| Spectrophotometric determination of acidity constants of 4-(2′-thiazolylazo)-resorcinol (TAR) in water-organic mixtures |
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| 引用本文： | Ali Benvidi,Fatemeh Heidari,M.Mazloum Ardakani,Ali Mohammad Hajishabani,Jahanbakhsh Ghasemi. Spectrophotometric determination of acidity constants of 4-(2′-thiazolylazo)-resorcinol (TAR) in water-organic mixtures[J]. 中国化学快报, 2010, 21(6): 725-729. DOI: 10.1016/j.cclet.2010.01.015 |
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| 作者姓名： | Ali Benvidi Fatemeh Heidari M.Mazloum Ardakani Ali Mohammad Hajishabani Jahanbakhsh Ghasemi |
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| 作者单位： | a Department of Chemistry, Yazd University, Yazd, Iran;b Department of Chemistry, Khajeh Nasir Toosi University of Technology, Iran |
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| 摘 要： | <正>The acidity constants of TAR in different water-organic solvent binary mixtures at 25℃have been determined spectrophotometrically. DATa ANalysis(DATAN) program was used for calculations of the acidity constants and pure spectra of all formed species and their concentration distribution diagram in applied pH interval.Results show that there are a fairly inverse relationship between acidity constants and the mole fraction of the organic solvent in the binary mixtures.Effects of solvent composition on the pK_as and pure spectrum of each component are also discussed.
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| 收稿时间： | 2009-09-15 |
Spectrophotometric determination of acidity constants of 4-(2'–thiazolylazo)- resorcinol (TAR) in water-organic mixtures |
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| Ali Benvidi,Fatemeh Heidaria,M.Mazloum Ardakania,Ali Mohammad Hajishabania,Jahanbakhsh Ghasemib a. Spectrophotometric determination of acidity constants of 4-(2'–thiazolylazo)- resorcinol (TAR) in water-organic mixtures[J]. Chinese Chemical Letters, 2010, 21(6): 725-729. DOI: 10.1016/j.cclet.2010.01.015 |
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| Authors: | Ali Benvidi Fatemeh Heidaria M.Mazloum Ardakania Ali Mohammad Hajishabania Jahanbakhsh Ghasemib a |
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| Affiliation: | a Department of Chemistry, Yazd University, Yazd, Iran;b Department of Chemistry, Khajeh Nasir Toosi University of Technology, Iran |
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| Abstract: | The acidity constants of TAR in different water-organic solvent binary mixtures at 25℃ have been determined spectro-photometrically. DATa Analysis (DATAN) program was used for calculations of the acidity constants and pure spectra of all formed species and their concentration distribution diagram in applied pH interval. Results show that there are a fairly inverse relationship between acidity constants and the mole fraction of the organic solvent in the binary mixtures. Effects of solvent composition on the pKas and pure spectrum of each component are also discussed. |
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| Keywords: | TAR DATAN Principal component analysis Acidity constants Binary solvents |
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