| 苯甲酸脱羧反应过程的拉曼光谱研究 |
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| 引用本文： | 王世霞,郑海飞.苯甲酸脱羧反应过程的拉曼光谱研究[J].光谱学与光谱分析,2009,29(12). |
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| 作者姓名： | 王世霞 郑海飞 |
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| 作者单位： | 北京大学造山带与地壳演化教育部重点实验室,北京,100871 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 应用水热金刚石压腔结合拉曼光谱技术研究了升温过程中苯甲酸在水中的变化及拉曼谱图.结果表明:低温升温过程中,苯甲酸的拉曼谱图中各个特征振动谱峰没有变化,苯甲酸没有与水反应.随着温度的继续升高,苯甲酸的拉曼谱图中的特征振动峰逐渐变弱.升至150℃时,羧幕的拉曼特征谱峰消失,说明此过程中苯甲酸发生了脱羧反应.继续升温至170℃,苯甲酸溶解消失.随后将体系降至常温,发现有晶体析出.由其拉曼谱图可知,重结晶的晶体含有苯环的特征峰,说明有芳香烃析出.但是没有测到羧皋的特征拉曼谱峰,说明重结晶的晶体不是苯甲酸.整个过程可以说明,芳香烃在溶解重结晶过程中是可逆的,羧基是不可逆的.
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| 关 键 词： | 苯甲酸 溶解 重结晶 脱羧反应 |
Research on Raman Spectra of Benzoic Acid during Decarboxylic Process |
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| WANG Shi-xia,ZHENG Hai-fei.Research on Raman Spectra of Benzoic Acid during Decarboxylic Process[J].Spectroscopy and Spectral Analysis,2009,29(12). |
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| Authors: | WANG Shi-xia ZHENG Hai-fei |
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| Institution: | WANG Shi-xia,ZHENG Hai-feiKey Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,Peking University,Beijing 100871,China |
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| Abstract: | The present research studied benzoic acid change in water and its Raman spectra in temperature rising period using hydrothermal diamond anvil cell and Raman spectrum technique.The hydrothermal diamond anvil cell is the most useful instrument to observe sample in-situation under high temperature and high pressure.The authors can get effective results from this instrument and pursue further research.The method of Raman spectra is the most useful measure tool and it can detect the material according to the spe... |
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| Keywords: | Benzoic acid Dissolution Recrystallization Decarboxylation |
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