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Pregled bibliografske jedinice broj: 703810

Speciation of biochemically important iron complexes with amino acids : L-aspartic acid and L- aspartic acid - glycine mixture


Vukosav, Petra; Mlakar, Marina
Speciation of biochemically important iron complexes with amino acids : L-aspartic acid and L- aspartic acid - glycine mixture // Electrochimica acta, 139 (2014), 29-35 doi:10.1016/j.electacta.2014.07.006 (međunarodna recenzija, članak, znanstveni)


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Naslov
Speciation of biochemically important iron complexes with amino acids : L-aspartic acid and L- aspartic acid - glycine mixture

Autori
Vukosav, Petra ; Mlakar, Marina

Izvornik
Electrochimica acta (0013-4686) 139 (2014); 29-35

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
iron ; L-aspartic acid ; iron-aspartate complex ; stability constants ; mixed ligand complexes

Sažetak
Speciation of iron(III) (cFe = (0.5 - 40)x10^-5 mol dm-3) and indirectly of iron(II), in aqueous solution of L-aspartic acid and aspartic acid - glycine mixture was investigated by square-wave voltammetry on a static mercury drop electrode. A reversible, one-electron reduction process of iron(III)- aspartate complexes with peak potential between +0.04 and -0.17 V was recorded, depending on the solution pH (4.5 – 8.6) and concentration of aspartic acid (cAsp = 0.01 - 0.4 mol dm^-3). Cumulative stability constants of iron(III)- aspartate complexes: FeAsp+ (log K = 13.16 ± 0.01), FeAspOH0 (log β = 20.76 ± 0.02), FeAsp(OH)2- (log β = 27.77 ± 0.12) and Fe(Asp)2- (log β = 17.62 ± 0.10) ; and iron(II)-aspartate complexes: FeAsp0 (log K = 4.17 ± 0.11) and Fe(Asp)22- (log β = 6.53 ± 0.11), were determined at Ic = 0.5 mol dm^-3 and 25 ± 1 °C. In the solution with mixture of amino acids, aspartic acid and glycine, a formation of mixed (Fe(III)- aspartate-glycine) complexes occurred. The reduction process was also shown to be reversible, so stability constants of mixed complexes (iron(III): FeAspGly0 (log β = 17.35 ± 0.02), FeAspGly(OH)- (log β = 23.87 ± 0.33), and iron(II): FeAspGly- (log β = 6.83 ± 0.23)) were calculated, as well.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija, Biologija



POVEZANOST RADA


Projekt / tema
098-0982934-2720 - MEĐUDJELOVANJA OBLIKA TRAGOVA METALA U VODENOM OKOLIŠU (Ivanka Pižeta, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Marina Mlakar (autor)

Avatar Url Petra Vukosav (autor)

Citiraj ovu publikaciju

Vukosav, Petra; Mlakar, Marina
Speciation of biochemically important iron complexes with amino acids : L-aspartic acid and L- aspartic acid - glycine mixture // Electrochimica acta, 139 (2014), 29-35 doi:10.1016/j.electacta.2014.07.006 (međunarodna recenzija, članak, znanstveni)
Vukosav, P. & Mlakar, M. (2014) Speciation of biochemically important iron complexes with amino acids : L-aspartic acid and L- aspartic acid - glycine mixture. Electrochimica acta, 139, 29-35 doi:10.1016/j.electacta.2014.07.006.
@article{article, year = {2014}, pages = {29-35}, DOI = {10.1016/j.electacta.2014.07.006}, keywords = {iron, L-aspartic acid, iron-aspartate complex, stability constants, mixed ligand complexes}, journal = {Electrochimica acta}, doi = {10.1016/j.electacta.2014.07.006}, volume = {139}, issn = {0013-4686}, title = {Speciation of biochemically important iron complexes with amino acids : L-aspartic acid and L- aspartic acid - glycine mixture}, keyword = {iron, L-aspartic acid, iron-aspartate complex, stability constants, mixed ligand complexes} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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