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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．
The hydrogen nuclear magnetic resonance spectrum of the 4-cyanoacetophenone 4-cyanobenzoate (CPHOB) was measured from room temperature to 380K. Its transition temperature from solid to nematic phase is Tsn = 347K, and the transition temperature from nematic phase to isotropic liquid is Tni = 359K. The temperature dependence of ordered parameters of the liquid crystal is obtained. The spin lattice relaxation mechanism of hydrogen nuclear magnetic resonance is discussed.