27Al NMR studies on the complexation of aluminum(III) with phosphinate and phosphite ions

Yoshinobu Miyazaki, Eishi Hiramatsu, Yoshinori Miura, Hirofumi Sakashita

研究成果: ジャーナルへの寄稿学術誌査読

5 被引用数 (Scopus)

抄録

The complex formation of aluminum(III) with phosphinate and phosphite ions in acidic solutions (pH 1-3) has been investigated by 27Al NMR spectroscopy. The formation of a 2:2 complex was established in addition to ordinary stepwise complexes in both Al3+-PH2O2- and -PHO32- systems. Formation constants of these complexes formed in both systems, and thermodynamic quantities for the complexation in the Al3+-PH2O2- system were determined at an ionic strength of 1.0 moldm-3 NaClO4. The stepwise complexation up to 1:3 becomes more exothermic and less entropy-productive in a regular manner. Both ΔH° and ΔS° values for the 2:2 complexation are quite large and positive due to the dimerization.

本文言語英語
ページ(範囲)2041-2045
ページ数5
ジャーナルPolyhedron
18
15
DOI
出版ステータス出版済み - 6月 11 1999

!!!All Science Journal Classification (ASJC) codes

  • 物理化学および理論化学
  • 無機化学
  • 材料化学

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