| Synthesis and Liquid Crystalline Properties of 3-Substituted Pentane-2,4-dione, Pyrazole and Isoxazole Derivatives |
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| 引用本文： | 韩杰 郭辉 王晓光 庞美丽 孟继本. Synthesis and Liquid Crystalline Properties of 3-Substituted Pentane-2,4-dione, Pyrazole and Isoxazole Derivatives[J]. 中国化学, 2007, 25(1): 129-131. DOI: 10.1002/cjoc.200790007 |
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| 作者姓名： | 韩杰 郭辉 王晓光 庞美丽 孟继本 |
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| 作者单位： | Department of Chemistry, Nankai University, Tianjin 300071, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Nos. 20402009 and 20372039）. |
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| 摘 要： | The γ-substituted β-diketonate 2,4-dioxo-3-pentyl 4-[4-（n-octyloxy）cinnamoyl]oxybenzoate 1 and its pyrazole and isoxazole derivatives （2 and 3 respectively） have been synthesized and characterized by the spectroscopic methods and elemental analysis. The mesogenic properties of these compounds have been studied by polarizing optical microscopy （POM） and differential scanning calorimetry （DSC）. A monotropic nematic mesophase was observed for the β-diketonate 1, in contrast, the pyrazole 2 displays an enantiotropic smectic A and isoxazole 3 exhibits an enantiotropic nematic mesophase. The relationship between the structure and liquid crystalline properties has also been discussed.
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| 关 键 词： | 合成 液晶性质 3-取代戊烷-2 4-二酮 β-二酮 吡唑 异噁唑 衍生物 |
| 修稿时间： | 2006-03-272006-09-15 |
Synthesis and Liquid Crystalline Properties of 3-Substituted Pentane-2,4-dione, Pyrazole and Isoxazole Derivatives |
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| HAN, Jie, GUO, Hui, WANG, Xiao-Guang, PANG, Mei-Li,MENG, Ji-Ben. Synthesis and Liquid Crystalline Properties of 3-Substituted Pentane-2,4-dione, Pyrazole and Isoxazole Derivatives[J]. Chinese Journal of Chemistry, 2007, 25(1): 129-131. DOI: 10.1002/cjoc.200790007 |
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| Authors: | HAN Jie GUO Hui WANG Xiao-Guang PANG Mei-Li MENG Ji-Ben |
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| Affiliation: | Department of Chemistry, Nankai University, Tianjin 300071, China |
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| Abstract: | The γ‐substituted β‐diketonate 2,4‐dioxo‐3‐pentyl 4‐[4‐(n‐octyloxy)cinnamoyl]oxybenzoate 1 and its pyrazole and isoxazole derivatives ( 2 and 3 respectively) have been synthesized and characterized by the spectroscopic methods and elemental analysis. The mesogenic properties of these compounds have been studied by polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). A monotropic nematic mesophase was observed for the β‐diketonate 1 , in contrast, the pyrazole 2 displays an enantiotropic smectic A and isoxazole 3 exhibits an enantiotropic nematic mesophase. The relationship between the structure and liquid crystalline properties has also been discussed. |
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| Keywords: | liquid crystal β‐diketonate pyrazole isoxazole |
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