Physicochemical Properties of Aqueous Solutions from the Viewpoint of Cluster Structures Analyzed by Mass Spectrometry

  • Wakisaka Akihiro
    National Institute of Advanced Industrial Science and Technology (AIST), Research Institute for Environmental Management Technology, Environmental Molecular Science Group

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Other Title
  • 水溶液中のクラスター構造と物性に関する質量分析法による解析
  • 年間特集「水」 水溶液中のクラスター構造と物性に関する質量分析法による解析
  • ネンカン トクシュウ ミズ スイヨウエキ チュウ ノ クラスター コウゾウ ト ブッセイ ニ カンスル シツリョウ ブンセキホウ ニ ヨル カイセキ

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Description

Microscopic structures in aqueous alcohol and aqueous acid solutions were studied through mass spectrometric analyses of clusters generated by the fragmentation of liquid droplets. For water-alcohol binary mixtures, the self-association of alcohol molecules was found to be related to their physicochemical properties, such as the viscosity, phase separation and preferential solvation. The molecular self-association of alcohol induced by the coexistence of water was explained by the relativity of the intermolecular interaction energies led by the mixing of water with alcohol. For aqueous acid solutions, cluster structures in aqueous nitric acid, sulfuric acid and acetic acid solutions were found to reflect their acidity in water, that is, the ionization efficiency. Furthermore, the neutralization of acetic acid by sodium hydroxide to form sodium acetate was observed as a change of the cluster-level structure.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 59 (9), 743-758, 2010

    The Japan Society for Analytical Chemistry

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