%0 Journal Article %1 Nash:2003p415 %A Nash, K %A Sayer, R %A Couling, S %A Fletcher, J %A Henderson, A %A Vickerman, J %A Horn, Andrew B %D 2003 %J Physical Chemistry Chemical Physics %K imported %N 22 %P 5101--5107 %T The role of surface molecular hydrates in the heterogeneous interaction of NH3 with sulfuric acid monohydrate %U http://links.isiglobalnet2.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=mekentosj&SrcApp=Papers&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000186257700016 %V 5 %X The interaction of gaseous NH3 with thin films of sulfuric acid monohydrate (SAM, H3O+ HSO4-) in the 200-230 K range has been monitored by infrared spectroscopy and secondary ion mass spectrometry. The reaction occurs with the formation of the characteristic IR spectral features of the NH4+ and "salt" bisulfate ions, whilst loss of H3O+ and an additional surface species is observed. The evolution of the spectral features with time suggest that two processes are occurring at the uppermost surface layers, with a rapid initial reaction which saturates as the amount of available reactants on the surface is reduced and a slower continuous process which depends upon the transport of new reactants to and the removal of reaction products away from the surface. By comparison with the IR spectra of a variety of sulfuric acid hydrates, a surface reaction scheme is proposed and the implications of these observations for the reaction of condensed acids (sulfate aerosol) with bases in the atmosphere is discussed. %Z Article 737XM English Times Cited:1 Cited References Count:29

@article{Nash:2003p415, abstract = {The interaction of gaseous NH3 with thin films of sulfuric acid monohydrate (SAM, H3O+ HSO4-) in the 200-230 K range has been monitored by infrared spectroscopy and secondary ion mass spectrometry. The reaction occurs with the formation of the characteristic IR spectral features of the NH4+ and "salt" bisulfate ions, whilst loss of H3O+ and an additional surface species is observed. The evolution of the spectral features with time suggest that two processes are occurring at the uppermost surface layers, with a rapid initial reaction which saturates as the amount of available reactants on the surface is reduced and a slower continuous process which depends upon the transport of new reactants to and the removal of reaction products away from the surface. By comparison with the IR spectra of a variety of sulfuric acid hydrates, a surface reaction scheme is proposed and the implications of these observations for the reaction of condensed acids (sulfate aerosol) with bases in the atmosphere is discussed.}, added-at = {2010-06-22T19:38:37.000+0200}, affiliation = {Horn, AB Univ Manchester, Dept Chem, Oxford Rd, Manchester M13 9PL, Lancs, England Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England UMIST, Dept Chem, Manchester M60 1QD, Lancs, England}, annote = {Article 737XM English Times Cited:1 Cited References Count:29}, author = {Nash, K and Sayer, R and Couling, S and Fletcher, J and Henderson, A and Vickerman, J and Horn, Andrew B}, biburl = {https://www.bibsonomy.org/bibtex/25716ebbecbab000dea1323f7ccb3a71a/gsmith}, date-added = {2010-03-10 16:47:43 -0500}, date-modified = {2010-03-11 11:04:36 -0500}, interhash = {171ea94e9d08b75d4bb7f85af9d91eca}, intrahash = {5716ebbecbab000dea1323f7ccb3a71a}, journal = {Physical Chemistry Chemical Physics}, keywords = {imported}, label = {rec-number 1023}, local-url = {file://localhost/Users/geoffreysmith/Documents/Papers/Physical%20Chemistry%20Chemical%20Physics/2003/Physical%20Chemistry%20Chemical%20Physics,%205,%205101-5107%202003.pdf}, number = 22, pages = {5101--5107}, pmid = {000186257700016}, rating = {0}, timestamp = {2010-06-22T19:39:06.000+0200}, title = {The role of surface molecular hydrates in the heterogeneous interaction of NH3 with sulfuric acid monohydrate}, uri = {papers://E88B624E-D406-46FF-9D95-BB9C1AAE3FDC/Paper/p415}, url = {http://links.isiglobalnet2.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=mekentosj&SrcApp=Papers&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000186257700016}, volume = 5, year = 2003 }