Photo-generated hydroxyl radicals contribute to the formation of halogen radicals leading to ozone depletion on and within polar stratospheric clouds surface

OH + HCl Reaction on the Surface of Ice: An Ab Initio Molecular Dynamics Study

“…A large number of water molecules exist in the form of the ice in the upper tropospheric region . It is known that the ice surface plays a key role in deciding the fate of many important atmospheric reactions. − The ice particles can affect the atmospheric chemistry in two ways: first, by promoting the heterogeneous chemistry of gas species adsorbed on its surface and, second, by acting as a sink for these gas species. , For example, it was found that the ice present in the Antarctic stratosphere plays a dominant role in the formation of ozone hole in the Antarctic region, as the ice particle adsorbed the halogenated species (ClONO 2 , HOCl, and HCl) and converted them into a more reactive species through heterogeneous reaction. , There are few studies which show that in the Antarctic region OH can be present in trace amounts . The source of OH can be the photolysis of HOCl and the HNO 3 molecule present in the polar stratospheric clouds. , The title reaction, which is the main source of Cl in the tropospheric region, can also occur in the Antarctic region with one difference.…”

“…42,43 There are few studies which show that in the Antarctic region OH can be present in trace amounts. 44 The source of OH can be the photolysis of HOCl and the HNO 3 molecule present in the polar stratospheric clouds. 42,43 The title reaction, which is the main source of Cl in the tropospheric region, can also occur in the Antarctic region with one difference.…”

Natural dihydroisobenzofuran derivatives as a template for promising radical scavengers: theoretical insights into structure–activity relationships, thermochemistry and kinetics

“…Several factors contribute to development of oxidative stress, including high-fat and high-sugar diet, drug abuse, lifestyle (especially smoking and alcohol consumption), and environmental factors such as exposure to pesticides, pollution and radiation. Although the latter are not directly bounded, they mutually influence on each other, and for example, • OH, NO • and • Cl sourcing majorly from wastes participate in ozone depletion chain reactions, increasing the amount of UV radiation that reaches Earth [7]; exposure to it is observed in a greater number of integumentary neoplasms incidences and unpleasant ecosystem changes [8].…”