The Catalysis of Cobalt(III) Complexes in the Chemiluminescent Reaction of Luminol

DOI Web Site Web Site 33 References Open Access
  • Kawata Yusuke
    Division of Human Environment, Graduate School of Human Development and Environment, Kobe University
  • Kodamatani Hitoshi
    Course of Earth and Environmental Science, Graduate School of Science and Engineering, Kagoshima University
  • Yamazaki Shigeo
    Department of Applied Science, Okayama University of Science
  • Saito Keiitsu
    Division of Human Environment, Graduate School of Human Development and Environment, Kobe University

Bibliographic Information

Other Title
  • ルミノールの化学発光反応におけるコバルト（ＩＩＩ）錯体の触媒作用
  • ルミノールの化学発光反応におけるコバルト(3)錯体の触媒作用
  • ルミノール ノ カガク ハッコウ ハンノウ ニ オケル コバルト 3 サクタイ ノ ショクバイ サヨウ

Search this article

Description

Chemiluminescence (CL) in a luminol-catalyst-hydrogen peroxide system is generally considered as follows. Luminol is oxidized with hydrogen peroxide in the presence of a catalyst, such as metal ions in a basic solution, generating a 6-membered peroxide intermediate. The 6-membered peroxide intermediate produces the excited-state aminophthalate. When this excited state decays to the ground state, emission is produced. In this study, twenty eight kinds of Co(III) complexes were synthesized and the catalysis of Co(III) complexes in the CL reaction of luminol with hydrogen peroxide was examined. The Co(III) complexes were categorized into 5 groups on the basis of the structure of the complexes, and the catalysis was evaluated with a 2-pump flow injection analysis (FIA) device. The extremely large differences in the chemiluminescence intensities were observed depending on the ligands. Among the Co(III) complexes examined, [Co(NO2)(NH3)5]Cl2 and [Co(CO3)(NH3)4]Cl showed remarkable catalysis. Therefore, the development of a sensitive analysis of hydrogen peroxide with FIA was attempted. The detection limits (S/N = 3) and the linear ranges were estimated under the most suitable detection conditions. The detection limits were of 0.2 nM (2 fmol) and 5 nM (50 fmol) for [Co(NO2)(NH3)5]Cl2 and [Co(CO3)(NH3)4]Cl, respectively. The calibration curves were linear up to 10 μM for both of these Co(III) complexes. The influence of foreign ions was examined in order to apply to measurements of hydrogen peroxide in real samples. Hydrogen peroxide in river water was successfully determined using the present method.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 59 (8), 665-671, 2010

    The Japan Society for Analytical Chemistry

References(33)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top