Carbon dioxide-enhanced luminol chemiluminescence in the absence of added oxidant

Lan, Zhang-Hua; Mottola, Horacio A.

doi:10.1039/an9962100211

Cited by 44 publications

(36 citation statements)

References 30 publications

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“…16 For the usual aqueous phase CL reactions of luminol, several 69 ANALYTICAL SCIENCES JANUARY 2006, VOL. 22 similar observations of the carbonate or CO2(aq) enhancement effect on CL have been also reported [33][34][35] and a plausible mechanism involving the reaction between the superoxide radical, O2 -·, and CO2(aq) to form the peroxycarbonate radical, CO4 -·, which is an effective oxidant of luminol, was proposed. 35 In addition, it was presumed that enhancement of CL by addition of cationic normal micellar solutions involves a more efficient reaction with the O2 -· radical in the Stern region of the micelles.…”

Section: Optimization Studies Effect Of Base Concentration On the CL supporting

confidence: 51%

An Improved Method for the Flow-Injection Determination of Iodine Using the Luminol Chemiluminescence Reaction in a Reversed Micellar Medium of Cetyltrimethylammonium Chloride in 1-Hexanol-Cyclohexane

et al. 2006

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Amphiphilic molecules (surfactants) when dissolved in a bulk organic non-polar solvent form organized assemblies called reverse micelles when an appropriate concentration of surfactants, the critical micellar concentration, is reached. 1 The structure of a reverse micelle is the inverse prototype of the normal micellar structure. The polar head groups of the surfactant molecules are in contact with the tiny water pool (containing the associated counter ions) in the core of the reverse micelle while the hydrophobic chains are directed outward into the bulk organic solvent. In our previous work, chemiluminescence (CL) generation was observed upon mixing iodine with luminol dispersed in the carbonate-buffered water pool of the reversed micelle of cetyltrimethylammonium chloride (CTAC). 2 Absorption measurements demonstrated that, on mixing of the cyclohexane solution of iodine with the CTAC reversed micellar solution, iodine could be transferred instantly and completely from the organic phase into the buffered water pool of the reverse micelle.2 On the other hand, when iodine was premixed with the reversed micellar solution containing the carbonate buffer alone and then the resulting mixture was mixed with the reversed micellar solution of luminol, no CL emission was produced. 3 In the CL reaction of luminol with iodine, hypoiodous acid and the iodite ion have been proposed as oxidants in usual alkaline aqueous solutions. 4 Thus, a possible explanation would be that, on iodine uptake by the reverse micelle, these oxidizing agents may be produced initially and be present transiently at the surfactant-water pool interface, before reacting immediately with luminol anion to generate luminescence. 2,3 The chloride ion, the counter ion of CTAC, is also presumed to be available mostly at the surfactant-water pool interface, 5 and to cause its association with iodine. 6 This might facilitate the quantitative uptake of iodine by the CTAC reverse micelle. In addition, the concentration effect of iodine can be achieved by entrance of iodine into a small volume of the interfacial region in the CTAC reverse micelles, where acceleration of the luminol CL reaction seems likely due to more efficient association of luminol with the generated oxidants, resulting in the generation of more intense or higher CL signals.Several metal ions present in aqueous samples may interfere with iodine determination by using the usual aqueous phase luminol CL reaction; thus, their removal is needed by incorporating separation science techniques into the procedure. 7 When iodide is oxidized into iodine, since iodide is not CLactive, subsequent separation from the oxidant used which could interfere with the CL determination is also required. 2,3,8 One of the effective methods of preconcentration and separation of iodine from such interferents as oxidant and metallic species is its extraction with a suitable organic solvent. Yasuda Women's College, Yasuhigashi, Japan To eliminate the use of chlorinated hydrocarbons, we have improved the method for...

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Section: Optimization Studies Effect Of Base Concentration On the CL supporting

confidence: 51%

An Improved Method for the Flow-Injection Determination of Iodine Using the Luminol Chemiluminescence Reaction in a Reversed Micellar Medium of Cetyltrimethylammonium Chloride in 1-Hexanol-Cyclohexane

et al. 2006

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“…Lan et al [21] proposed that H 2 O 2 formed from dissolved O 2 may react with CO 2 to produce carbonate radicals (ÁCO À 3 ), which are responsible for the enhancing effect owing to their selective oxidation of luminol to afford luminol radical (ÁL À ). A similar mechanism was also suggested by Yeh et al [25].…”

Section: Mechanism Explorationmentioning

confidence: 99%

“…Moreover, by comparing the spectrum of Fig. 8 parts 1 at higher concentration level that quenches the CL reaction [21].…”

Section: Mechanism Explorationmentioning

confidence: 99%

“…Some heavy metal ions, peroxidases, and certain fluorescent dyes like fluorescein (FH 2 ) are often used to accelerate the reaction for light emission in an alkaline buffer [17,23]. Factors such as pH of the medium, dissolved oxygen [24], and carbon dioxide [20][21][22] also affect the reaction remarkably.…”

Section: Mechanism Explorationmentioning

confidence: 99%

“…No CL system has been applied to the determination of TIC or TOC. In the works of Lan et al [20,21] and Xiao et al [22], the enhancement effect of CO 2 or CO 2À 3 on the CL reaction of H 2 O 2 -luminol was investigated in the presence of heavy metal ions, thereby CL methods for the determination of CO 2 and Co 2+ were developed, respectively. The former method was applied to the determination of CO 2 in atmospheric air and human breath.…”

Section: Introductionmentioning

confidence: 99%

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Flow-injection analysis for the determination of total inorganic carbon and total organic carbon in water using the H2O2–luminol–uranine chemiluminescent reaction

Fan

Zhao

et al. 2006

Anal Bioanal Chem

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In the presence of carbonate and uranine, the chemiluminescent intensity from the reaction of luminol with hydrogen peroxide was dramatically enhanced in a basic medium. Based on this fact and coupled with the technique of flow-injection analysis, a highly sensitive method was developed for the determination of carbonate with a wide linear range. The method provided the determination of carbonate with a wide linear range of 1.0×10−10 -5.0×10 −6 mol L −1 and a low detection limit (S/N=3) of carbonate of 1.2×10 −11 mol L −1 . The average relative standard deviation for 1.0×10 −9 -9.0×10 −7 mol L −1 of carbonate was 3.7% (n=11). Combined with the wet oxidation of potassium persulfate, the method was applied to the simultaneous determination of total inorganic carbon (TIC) and total organic carbon (TOC) in water. The linear ranges for TIC and TOC were 1.2×10 −6 -6.0×10 −2 mg L −1 and 0.08-30 mg L −1 carbon, respectively. Recoveries of 97.4-106.4% for TIC and 96.0-98.5% for TOC were obtained by adding 5 or 50 mg L −1 of carbon to the water samples. The relative standard deviations (RSDs) were 2.6-4.8% for TIC and 4.6-6.6% for TOC (n = 5). The mechanism of the chemiluminescent reaction was also explored and a reasonable explanation about chemical energy transfer from luminol to uranine was proposed.

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Amplified Peroxidase‐like Activity of Co²⁺ Using 8‐Hydroxyquinoline and Its Application for Ultrasensitive Colorimetric Detection of Clioquinol

Sai

Xue

et al. 2021

Chemistry An Asian Journal

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8‐Hydroxyquinoline (8HQ) and its derivatives display diverse bioactivities and therapeutic potentials. In this study, we unveiled that 8HQ can boost the peroxidase‐like activity of Co2+ in the presence of bicarbonate (HCO3−) in neutral pH at room temperature. With 2,2′‐azino‐bis‐(3‐ethylbenzothiazoline‐6‐sulphonate) (ABTS) as the substrate, the formed Co2+/8HQ/HCO3− complex shows robust catalytic activity with the turnover number (kcat) tens to hundreds of times higher than that of Co3O4 and other Co2+ complexes in terms of per cobalt ion. This system was used to design colorimetric sensors for ultrasensitive detection of 8HQ‐based drugs by activating the activity of Co2+. Take detecting clioquinol as an example, a detection limit of 2.4 nM clioquinol with a linear range from 0.01 to 0.2 μM was obtained. This work not only revealed a new kind of ligand that activated the activity of Co2+, but also provided a facile, low‐cost, ultrasensitive, easy‐to‐use, and universal strategy for sensing various 8HQ‐based drugs. Further development of this catalytic system might be beneficial to overcome drug resistance by combined medication.

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Carbon dioxide-enhanced luminol chemiluminescence in the absence of added oxidant

Cited by 44 publications

References 30 publications

An Improved Method for the Flow-Injection Determination of Iodine Using the Luminol Chemiluminescence Reaction in a Reversed Micellar Medium of Cetyltrimethylammonium Chloride in 1-Hexanol-Cyclohexane

An Improved Method for the Flow-Injection Determination of Iodine Using the Luminol Chemiluminescence Reaction in a Reversed Micellar Medium of Cetyltrimethylammonium Chloride in 1-Hexanol-Cyclohexane

Flow-injection analysis for the determination of total inorganic carbon and total organic carbon in water using the H2O2–luminol–uranine chemiluminescent reaction

Amplified Peroxidase‐like Activity of Co²⁺ Using 8‐Hydroxyquinoline and Its Application for Ultrasensitive Colorimetric Detection of Clioquinol

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Carbon dioxide-enhanced luminol chemiluminescence in the absence of added oxidant

Cited by 44 publications

References 30 publications

An Improved Method for the Flow-Injection Determination of Iodine Using the Luminol Chemiluminescence Reaction in a Reversed Micellar Medium of Cetyltrimethylammonium Chloride in 1-Hexanol-Cyclohexane

An Improved Method for the Flow-Injection Determination of Iodine Using the Luminol Chemiluminescence Reaction in a Reversed Micellar Medium of Cetyltrimethylammonium Chloride in 1-Hexanol-Cyclohexane

Flow-injection analysis for the determination of total inorganic carbon and total organic carbon in water using the H2O2–luminol–uranine chemiluminescent reaction

Amplified Peroxidase‐like Activity of Co2+ Using 8‐Hydroxyquinoline and Its Application for Ultrasensitive Colorimetric Detection of Clioquinol

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About

Amplified Peroxidase‐like Activity of Co²⁺ Using 8‐Hydroxyquinoline and Its Application for Ultrasensitive Colorimetric Detection of Clioquinol