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Phys Chem Chem Phys

Title:		Efficient scavenging of Criegee intermediates on water by surface-active cis-pinonic acid
Author(s):		Enami S; Colussi AJ;
Address:		"National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan. enami.shinichi@nies.go.jp"
Journal Title:		Phys Chem Chem Phys
Year:		2017
Volume:		19
Issue:		26
Page Number:		17044 - 17051
DOI:		10.1039/c7cp03869k
ISSN/ISBN:		1463-9084 (Electronic) 1463-9076 (Linking)
Abstract:		"cis-Pinonic acid (CPA), the main product of the atmospheric oxidation of biogenic alpha-pinene emissions and a major component of secondary organic aerosol (SOA), is a potentially key species en route to extremely low volatility compounds. Here, we report that CPA is an exceptionally efficient scavenger of Criegee intermediates (CIs) on aqueous surfaces. Against expectations, millimolar CPA (a surface-active C(10) keto-carboxylic acid possessing a rigid skeleton) is able to compete with 23 M bulk water for the CIs produced in the ozonolysis of sesquiterpene solutes by O(3)(g) on the surface of a water:acetonitrile solvent. The significance of this finding is that CPA reactions with sesquiterpene CIs on the surface of aqueous organic aerosols would directly generate C(25) species. The finding that competitive reactions at the air-liquid interface depend on interfacial rather than bulk reactant concentrations should be incorporated in current chemical models dealing with SOA formation, growth and aging"
Keywords:
Notes:		"PubMed-not-MEDLINEEnami, Shinichi Colussi, A J eng England 2017/06/24 Phys Chem Chem Phys. 2017 Jul 5; 19(26):17044-17051. doi: 10.1039/c7cp03869k"