New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols
Само за регистроване кориснике
2015
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The KSCN-H2O2-NaOH-Cu(II)-catalyzed system is one of the few reactions in which chemical oscillations can be observed in batch conditions. In the present paper, this oscillating reaction was revisited in a wide range of initial concentrations of all components in batch. A mixture with a long lasting oscillation time (1 h 34 min) and a great number of oscillations (24) was found and used to investigate the effect of temperature. An Arrhenius-type temperature dependence was observed from which an apparent average activation energy E-av = 76 +/- 5 kJ for the overall oscillatory reaction was observed. A mechanistic study based on a modified model analyzed by the stoichiometric network analysis approach gave a satisfactory agreement between calculated and experimental oscillating behaviors and temperature dependence. The addition of the three diphenols (catechol, resorcinol, and hydroquinone) causes perturbations similar to those observed in the Briggs-Rauscher oscillating system, i.e., an ...inhibition of the oscillatory regime. These inhibitory effects were described in detail, and a reasonable qualitative interpretation is given.
Извор:
International Journal of Chemical Kinetics, 2015, 47, 2, 82-92Издавач:
- Wiley-Blackwell, Hoboken
Финансирање / пројекти:
- Динамика нелинеарних физичкохемијских и биохемијских система са моделирањем и предвиђањем њихових понашања под неравнотежним условима (RS-MESTD-Basic Research (BR or ON)-172015)
- Наноструктурни функционални и композитни материјали у каталитичким и сорпционим процесима (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45001)
DOI: 10.1002/kin.20894
ISSN: 0538-8066
WoS: 000346828400002
Scopus: 2-s2.0-84919617080
Институција/група
IHTMTY - JOUR AU - Čupić, Željko AU - Greco, Emanuela AU - Cervellati, Rinaldo PY - 2015 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1781 AB - The KSCN-H2O2-NaOH-Cu(II)-catalyzed system is one of the few reactions in which chemical oscillations can be observed in batch conditions. In the present paper, this oscillating reaction was revisited in a wide range of initial concentrations of all components in batch. A mixture with a long lasting oscillation time (1 h 34 min) and a great number of oscillations (24) was found and used to investigate the effect of temperature. An Arrhenius-type temperature dependence was observed from which an apparent average activation energy E-av = 76 +/- 5 kJ for the overall oscillatory reaction was observed. A mechanistic study based on a modified model analyzed by the stoichiometric network analysis approach gave a satisfactory agreement between calculated and experimental oscillating behaviors and temperature dependence. The addition of the three diphenols (catechol, resorcinol, and hydroquinone) causes perturbations similar to those observed in the Briggs-Rauscher oscillating system, i.e., an inhibition of the oscillatory regime. These inhibitory effects were described in detail, and a reasonable qualitative interpretation is given. PB - Wiley-Blackwell, Hoboken T2 - International Journal of Chemical Kinetics T1 - New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols VL - 47 IS - 2 SP - 82 EP - 92 DO - 10.1002/kin.20894 ER -
@article{ author = "Čupić, Željko and Greco, Emanuela and Cervellati, Rinaldo", year = "2015", abstract = "The KSCN-H2O2-NaOH-Cu(II)-catalyzed system is one of the few reactions in which chemical oscillations can be observed in batch conditions. In the present paper, this oscillating reaction was revisited in a wide range of initial concentrations of all components in batch. A mixture with a long lasting oscillation time (1 h 34 min) and a great number of oscillations (24) was found and used to investigate the effect of temperature. An Arrhenius-type temperature dependence was observed from which an apparent average activation energy E-av = 76 +/- 5 kJ for the overall oscillatory reaction was observed. A mechanistic study based on a modified model analyzed by the stoichiometric network analysis approach gave a satisfactory agreement between calculated and experimental oscillating behaviors and temperature dependence. The addition of the three diphenols (catechol, resorcinol, and hydroquinone) causes perturbations similar to those observed in the Briggs-Rauscher oscillating system, i.e., an inhibition of the oscillatory regime. These inhibitory effects were described in detail, and a reasonable qualitative interpretation is given.", publisher = "Wiley-Blackwell, Hoboken", journal = "International Journal of Chemical Kinetics", title = "New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols", volume = "47", number = "2", pages = "82-92", doi = "10.1002/kin.20894" }
Čupić, Ž., Greco, E.,& Cervellati, R.. (2015). New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols. in International Journal of Chemical Kinetics Wiley-Blackwell, Hoboken., 47(2), 82-92. https://doi.org/10.1002/kin.20894
Čupić Ž, Greco E, Cervellati R. New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols. in International Journal of Chemical Kinetics. 2015;47(2):82-92. doi:10.1002/kin.20894 .
Čupić, Željko, Greco, Emanuela, Cervellati, Rinaldo, "New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols" in International Journal of Chemical Kinetics, 47, no. 2 (2015):82-92, https://doi.org/10.1002/kin.20894 . .