal composition comprising an effective amount of at least one 2-phenylpyridine derivative having the general formula:
- ##STR264## wherein Y' is RO--, Z' is a straight chain pentyl group, and R is a straight chain alkyl group having from 1 to 12 carbon atoms for reducing the steepness and response time of the liquid crystal composition.
A liquid crystal display device, comprising two spaced apart substances, at least one of which is transparent, the interior surfaces of the substrates having electrodes disposed thereon with a spacer between the substrates for forming an interior space between the substrates, a liquid crystal composition disposed in the space between the substrates, the liquid crystal composition comprising a nematic liquid crystal composition including at least one 2-phenylpyridine derivate having the following general formula:
- ##STR270## wherein Y' is RO--, Z' is a straight chain pentyl group and R is a straight chain alkyl group having from 1 to 12 carbon atoms.
2-phenylpyridine derivatives represented by the general formula:
- ##STR271## wherein Y is RO--, Z is a straight chain pentyl group, and R is a straight chain alkyl group having 2, 4, 5, 6 or 7 carbon atoms.
A nematic liquid crystal composition comprising an effective amount of at least one 2-phenylpyridine derivative having the general formula:
- ##STR272## wherein Y' is RO--, Z' is a straight chain pentyl group, and R is a straight chain alkyl group having 2, 4, 5, 6 or 7 carbon atoms for reducing the steepness and response time of the liquid crystal composition.
Dependencies are inferred from the claim text.