| N-取代苯氨基乙酸的紫外光谱研究 |
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| 引用本文： | 朱志昂,张一宝,王芳,陈荣悌. N-取代苯氨基乙酸的紫外光谱研究[J]. 物理化学学报, 1987, 3(1): 67-73. DOI: 10.3866/PKU.WHXB19870112 |
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| 作者姓名： | 朱志昂 张一宝 王芳 陈荣悌 |
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| 作者单位： | Department of Chemist; Nankai University Tianjin; The People's Republic of China |
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| 摘 要： | 本文测量了N~-取代苯氨基乙酸(RPhG,R=p-OCH_3,p-CH_3,m-CH_3,-H,m-OCH_3,p-Cl,m-Cl,m-NO_2,p-NO_2)在正己烷、正庚烷、二氧六环、四氯化碳、苯、甲苯、氯笨、乙酸乙酯、乙醇、乙腈、30％乙醇-水、不同比例的乙醇-正庚烧等溶剂中的紫外吸收光谱。实验结果显示:(1)与苯相比, RPhG在各溶剂中的紫外吸收峰均发生红移。(2)RPhG在各溶剂中的第一吸收谱带吸收频率ν与RPhG的碱性强度pK_2值、理论计算的电子跃迁能ΔE之间呈较好的直线关系。(3)在非极性溶剂中, RPhG的ν值与溶剂特性函数f(n~2)之间呈直线关系。在极性溶剂中, ν与溶剂特性函数f(ε)之间呈直线关系, [ν-(AL_0+B)f(n~2)]与溶剂特性函数φ(ε)-φ(n~2)之间也呈直线关系。(4)在不同溶剂中, 同一取代基RPhG的ν~R对未取代PhG的ν~H之间存在着线性关系。
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| 收稿时间： | 1985-08-24 |
| 修稿时间： | 1986-04-21 |
ULTRAVIOLET SPECTRA OF N-SUBSTITUTED PHENYLGLYCINES |
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| Zhu Zhiang,Zhang Yibao,Wang Fang,Chen Yunti. ULTRAVIOLET SPECTRA OF N-SUBSTITUTED PHENYLGLYCINES[J]. Acta Physico-Chimica Sinica, 1987, 3(1): 67-73. DOI: 10.3866/PKU.WHXB19870112 |
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| Authors: | Zhu Zhiang Zhang Yibao Wang Fang Chen Yunti |
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| Affiliation: | Department of Chemist; Nankai University Tianjin; The People's Republic of China |
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| Abstract: | The ultraviolet spectra of N-substituted phenylglycines (RPhG, R= p-OCH_3, p-CH_3 m-CH_3,-H, m-OCH_3, p-Cl, m-Cl, m-NO_2, p-NO_2) have been studied in n-hexane, n-heptane, dioxane, carbon tetrachloride, benzene, mehtylbenzene, diethyl ether, chlorobenzene,ethyl acetate, ethanol,acetonitrile, 30% ethanol-water, in different ratios of ethanol-n-heptane mixtures by means of Beckman DU-8 Spectrophotometer. The experiment results showed that 1. To compare with the characterized absorption bands of benzene, the bath-ochromic shift of ultraviolet absorption spectra of RPhG in varous solvents was observed. The energy difference between ground state and first excited state of RPhG followed the orderp-OCH_3m-NO_2In 30% ethanol-water the order appeared to be p-NO_2
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