Catalytic effect of rhodium(III) on the chemiluminescence of luminol in reverse micelles and its analytical application

Reversed Micellar Mediated Luminol Chemiluminescence Detection of Iron(II, III) Combined with On-Line Solvent Extraction Using 8-Quinolinol

“…On the other hand, the magnitude of the signal for the iron(III) complex in the reversed micellar solutions containing the basic solution of 1.0 M NaOH decreased to zero. Since the iron(III) ion is likely to hydrolyze in a basic medium 18 , the observed loss of its catalytic activity may be explained by assuming an effect of hydroxide formation in the water pools of reverse micelles, as reported for gold(III) 9 and rhodium(III) 10 in usual aqueous basic solutions. Thus, these observations imply that a competition among the two processes of the iron(III)-catalyzed luminol reaction and hydrolysis of iron(III) probably occurs following the decomposition of the complex in the reversed micellar medium of luminol.…”

“…[8][9][10][11] In our previous work 8 it was observed that the uptake of the iron(III) complex of 8-quinolinol (oxine), Fe(oxine) 3 , by a reverse micelle of cetyltrimethylammonium chloride (CTAC) into the water pool and its subsequent conversion into a reactive species, that is, iron(III) ion capable of catalyzing the CL reaction of luminol with hydrogen peroxide occur.…”

“…3,5 Although a CL emission from luminol oxidation catalyzed by metal ions and metalcontaining ions is well known in conventional or usual aqueous solution 6,7 , in reversed micellar solutions this is rarely reported. [8][9][10][11] In our previous work 8 it was observed that the uptake of the iron(III) complex of 8-quinolinol (oxine), Fe(oxine) 3 , by a reverse micelle of cetyltrimethylammonium chloride (CTAC) into the water pool and its subsequent conversion into a reactive species, that is, iron(III) ion capable of catalyzing the CL reaction of luminol with hydrogen peroxide occur.…”

“…We thus examined the development of a hybrid method based on the combination of the reversed micellar-mediated CL (RMM-CL) detection with solvent extraction for the determinations of iodine 13 , gold(III) 14,15 , and rhodium(III). 10 Furthermore, an online procedure for extraction via ion-pair formation followed by the RMM-CL detection was proposed for gold(III) determination using a reverse-flow injection (FI) system with a membrane filter for phase separation. 16 In this work, the luminol CL enhanced by the Fe(oxine) 3 complex in reverse micelles was investigated and on-line extraction through complex formation was combined with the RMM-CL reaction for the iron(III) determination using such a flow injection (FI) system.…”

Reversed Micellar-Mediated Luminol Chemiluminescence Reaction with Bis(acetylacetonato)oxovanadium(IV)

“…The center of the reversed micellar core which provides a unique and versatile reaction field, referred to as a microreactor 10 , is filled with water molecules surrounded by surfactant polar heads, while the hydrophobic chains are directed into the bulk non-polar organic phase. We have investigated a luminol CL emission enhanced by metal species such as iron(III) 11 , gold(III) 12 and rhodium(III) 13 in the reversed micellar water pools and its analytical application.…”