| 四氢咔唑酮离解常数的光度法测定 |
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| 引用本文： | 张淑芳,张晓燕.四氢咔唑酮离解常数的光度法测定[J].化学试剂,2009,31(2). |
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| 作者姓名： | 张淑芳 张晓燕 |
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| 作者单位： | 曲阜师范大学化学科学学院,山东,曲阜,273165 |
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| 基金项目： | 国家自然科学基金，曲阜师范大学基金 |
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| 摘 要： | 研究了四氢咔唑酮在不同比例的乙醇.水混合溶剂中及不同酸度下的吸收光谱,提出了采用紫外分光光度法测定四氢咔唑酮在水中离解常数的方法.试验证明:在不同比例的乙醇.水混合溶剂中,四氢咔唑酮的离解常数与乙醇的体积分数存在良好的线性关系,通过外推至乙醇含量为零,可求得在实验条件下四氢咔唑酮在水溶液中的离解常数pKb为14.04.
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| 关 键 词： | 光度法 离解常数 四氧咔唑酮 |
Spectroscopic determination and theoretical calculation of the dissociation constant of 4-hydroxy carbazole |
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| ZHANG Shu-fang,ZHANG Xiao-yan.Spectroscopic determination and theoretical calculation of the dissociation constant of 4-hydroxy carbazole[J].Chemical Reagents,2009,31(2). |
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| Authors: | ZHANG Shu-fang ZHANG Xiao-yan |
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| Affiliation: | College of Chemistry;Qufu Normal University;Qufu 273165;China |
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| Abstract: | The dissociation constant of 4-hydroxy carbazole was determined by the spectrophotometric method based on the absorption spectra of 4-hydroxy carbazole at different pH values in an ethanol-water mixed solvent.The results showed that the pKb was a good linear function of the volume fraction of ethanol in the concentration range studied.The dissociation constant of 4-hydroxy carbazole in water was determined to be 14.04 by means of extrapolation to a zero concentration of ethanol under the specified condition... |
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| Keywords: | spectrophotometry dissociation constant 4-hydroxy carbazole |
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