UTICAJ pH VREDNOSTI NA ANTIRADIKALSKI KAPACITET 4,7- DIHIDROKSIKUMARINA | Zendy

Žiko Milanović | Zendy; Ana Kesić | Zendy; Edina H. Avdović | Zendy; Jelena Đorovic Jovanovic | Zendy; Dejan Milenković | Zendy

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UTICAJ pH VREDNOSTI NA ANTIRADIKALSKI KAPACITET 4,7- DIHIDROKSIKUMARINA

Author(s) -

Žiko Milanović,

Ana Kesić,

Edina H. Avdović,

Jelena Đorovic Jovanovic,

Dejan Milenković

Publication year - 2021

Publication title -

zbornik radova - geografski fakultet univerziteta u beogradu

Language(s) - English

Resource type - Conference proceedings

eISSN - 2334-9441

pISSN - 1450-7552

DOI - 10.46793/sbt26.481m

Subject(s) - radical , chemistry , base (topology) , molar ratio , nuclear chemistry , inorganic chemistry , catalysis , organic chemistry , mathematics , mathematical analysis

The mechanisms of antiradical activity of 4,7-dihydroxycoumarin against peroxy (HOO•) radical were investigated. For this purpose were used sophisticated computational methods. Investigation was performed in the water, at different pH values (0-14). Acid-base species, which are represented in diverse molar fraction (f) at different pH values, contribute to a comprehensive examination of antiradical capacity. An overall rate constant (koverall) of the favorable reaction pathways (HAT and RAF) of 2.07×102 M-1s-1 at physiological pH indicates a moderate ability to neutralization HOO• radicals. A value of 1.05×103 M-1 s-1 occurring at pH > 10 indicates a maximum antiradical capacity of 4,7-dihydroxymumarin against the HOO• radical.

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