Insight into the degradation of a manganese(III)-citrate complex in aqueous solutions
-
Adrian Topolski
Abstract
Kinetics of the electron transfer process between citrates and manganese(III) ions has been studied in acidic aqueous solutions. Acidification of the reaction mixture increased the reaction rate. The reaction is dependent on pH because there are two main protolytic forms of the Mn(III)-citrate complex in the studied pH range (4.5–6.5). Reduction potentials of Mn(III)/Mn(II) system in acidic and basic solutions as well as protolytic equilibria play a crucial role in understanding the pH profile of the studied system. The rate constants for Mn(III)citH and Mn(III)citH2+ species degradation processes are presented (citH3− and citH22− are trivalent and divalent anions of citric acid, citH4, respectively). Protolytic constant (expressed as pK′a) for Mn(III)citH protonation is estimated and discussed.
[1] Berg, J. M., Tymoczko, J. L., & Stryer, L. (2002). Biochemistry (5th ed.). New York, NY, USA: W. H. Freeman. Suche in Google Scholar
[2] Crossgrove, J. S., Allen, D. D., Bukaveckas, B. L., Rhineheimer, S. S., & Yokel, R. A. (2003). Manganese distribution across the blood-brain barrier. I. Evidence for carrier-mediated influx of manganese citrate as well as manganese and manganese transferrin. NeuroToxicology, 24, 3–13. DOI: 10.1016/S0161-813X(02)00089-X. http://dx.doi.org/10.1016/S0161-813X(02)00089-X10.1016/S0161-813X(02)00089-XSuche in Google Scholar
[3] Harrar, J. E., & Rigdon, L. P. (1969). Controlled-potential coulometry and voltammetry of manganese in pyrophosphate medium. Analytical Chemistry, 41, 758–765. DOI: 10.1021/ac60275a018. http://dx.doi.org/10.1021/ac60275a01810.1021/ac60275a018Suche in Google Scholar
[4] Klewicki, J. K., & Morgan, J. J. (1998). Kinetic behavior of Mn(III) complexes of pyrophosphate, EDTA, and citrate. Environmental Science & Technology, 32, 2916–2922. DOI: 10.1021/es980308e. http://dx.doi.org/10.1021/es980308e10.1021/es980308eSuche in Google Scholar
[5] Miessler, G. L., & Tarr, D. A. (2004). Inorganic chemistry (3rd ed.). Engelwood Clifs, NJ, USA: Prentice Hall. Suche in Google Scholar
[6] Pierre, J. L., & Gautier-Luneau, I. (2000). Iron and citric acid: A fuzzy chemistry of ubiquitous biological relevance. BioMetals, 13, 91–96. DOI: 10.1023/A:1009225701332. http://dx.doi.org/10.1023/A:100922570133210.1023/A:1009225701332Suche in Google Scholar
[7] Topolski, A., Wiśniewska, J., Impert, O., & Kita, P. (2009). Kinetics of promazine and methylene blue oxidation by manganese(III) diphosphate complex. Polish Journal of Chemistry, 83, 697–702. Suche in Google Scholar
[8] Trouwborst, R. E., Clement, B. G., Tebo, B. M., Glazer, B. T., & Luther, III, G. W. (2006). Soluble Mn(III) in suboxic zones. Science, 313, 1955–1957. DOI: 10.1126/science.1132876. http://dx.doi.org/10.1126/science.113287610.1126/science.1132876Suche in Google Scholar PubMed
© 2010 Institute of Chemistry, Slovak Academy of Sciences
Artikel in diesem Heft
- Steam-reforming of ethanol for hydrogen production
- Polymeric ionic liquid as a background electrolyte modifier enhancing the separation of inorganic anions by capillary electrophoresis
- Enantioselective extraction of terbutaline enantiomers with β-cyclodextrin derivatives as hydrophilic selectors
- Effective photocatalytic degradation of an azo dye over nanosized Ag/AgBr-modified TiO2 loaded on zeolite
- Photocatalytically-assisted electrochemical degradation of p-aminophenol in aqueous solutions using zeolite-supported TiO2 catalyst
- Spectroscopic investigations and physico-chemical characterization of newly synthesized mixed-ligand complexes of 2-methylbenzimidazole with metal ions
- Synthesis, molecular characterisation, and in vivo study of platinum(IV) coordination compounds against B16 mouse melanoma tumours
- Swelling properties of particles in amphoteric polyacrylamide dispersion
- Electronic structures and spectroscopic regularities of phenylene-modified SWCNTs
- An expeditious, environment-friendly, and microwave-assisted synthesis of 5-isatinylidenerhodanine derivatives
- Pd-catalysed conjugate addition of arylboronic acids to α,β-unsaturated ketones under microwave irradiation
- Regioselective N-alkylation of (2-chloroquinolin-3-yl) methanol with N-heterocyclic compounds using the Mitsunobu reagent
- Antimycobacterial 3-phenyl-4-thioxo-2H-1,3-benzoxazine-2(3H)-ones and 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-dithiones substituted on phenyl and benzoxazine moiety in position 6
- Polar constituents of Ligustrum vulgare L. and their effect on lipoxygenase activity
- Solubility of methane in pure non-ionic surfactants and pure and mixtures of linear alcohols at 298 K and 101.3 kPa
- Theoretical studies on polynitrobicyclo[1.1.1]pentanes in search of novel high energy density materials
- Insight into the degradation of a manganese(III)-citrate complex in aqueous solutions
Artikel in diesem Heft
- Steam-reforming of ethanol for hydrogen production
- Polymeric ionic liquid as a background electrolyte modifier enhancing the separation of inorganic anions by capillary electrophoresis
- Enantioselective extraction of terbutaline enantiomers with β-cyclodextrin derivatives as hydrophilic selectors
- Effective photocatalytic degradation of an azo dye over nanosized Ag/AgBr-modified TiO2 loaded on zeolite
- Photocatalytically-assisted electrochemical degradation of p-aminophenol in aqueous solutions using zeolite-supported TiO2 catalyst
- Spectroscopic investigations and physico-chemical characterization of newly synthesized mixed-ligand complexes of 2-methylbenzimidazole with metal ions
- Synthesis, molecular characterisation, and in vivo study of platinum(IV) coordination compounds against B16 mouse melanoma tumours
- Swelling properties of particles in amphoteric polyacrylamide dispersion
- Electronic structures and spectroscopic regularities of phenylene-modified SWCNTs
- An expeditious, environment-friendly, and microwave-assisted synthesis of 5-isatinylidenerhodanine derivatives
- Pd-catalysed conjugate addition of arylboronic acids to α,β-unsaturated ketones under microwave irradiation
- Regioselective N-alkylation of (2-chloroquinolin-3-yl) methanol with N-heterocyclic compounds using the Mitsunobu reagent
- Antimycobacterial 3-phenyl-4-thioxo-2H-1,3-benzoxazine-2(3H)-ones and 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-dithiones substituted on phenyl and benzoxazine moiety in position 6
- Polar constituents of Ligustrum vulgare L. and their effect on lipoxygenase activity
- Solubility of methane in pure non-ionic surfactants and pure and mixtures of linear alcohols at 298 K and 101.3 kPa
- Theoretical studies on polynitrobicyclo[1.1.1]pentanes in search of novel high energy density materials
- Insight into the degradation of a manganese(III)-citrate complex in aqueous solutions
