| 吡啶酮系偶氮染料腙式—偶氮式互变异构的研究——Ⅰ核磁共振波谱在构型测定中的应用 |
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| 引用本文： | 彭勤纪,张明嘉,李慕洁,高昆玉,程侣柏.吡啶酮系偶氮染料腙式—偶氮式互变异构的研究——Ⅰ核磁共振波谱在构型测定中的应用[J].波谱学杂志,1989(2). |
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| 作者姓名： | 彭勤纪 张明嘉 李慕洁 高昆玉 程侣柏 |
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| 作者单位： | 大连理工大学化工学院
(彭勤纪，张明嘉，李慕洁，高昆玉)，大连理工大学化工学院(程侣柏) |
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| 摘 要： | 测定了七个吡啶酮系偶氮染料的~(13)C NMR波谱.借助于选择性非灵敏核极化转移增强法(SELINEPT)完成了谱带归属。从pH值对~(13)C化学位移的影响,~1H NMR谱和紫外-可见吸收光谱,指出这类染料的酸-碱变色现象是由腙式和偶氮式构型互变平衡的移动引起的.介质酸性或碱性的增强分别有利于染料以腙式或偶氮式的构型存在.不同结构的吡啶酮染料,其变色pH值是相当不同的.
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| 关 键 词： | NMR波谱 吡啶酮系偶氮染料 腙式-偶氮式互变异构平衡 选择性灵敏核极化转移增强法 |
INVESTIGATION OF HYDRAZONE-AZO TAUTOMERISM OF PYRIDONE AZO DYESTUFFS I The Application of Nuclear Magnetic Resonance For Identification of the Configurations |
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| Peng Qingji Zhang Mingjia Li Mujie Gao Kunyu and Cheng Lubai.INVESTIGATION OF HYDRAZONE-AZO TAUTOMERISM OF PYRIDONE AZO DYESTUFFS I The Application of Nuclear Magnetic Resonance For Identification of the Configurations[J].Chinese Journal of Magnetic Resonance,1989(2). |
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| Authors: | Peng Qingji Zhang Mingjia Li Mujie Gao Kunyu and Cheng Lubai |
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| Abstract: | The 13C NMR spectra of seven azo dyes derived from pyridones were measured. The assignment of the peaks was carried out with the aid of Selective Insensitive Nuclear Enhanced by Polarization Transfer technique ( SELINEPT). It has been pointed out that the phenomenon of colour-change caused by acid-base is due to the shift of equilibrium in hydrazone-azo tautomerism according to the influence of pH values upon 13C chemical shifts, 1H NMR spectra and UV-VIS absorption spectra. The enhancement of acidity and basicity is in favour of hydrazone and azo forms respectively. The different structures of the pyridone dyes change their colour at quite different pH values. |
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| Keywords: | NMR spectrum pyridone azo dyes Tautomerism of hydrazonc - azo forms Selective Insensitive Nuclear Enhanced by Polarization Transfer (SELINEPT) |
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