Enhanced chemiluminescence of peroxomonosulfate–cobalt (II) system in the presence of dicarboxylic acids |
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| Authors: | Yun Zhou Nobuaki Ogawa Jin‐Ming Lin |
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| Affiliation: | 1. Analysis Center and Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China;2. Faculty of Engineering and Resource Science, Akita University, Tegata Gakuencho, Akita 010‐8502, Japan |
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| Abstract: | In the present work, the effects of molecular mass aliphatic dicarboxylic acids on the HSO5‐–Co2+ chemiluminescence (CL) system were investigated. It was found that the aliphatic dicarboxylic acids could enhance the CL of the HSO5‐–Co2+ system. Moreover, the CL intensities improved regularly with increasing carbon chain length of the dicarboxylic acids. To investigate the CL enhancement mechanism, dynamic profiles, CL spectroscopy, ESR spectrum and the effects of various free radical scavengers on the CL system were employed. The results indicated that the enhancement of the CL should be attributed to the formation of peroxo‐diacid, which finally decomposed to the original dicarboxylic acid and singlet oxygen. The mechanism of the HSO5‐–Co2+‐dicarboxylic acid CL system was then proposed. Copyright © 2010 John Wiley & Sons, Ltd. Copyright © 2010 John Wiley & Sons, Ltd. |
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| Keywords: | chemiluminescence peroxomonosulfate aliphatic dicarboxylic acids singlet oxygen peroxo‐diacid |
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