Vibrational exciton coupling in pure and composite sulfur dioxide aerosols

Faraday Discussions
R Signorell, Martin Jetzki

Abstract

Icy aerosol particles determine weather processes in planetary atmospheres and are discussed as sites of chemical reactions in interstellar dust. One of the interesting ice systems in this context are pure and composite SO2 particles. Vibrational exciton coupling is exploited in the present study to understand the properties of SO2 aerosol particles from their infrared spectroscopic signatures. The condensation to pure SO2 ice particles leads to a partially amorphous structure of the particles, whose infrared spectra do not show pronounced shape effects. The simultaneous condensation of SO2 and CO2 gas results in aerosol particles with a core-shell structure. Icy SO2 forms the core, whereas CO2 remains in the shell. This structure is mainly determined by the different thermodynamic properties of the two substances and the less favorable intermolecular interactions between SO2 and CO2 compared with the pure substances. The example of mixed sulfur dioxide/ammonia particles demonstrates that nanosized aerosol particles are ideal nanoreactors. They facilitate an easy homogeneous mixture of the reactants providing an interface-free reaction environment.

References

Jul 23, 2004·The Journal of Chemical Physics·Martin JetzkiRuth Signorell
May 25, 2005·The Journal of Chemical Physics·Yang SongDudley R Herschbach
Mar 3, 2006·The Journal of Physical Chemistry. a·Ruth SignorellRoman Ueberschaer
Sep 15, 2006·Physical Chemistry Chemical Physics : PCCP·George FiranescuRuth Signorell

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Citations

Jun 29, 2012·Accounts of Chemical Research·Thomas C Preston, Ruth Signorell
Oct 22, 2008·Annual Review of Physical Chemistry·Omar F SigurbjörnssonRuth Signorell
Dec 13, 2012·The Journal of Chemical Physics·Masanari NagasakaNobuhiro Kosugi
Sep 23, 2011·The Journal of Physical Chemistry. a·M WinklerK J Børve
May 15, 2013·The Journal of Physical Chemistry. a·E Kathrin LangRuth Signorell
Sep 4, 2009·Physical Chemistry Chemical Physics : PCCP·Chris MedcraftDon McNaughton
Sep 4, 2009·Physical Chemistry Chemical Physics : PCCP·Evan G RobertsonDon McNaughton
Jun 4, 2010·Physical Chemistry Chemical Physics : PCCP·Thomas C PrestonRuth Signorell
Feb 7, 2013·Physical Chemistry Chemical Physics : PCCP·Chris MedcraftEvan G Robertson
Nov 20, 2013·The Journal of Physical Chemistry. a·M WinklerK J Børve
Jul 23, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Omar F Sigurbjörnsson, Ruth Signorell
Dec 17, 2017·The Journal of Chemical Physics·Bryan R Bzdek, Jonathan P Reid
Jul 3, 2009·The Journal of Physical Chemistry. a·Chia C WangRuth Signorell
Apr 11, 2009·The Journal of Physical Chemistry. B·George Firanescu, Ruth Signorell

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