Question

Antioxidants physical quenching and chemical quenching differnce

Answer 1

Free radical is defined by the occurrence of an unpaired electron in an organic molecule or metal. This potentially unstable electronic configuration can react either to acquire or to lose an electron and form a more stable product. Free radicals have the potential to serve as either effective oxidants or reductants while Free radical quenching can be defined as any reaction in which the free radical forms products that are not free radicals.

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Answer 2

The efficiency of the physical quenching is mainly controlled by the presence of a catechol moiety on ring B, whereas the structure of ring C (particularly the presence of a hydroxyl group activating the double bond) is the main factor determining the efficiency of the chemical reactivity of these compounds with 1O2.

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