Chemiluminescence of the peroxomonosulphate–cobalt(II)–aliphatic monocarboxylic acids system

Abstract

A weak chemiluminescence (CL) emission was observed due to the production of singlet oxygen ((1)O(2)) during the decomposition of peroxomonosulphate (HSO(5)(-)) catalysed by cobalt(II). Low molecular mass aliphatic monocarboxylic acids, such as formic, acetic, propionic, butyric and valeric acids, influenced the CL emission, and the reaction of aliphatic monocarboxylic acids with HSO(5)(-)/Co(2+) solution was further investigated using a flow injection analysis (FIA) CL method. The results indicated that the CL intensities of aliphatic monocarboxylic acids were improved with increase in the carbon chain length in the potassium peroxomonosulphate-cobalt(II) sulphate system. Generation of singlet oxygen was confirmed by the fact that the CL emission of aliphatic monocarboxylic acids with the HSO(5)(-)/Co(2+) solution was quenched by NaN(3), and from the CL spectrum of the reaction system. Additionally, a possible mechanism of aliphatic monocarboxylic acids CL emission enhancement was proposed.

Enhanced chemiluminescence of peroxomonosulfate–cobalt (II) system in the presence of dicarboxylic acids

“…As reported in our earlier research, hydrocarbons, like low molecular mass aliphatic monocarboxylic acids (formic, acetic, propionic, butyric and valeric acids), improved the CL emission of the HSO 5 ‐ –Co 2+ system dramatically (3). In the present study, to further investigate the influence of aliphatic acids on the HSO 5 ‐ –Co 2+ CL system, the CL of the interaction of low molecular mass aliphatic dicarboxylic acids with the HSO 5 ‐ –Co 2+ system was first investigated.…”

“…1, sample solution (labeled as S, with 1.2 mL/min sample rate) was delivered by the pump P1 and then mixed with the solution of 4.0 × 10 −3 mol/L KHSO 5 and 1.0 × 10 −2 mol/L CoSO 4 by means of a six‐way valve and finally flowed into in the flow CL cell. The CL signal reached its maximum at about 3 min after the mixing, which means that a 20 cm mixing tube was enough to optimize the mixing degree (3). The CL intensity vs time curve was recorded consecutively by workstation, and the CL intensity of KHSO 5 and CoSO 4 mixture solution without sample injection was recorded as blank signal.…”

“…KHSO 4 . K 2 SO 4 ), which is prepared by the reaction of 86% H 2 O 2 with concentrated H 2 SO 4 , followed by neutralization with K 2 CO 3 (3). KHSO 5 is also used as an oxidant in a wide range of oxidations such as oxidizing alcohols, ketones, carboxylic acids, alkenes, phenols, amines and sulfides (4).…”

Ultra-sensitive immunosensor for detection of hepatitis B surface antigen using multi-functionalized gold nanoparticles

“…Therefore, this was selected as optimum catalyst concentration. Also, comparison between the effects of different catalysts at their optimized concentration (HAuCl 4 1.0 Â 10 À3 %W/V, DPC [1] 10 À5 M, Hb [27] 100 mg mL À1 , and CoCl 2 [45] 0.01 M) on the chemiluminescence intensity of biotin-GNP-luminol revealed HAuCl 4 as the best catalyst (Fig. 4B) since it had the strongest catalytic effect on the luminol-H 2 O 2 chemiluminescence [38].…”

Determination of folic acid by chemiluminescence based on peroxomonosulfate-cobalt(II) system

“…From the chemiluminescence (CL) kinetic curve, a weak luminescence was yielded when the CoSO 4 , Co(NO 3 ) 2 and CoCl 2 solution was added to PMS solution, which would be the blank of determination of PGA in this system. There was a strong CL when the cobalt acetate (CoAc 2 ) solution was added to PMS solution, whose blank would be too high to suit for CL analysis, because aliphatic monocarboxylic acids, such as acetic and butyric, were found to enhance the CL emission generation from the PMS/CoSO 4 reaction [15]. A very strong luminescence was given after the adding of the solution of 10 −6 mol L −1 PGA to the mixing solution of PMS and Co(II) except PMS/CoCl 2 solution whose intensity as low as its blank.…”