Browsing by Author "Cecoi, Natalia"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Adsorption wave of vanadium complex with 2,3–dihydroxybenzaldehyde [Articol]
    (Institute of Chemistry of ASM, 2009) Kiriyak, Ludmila; Cecoi, Natalia; Cazac, Tatiana; Revenco, Mihail
    The polarographic behavior of the complex formed by V(V) and 2,3–dihydroxybenzaldehyde (2,3–DHBA) in the solution containing acetate buffer (pH 5,2) has been investigated. By means of a.c. polarography, chronovoltammetry and other techniques, it has been shown that the electrode process is complicated by the adsorption of 2,3-DHBA and its vanadium complex. The kinetic and adsorption parameters of the electrode process have been determined: adsorption equilibrium constant B= 1,32⋅105 mol-1⋅dm3, the attraction constant γ = 1,2, the maximum surface concentration Гmax = 9,10⋅10-11 mol⋅ cm-2; the share of the electrode surface occupied by one particle of the adsorbed complex S = 1,81 nm2 and the free adsorption energy ∆G = - 39,1 kJ· mol-1.
  • Thumbnail Image
    Item
    Adsorption wave of vanadium complex with 2,3–dihydroxybenzaldehyde [Articol]
    (Academia de Știinițe a Moldovei, 2009) Kiriyak, Ludmila; Cecoi, Natalia; Cazac, Tatiana; Revenco, Mihail
    The polarographic behavior of the complex formed by V(V) and 2,3–ihydroxybenzaldehyde (2,3–DHBA) in the solution containing acetate buffer (pH 5,2) has been investigated. By means of a.c. polaro-graphy, chronovoltammetry and other techniques, it has been shown that the electrode process is complicated by the adsorption of 2,3-DHBA and its vanadium complex. The kinetic and adsorption parameters of the electrode process have been determined: adsorption equilibrium constant B= 1,32⋅105 mol-1⋅dm3, the attraction constant γ = 1,2, the maximum surface concentration Гmax = 9,10⋅10-11 mol⋅ cm-2; the share of the electrode surface occupied by one particle of the adsorbed complex S = 1,81 nm2 and the free adsorption energy ∆G = - 39,1 kJ· mol-1.