| 热致液晶CPHOB的有序参数与核磁共振弛豫 |
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| 引用本文： | 孟庆安,胡传民,曹琪娟,李子荣.热致液晶CPHOB的有序参数与核磁共振弛豫[J].物理学报,1997,46(10):1961-1964. |
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| 作者姓名： | 孟庆安 胡传民 曹琪娟 李子荣 |
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| 作者单位： | 中国科学院物理研究所磁学国家重点实验室 |
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| 摘 要： | 从室温至380K测量了热致液晶4-己氧基苯甲酸4-氰基苯酯（CPHOB）的氢核磁共振谱．其固态至向列相的转变温度Tsn=347K，向列相至各向同性液体的转变温度Tni=359K．得到了液晶态有序参数的温度关系．讨论了氢核磁共振的自旋晶格弛豫机制．
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| 关 键 词： | 液晶 热致液晶 CPHOB 有序参数 核磁共振弛豫 |
| 收稿时间： | 1997-01-27 |
| 修稿时间： | 3/4/1997 12:00:00 AM |
ORDER PARAMETER AND NMR RELAXATION OF THERMOTROPIC LIQUID CRYSTAL CPHOB |
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| MENG QING-AN,HU CHUAN-MIN,CAO QI-JUAN and LI ZI-RONG.ORDER PARAMETER AND NMR RELAXATION OF THERMOTROPIC LIQUID CRYSTAL CPHOB[J].Acta Physica Sinica,1997,46(10):1961-1964. |
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| Authors: | MENG QING-AN HU CHUAN-MIN CAO QI-JUAN and LI ZI-RONG |
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| Abstract: | The proton magnetic resonance spectra of 4-cyanophenyl 4′-hexyloxy benzoate (CPHOB) were measured from room temperature to 380K. It was found that the transition temperature from solid to nematic phase was Tｓｎ=347K, and the transition temperature from nematic phase to isotropic liquid Tｎi=359K. The temperature dependence of its order parameter was evaluated. Its mechanism of proton spin lattice relaxation was discussed. |
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