物理化学学报 >> 1985, Vol. 1 >> Issue (05): 404-411.doi: 10.3866/PKU.WHXB19850502

研究论文 上一篇    下一篇

N-取代苯基氨基乙酸乙酯的紫外光谱研究

陈荣悌; 朱志昂; 张一宝; 吴莉   

  1. 南开大学化学系
  • 收稿日期:1984-11-30 修回日期:1985-02-21 发布日期:1985-10-15

INVESTIGATION OF ULTRAVIOLET SPECTRA ON N-(SUBSTITUTED-PHENYL)-ETHYLGLYCINATES

Chen Rongti; Zhu Zhiang; Zhang Yibao; Wu Li   

  1. Department of Chemistry, Nankai University, Tianjin
  • Received:1984-11-30 Revised:1985-02-21 Published:1985-10-15

摘要: 本文用贝克曼DU-8B型分光光度计测量了N-取代苯基氨基乙酸乙酯(RPhGEt, R=p-OCH_3, p-CH_3, p-Cl, p-NO_2,-H, m-OCH_3, m-Cl, m-NO_2, m-CH_3)在水、二氧六圜。二氧六圜-水, 乙醇、乙酸乙酯、正庚烷、苯等溶剂中的紫外光谱。从实验结果发现, 在各溶剂中RPhGEt的紫外吸收频率, ~νI分别与偶极矩μ, 取代常数α’、碱性强度pK_2之间均存在着较好的直线关系。此外还研究了溶剂对~vI的影响, 得到RPhGEt的~νI值与溶剂的(n~2-1)/(n~2+2)之间有较好的直线关系。

Abstract: The ultraviolet spectra of N-(substituted phenyl)-ethylglycinates (RPhGEt, R=p-OCH_3, p-CH_3, m-CH_3, -H, m-OCH_3, m-Cl, p-Cl, m-NO_2, p-NO_2) have been determened in water, dioxane, dioxane-water, ethyl alcohol, ehtyl ester, heptane and benzene by means of a Baokmann DU-8B spectrophotometer. The experimental results showed that:
(1) The bathochromic shift of ultraviolet absorption spectra of RPhGEt in various solvents was observed to compare with the characterized absorption hands of benzene. The energy difference between ground state and first excited state of RPhGEt followed the order:
p-OCH_3(2) ...