Catalytic behavior of tris(2,2 '-bipyridine)iron(II) complex in chemiluminescence reaction of luminol in reversed micellar medium of cetyltrimethylammonium chloride

Fujiwara Terufumi

Mohammadzai Imdad U.

Kitayama Keizo

Funazumi Yoshimoto

Kumamaru Takahiro

Journal of Colloid and Interface Science

Tris(2,2′-bipyridine) complex of iron(II) was found to cause an increase in the chemiluminescence (CL) emission of luminol dispersed in the reversed micellar medium of cetyltrimethylammonium chloride (CTAC) in 1:1 (v/v) dichloromethane-cyclohexane/water, when the iron(II) complex in dichloromethane was mixed directly with the reversed micellar solution containing luminol. Visible absorption measurements showed that, when dispersed in the CTAC reversed micellar medium, the iron(II) complex dissociates easily. In the reverse micelle, subsequently the free iron(II) ion produced may catalyze the CL oxidation of luminol even in the absence of hydrogen peroxide. The CL emission produced under the optimized experimental conditions was detectable at a minimum iron(II) concentration of 1.0 × 10-9 M using a flow injection system.

Cetyltrimethylammonium chloride

Dissociation

Luminol chemiluminescence

Reversed micellar medium

Tris(2,2′-bipyridine)iron(II) complex

Chemistry [ 430 ]

eng

Elsevier Inc.

Copyright (c) 2007 Elsevier Inc.

[ISSN] 0021-9797

[DOI] 10.1016/j.jcis.2007.01.077

[NCID] AA00695804

[DOI] http://dx.doi.org/10.1016/j.jcis.2007.01.077 isVersionOf