| Budget Amount *help |
¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1987: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1985: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Research Abstract |
The following five series of benzene derivatives were found to exhibit hexagonal disordered columnar phases:N,N'-dialkanoy1-2,3,5,6-tetrakis- (alkanoyloxy)benzenes,N,N',N"-trialky1-1,3,5-benzenetricarboxamides, N,N',N"-trialkanoy1-2,4,6-trimethy1-1,3,5-benzenetriamines,N,N'-dialkanoyl- 2-methy1-1,3-benzenediamines,and N,N'-dialkanoy1-2,4-bis(alkanoyloxy)- 1,3-benzenediamines.Moreover,the series of N,N'-dialkanoy1-2,4,6-trimethy1- 1,3-benzenediamines,N,N'-dialkanoy1-2,3,5-trimethy1-1,4-benzenediamines, and N,N'-dialkanoy1-2,5,6-trimethy1-4-alkanoyloxy-1,3-benzenediamines were shown to be nematogenic.
In order study the effects of counter ion on the liquid crystalline properties of alkylammonium salts,the series of alkanesulfonates,benzenesulfonates carrying various substituents,and naphthalenesulfonates were prepared.The X-ray diffraction works on these salts revealed that their mesophases are of the smectic A type,but the seacking mode of ions depends on the kind of sulfonate ion.
Employing 4-(4'-substituted benzoyloxy)benzylideneanilines,the effects of chloro of methyl groups introduced to the neighboring positions in the aniline moiety on the clearing point were examined.The cumulative influence was observed when the substituents are located at 2 and 3 positions.
The three series of 2,5-bis(4-alkoxybenzylidene)cyclohexanones and related compounds were prepared.When the alkoxy groups are long enough,a smectic C phase appears and is transformed directly into an isotropic liquid.
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