In solution stability of organic peroxides

Abstract

<p>Organic peroxides are compounds possessing one or more oxygen&#8211;oxygen bonds. They are derivatives of hydrogen peroxide (H₂O₂), in which one or both hydrogens are replaced by a group containing carbon. This kind of compounds are ubiquitous in the environment being detected in Secondary Organic Aerosols (SOA)^1,2, rainwater, and cloud water^3,4. The role of peroxides is very important from health and climate perspectives⁵, and to understand the mechanism of SOA formation⁶. It is known that they can easily decompose to form H₂O₂ and other products⁷. However, the decomposition processes for organic peroxides have not been studied in a systematic way that allow to stablish improved strategies for sampling and storage of the samples. Moreover, these processes would happen in the atmosphere and need to be included in atmospheric models.</p><p>The aim of this work is to study the decomposition rate at different temperatures of hydroperoxides formed in the aqueous solution of some atmospherically relevant organic compounds with ozone. Iodometric method is used to monitor the total peroxides concentration. The implications related to sampling and storage for atmospheric samples containing organic peroxides are discussed together with the atmospheric impact of the studied processes.&#160;<strong>&#160;&#160;&#160;&#160;&#160;</strong></p><p><strong>REFERENCES:&#160; &#160; 1. </strong>Mutzel, A., L. Poulain, T. Berndt, Y. Iinuma, M. Rodigast, O. B&#246;ge, S. Richters, G. Spindler, M. Sipila, T. Jokinen, et al. 2015. Environ. Sci. Technol. <strong>2015</strong>, 49 (13):7754&#8211;61. ; 2. Kristensen, K., &#197;. K. Watne, J. Hammes, A. Lutz, T. Pet&#228;j&#228;, M. Hallquist, M. Bilde, and M. Glasius. Environ. Sci. Technol. Lett. <strong>2016</strong>, 3 (8):280&#8211;5; 3. Kelly, T.J., Daum, P.H. and S.E. Schwartz. J. Geophysical Research. <strong>1985</strong>, 90(D5), 7861-7871; 4. Huang, S., Fuse, Y., Yamda, E. and Kagaku, B. Bunseki Kagaku. <strong>2004,</strong> 53(9), 875-881; 5. Tao, F.; Gonzalez-Flecha, B.; Kobzik, L. Free Radical Biol. Med. <strong>2003</strong>, 35, 327&#8722;340; 6.Seinfeld, J. H.; Pandis, S. N. Atmospheric Chemistry and Physics: From Air Pollution to Climate Change, 3rd ed.; John Wiley & Sons: Hoboken, NJ, 2016; 7. Badali, K.M., Zhou, S., Aljawhary, D., Anti&#241;olo, M., Chen, W.J., Lok, A., Mungall, Wong, E., J. P. S., Zhao, R. and Abbatt, J.P.D. Atmos. Chem. Phys., <strong>2015,</strong> 15, 7831&#8211;7840.</p>