Coupled redox and complex formation processes as a kinetic fluorimetric method for the determination of cobalt

Sánchez, Francisco; Navas, A.; Laserna, J.J.; Barrera, M. R. Martinez de la

doi:10.1007/bf00493793

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…Some fluorimetric methods [204][205][206][207][208][209] for the determination of cobalt were based on its fluorescence reactions with fluorophores and oxidizing agents such as hydrogen peroxide [205][206][207][208][209] and bromate. 204 These oxidization reactions can be divided into two types: one is the cobalt-catalytic oxidation of reduced fluorescein 206 or spiro form fluorescein-hydrazide 207 with hydrogen peroxide; the other is the oxidation of a ligand (PAPH, 204 p-hydroxy-2anilinopyridine, 205 APTSQ, 208 CPBSQ and FCPBSQ 209 ) to a fluorescent product as the complex formation with cobalt ions. These proposed methods can output ''turn-on'' fluorescence signals and show high sensitivity (the detection limit was at the nM ng À1 mL À1 level); however, oxidizing agents and the basic medium are required.…”

Section: Cobaltmentioning

confidence: 99%

Fluorescent, MRI, and colorimetric chemical sensors for the first-row d-block metal ions

et al. 2015

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Transition metals (d-blocks) are recognized as playing critical roles in biology, and they most often act as cofactors in diverse enzymes; however, improper regulation of transition metal stores is also connected to serious disorders. Therefore, the monitoring and imaging of transition metals are significant for biological research as well as clinical diagnosis. In this article, efforts have been made to review the chemical sensors that have been developed for the detection of the first-row d-block metals (except Cu and Zn): Cr, Mn, Fe, Co, and Ni. We focus on the development of fluorescent sensors (fall into three classes: "turn-off", "turn-on", and ratiometric), colorimetric sensors, and responsive MRI contrast agents for these transition metals (242 references). Future work will be likely to fill in the blanks: (1) sensors for Sc, Ti, and V; (2) MRI sensors for Cr, Mn, Co, Ni; (3) ratiometric fluorescent sensors for Cr(6+), Mn(2+), and Ni(2+), explore new ways of sensing Fe(3+) or Cr(3+) without the proton interference, as well as extend applications of MRI sensors to living systems.

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Section: Cobaltmentioning

confidence: 99%

Fluorescent, MRI, and colorimetric chemical sensors for the first-row d-block metal ions

et al. 2015

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“…Pyridine-2-aldehyde-2-pyridylhydrazone (PAPH) is slowly oxidized to a fluorescent product by bromate in acidic medium. An indirect determination of cobalt based on the decrease of fluorescence produced by cobalt complexation of PAPH as revealed by a decrease in the rate of oxidation has been developed by Garcia Sanchez et al (159). Detailed information on acidity effects and two procedures, one based on the method of tangents and the other on the length of induction period for the ligand oxidation, is presented.…”

Section: Kinetic Methods Based On Uncatalyzed Reactionsmentioning

confidence: 99%

Kinetic determinations and some kinetic aspects of analytical chemistry

Mottola¹,

Mark²

1984

Anal. Chem.

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received his B.A. degree from the University of Virginia In 1956 and his Ph.D. degree from Duke University in 1960. He was a postdoctoral research associate at the University of North Carolina (with C. N. Rellley) from 1960 to 1962 and at the California Institute of Technology (with F. C. Anson) from 1962 to 1963. He was a member of the staff of the Department of Chemistry at the University of Michigan from 1963 to 1970, Visiting Professor ol Chemistry at the Unlversite Libre de Bruxelles. 1970, and Joined the staff at the University of Cincinnati in 1970. He was the Department Head from 1976 to 1981. Hfe research Interests are In electrochemistry, surface chemistry, kinetic methods of analysis, environmental analytical problems, and instrumentation. In addition to research papers, he is the coauthor of the books "Kinetics in Analytical Chemistry", "Activated Carbon: Surface Chemistry and Adsorption from Solution", and "Simplified Circuit Analysis; Digital-Analog Logic". He Is also a coeditor of the monograph series "Computers In Chemistry and Instrumentation" and "Water Quality Handbook" and has been a member of the Editorial Board of Analytical Chemistry. Analytical Letters, Chemical Instrumentation, and Talanta.

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“…Fluorescence methods for cobalt(ii) may be subject to paramagnetic quenching, dependent in complexes on spin-orbit coupling. Possibly as a consequence, few analytical methods for cobalt based on fluorescence have been reported 31,32 and most of these have involved extraction, 33,34 or have been quenching, 35 catalytic 36 or kinetic 37 methods. Some nitrogen-containing heterocyclic azo compounds are selective and sensitive reagents for the spectrophotometric 38240 and fluorimetric 41243 determination of some transition metal ions.…”

mentioning

confidence: 99%

The synthesis and applications of a new chromogenic and fluorescence reagent for cobalt(II)

Jewsbury¹,

Zuotao²

1998

Analyst

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Coupled redox and complex formation processes as a kinetic fluorimetric method for the determination of cobalt

Cited by 7 publications

References 4 publications

Fluorescent, MRI, and colorimetric chemical sensors for the first-row d-block metal ions

Fluorescent, MRI, and colorimetric chemical sensors for the first-row d-block metal ions

Kinetic determinations and some kinetic aspects of analytical chemistry

The synthesis and applications of a new chromogenic and fluorescence reagent for cobalt(II)

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