UV photodissociation spectroscopy of oxidized undecylenic acid films

The Journal of Physical Chemistry. a
Anthony L GomezSergey A Nizkorodov

Abstract

Oxidation of thin multilayered films of undecylenic (10-undecenoic) acid by gaseous ozone was investigated using a combination of spectroscopic and mass spectrometric techniques. The UV absorption spectrum of the oxidized undecylenic acid film is significantly red-shifted compared to that of the initial film. Photolysis of the oxidized film in the tropospheric actinic region (lambda > 295 nm) readily produces formaldehyde and formic acid as gas-phase products. Photodissociation action spectra of the oxidized film suggest that organic peroxides are responsible for the observed photochemical activity. The presence of peroxides is confirmed by mass-spectrometric analysis of the oxidized sample and an iodometric test. Significant polymerization resulting from secondary reactions of Criegee radicals during ozonolysis of the film is observed. The data strongly imply the importance of photochemistry in aging of atmospheric organic aerosol particles.

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Citations

Oct 23, 2015·Environmental Science & Technology·David R FoosheePierre F Baldi
Jun 10, 2017·The Journal of Physical Chemistry. a·Kurtis T Malecha, Sergey A Nizkorodov
Dec 3, 2009·Physical Chemistry Chemical Physics : PCCP·Martin D KingArwel V Hughes
Aug 4, 2009·ChemSusChem·Marijke Van der Steen, Christian V Stevens
May 27, 2010·Physical Chemistry Chemical Physics : PCCP·Sopheak NetHenri Wortham
Jan 10, 2008·Physical Chemistry Chemical Physics : PCCP·Federico KaragulianBarbara J Finlayson-Pitts
Jan 22, 2008·The Journal of Physical Chemistry. a·Adla JammoulBarbara D'Anna
Feb 22, 2007·The Journal of Physical Chemistry. a·Maggie L WalserSergey A Nizkorodov
Aug 15, 2008·The Journal of Physical Chemistry. a·Stephen A MangSergey A Nizkorodov
Mar 17, 2015·Chemical Reviews·Christian GeorgeSergey A Nizkorodov

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