| Synthesis
and Properties of Some Novel Liquid Crystals: Chiral 4′-(4-alkoxy-2,3-difluorobenzoyloxy)-4-biphenyl
Carboxylates |
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| 引用本文： | 胡刚,唐洪,徐寿颐.Synthesis
and Properties of Some Novel Liquid Crystals: Chiral 4′-(4-alkoxy-2,3-difluorobenzoyloxy)-4-biphenyl
Carboxylates[J].清华大学学报,2000,5(2):167-171. |
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| 作者姓名： | 胡刚 唐洪 徐寿颐 |
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| 作者单位： | HU Gang TANG Hong XU Shouyi Department of Chemistry，Tsinghua University，Beijing 100084，China |
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| 摘 要： | Introduction Mostpreviouslyreportedchiralliquidcrystalswerelaterallyunsubstitutedormono-substituted1].Certainlaterallydifluoro-substitutedsystems(ondifferentrings)haveanS*CAphase2].TheS*CSAS*AN*IsequencediscoveredinaTGBAsystembyBouchta3]wasduetolateralfluoro-substituents,whichsuggeststhatlateralfluoro-substitutentsdonotsimplylowerthemeltingpointsandcompresstheformationoftheunderlyingsmecticphases,butinfluencethemesomorphiccharactertoagreaterextent.Amongthesechiralliquidcrystals,th…
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Synthesis and Properties of Some Novel Liquid Crystals: Chiral 4'-(4-alkoxy-2,3-difluorobenzoyloxy)-4-biphenyl Carboxylates |
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| HU Gang,TANG Hong,XU Shouyi.Synthesis and Properties of Some Novel Liquid Crystals: Chiral 4'-(4-alkoxy-2,3-difluorobenzoyloxy)-4-biphenyl Carboxylates[J].Tsinghua Science and Technology,2000,5(2):167-171. |
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| Authors: | HU Gang TANG Hong XU Shouyi |
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| Abstract: | A series of laterally o-difluoro-substituted chiral liquid crystals, S(+)-2-methyl-1-butyl 4'-(4-alkoxyl-2, 3-difluoro)benzoyloxy]-4-biphenyl carboxylates, have been synthesized using a simple process. Their molecular structures were determined using IR, NMR, MS, and EA. Their transition temperatures were measured using DSC(Differential Scanning Calorimeter). All of the compounds exhibit the N* phase and their clearing points vary regularly with the increase in the number of terminal group carbons. The influence of lateral fluoro-substituents on the properties was also investigated. |
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| Keywords: | liquid crystal lateral fluorination chiral liquid crystal |
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