Influence of sodium dodecyl sulfate on the kinetics of complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione
Апстракт
The effect of sodium dodecyl sulfate (SDS) micelles on the kinetics of the complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione (GSH) was investigated by using the stopped-flow technique under pseudo-first order conditions (ligand in excess) in the acidity range from pH 1 to 6. The presence of anionic micelles induced the acceleration of the complex formation in the entire acidity range with the maxima corresponding to the first protolytic constant of the ligands. This effect was interpreted in terms of the attractive electrostatic interaction between reacting species and the micellar surface and their effective concentration in the vicinity of micelles. An increase of the ionic strength leads to a decrease of the rate of complex formation in the presence of anionic micelles due to competition of reactive species with cations originating from inert salt for the micellar surface. The calculation of activation parameters revealed that the ent...ropy of activation is strongly negative in the presence and in the absence of micelles, which is compatible with an associative reaction mechanism. (C) 2002 Elsevier Science Ltd. All rights reserved.
Кључне речи:
palladium(II) / glutathione / L-cysteine / sodium dodecyl sulfate / complex formation / micellar catalysisИзвор:
Polyhedron, 2003, 22, 2, 279-285
DOI: 10.1016/S0277-5387(02)01307-4
ISSN: 0277-5387
WoS: 000180473500008
Scopus: 2-s2.0-0037439042
Колекције
Институција/група
VinčaTY - JOUR AU - Vasić, Vesna M. AU - Čakar, Mira M. AU - Savić, Jasmina AU - Petrović, B AU - Nedeljković, Jovan AU - Bugarcic, I PY - 2003 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2601 AB - The effect of sodium dodecyl sulfate (SDS) micelles on the kinetics of the complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione (GSH) was investigated by using the stopped-flow technique under pseudo-first order conditions (ligand in excess) in the acidity range from pH 1 to 6. The presence of anionic micelles induced the acceleration of the complex formation in the entire acidity range with the maxima corresponding to the first protolytic constant of the ligands. This effect was interpreted in terms of the attractive electrostatic interaction between reacting species and the micellar surface and their effective concentration in the vicinity of micelles. An increase of the ionic strength leads to a decrease of the rate of complex formation in the presence of anionic micelles due to competition of reactive species with cations originating from inert salt for the micellar surface. The calculation of activation parameters revealed that the entropy of activation is strongly negative in the presence and in the absence of micelles, which is compatible with an associative reaction mechanism. (C) 2002 Elsevier Science Ltd. All rights reserved. T2 - Polyhedron T1 - Influence of sodium dodecyl sulfate on the kinetics of complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione VL - 22 IS - 2 SP - 279 EP - 285 DO - 10.1016/S0277-5387(02)01307-4 ER -
@article{ author = "Vasić, Vesna M. and Čakar, Mira M. and Savić, Jasmina and Petrović, B and Nedeljković, Jovan and Bugarcic, I", year = "2003", abstract = "The effect of sodium dodecyl sulfate (SDS) micelles on the kinetics of the complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione (GSH) was investigated by using the stopped-flow technique under pseudo-first order conditions (ligand in excess) in the acidity range from pH 1 to 6. The presence of anionic micelles induced the acceleration of the complex formation in the entire acidity range with the maxima corresponding to the first protolytic constant of the ligands. This effect was interpreted in terms of the attractive electrostatic interaction between reacting species and the micellar surface and their effective concentration in the vicinity of micelles. An increase of the ionic strength leads to a decrease of the rate of complex formation in the presence of anionic micelles due to competition of reactive species with cations originating from inert salt for the micellar surface. The calculation of activation parameters revealed that the entropy of activation is strongly negative in the presence and in the absence of micelles, which is compatible with an associative reaction mechanism. (C) 2002 Elsevier Science Ltd. All rights reserved.", journal = "Polyhedron", title = "Influence of sodium dodecyl sulfate on the kinetics of complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione", volume = "22", number = "2", pages = "279-285", doi = "10.1016/S0277-5387(02)01307-4" }
Vasić, V. M., Čakar, M. M., Savić, J., Petrović, B., Nedeljković, J.,& Bugarcic, I.. (2003). Influence of sodium dodecyl sulfate on the kinetics of complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione. in Polyhedron, 22(2), 279-285. https://doi.org/10.1016/S0277-5387(02)01307-4
Vasić VM, Čakar MM, Savić J, Petrović B, Nedeljković J, Bugarcic I. Influence of sodium dodecyl sulfate on the kinetics of complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione. in Polyhedron. 2003;22(2):279-285. doi:10.1016/S0277-5387(02)01307-4 .
Vasić, Vesna M., Čakar, Mira M., Savić, Jasmina, Petrović, B, Nedeljković, Jovan, Bugarcic, I, "Influence of sodium dodecyl sulfate on the kinetics of complex formation between [PdCl(dien)](+) and sulfur containing ligands L-cysteine and glutathione" in Polyhedron, 22, no. 2 (2003):279-285, https://doi.org/10.1016/S0277-5387(02)01307-4 . .