Last Deborah J, Nájera Juan J, Wamsley Ruth, Hilton Gareth, McGillen Max, Percival Carl J, Horn Andrew B
School of Chemistry, University of Manchester, Oxford Rd, Manchester, UKM13 9PL.
Phys Chem Chem Phys. 2009 Mar 7;11(9):1427-40. doi: 10.1039/b815425b. Epub 2009 Jan 27.
In this paper, infrared spectroscopic and mass spectrometric studies of the ozonolysis of some simple proxies of precursors to organic materials found in atmospheric aerosols is reported. Oleic and maleic acids are used as proxies of reactive material, containing unsaturation which is amenable to ozonolysis. Nonanoic acid and benzoic acid are utilised as co-reactants which, although not likely to undergo direct ozonolysis themselves, are potential reaction partners to the Criegee radical intermediates formed from oleic and maleic acid ozonolysis. The precursor species are studied as single components in solution, followed by co-reaction studies. The products of the ozonolysis are followed by mass spectrometry and infrared spectroscopy. The product distributions from oleic and maleic acid are broadly in agreement with those observed in other studies. In the co-reaction studies, new evidence for cross-reaction products is obtained. Furthermore, the nature of some of the products does not fully comply with the widely accepted Ziemann scheme.
本文报道了对大气气溶胶中发现的有机材料前体的一些简单替代物进行臭氧分解的红外光谱和质谱研究。油酸和顺丁烯二酸被用作反应性物质的替代物，它们含有易于臭氧分解的不饱和键。壬酸和苯甲酸用作共反应物，尽管它们本身不太可能直接发生臭氧分解，但它们是油酸和顺丁烯二酸臭氧分解形成的克里格自由基中间体的潜在反应伙伴。前体物质作为溶液中的单一成分进行研究，随后进行共反应研究。臭氧分解的产物通过质谱和红外光谱进行跟踪。油酸和顺丁烯二酸的产物分布与其他研究中观察到的大致一致。在共反应研究中，获得了交叉反应产物的新证据。此外，一些产物的性质并不完全符合广泛接受的齐曼方案。
