Surface chemistry of dihydromyrcenol (2,6-dimethyl-7-octen-2-ol) with ozone on silanized glass,glass, and vinyl flooring tiles |
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| Authors: | Jason E Ham J Raymond Wells |
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| Institution: | 1. Research and Development Centre, Bharathiar University, Coimbatore 641 046, India;2. Department of Chemistry, Kanchi Mamunivar Centre for Post-Graduate Studies, Puducherry 605 008, India;3. Department of Physics, Tagore Arts College, Puducherry 605 008, India;4. School of Sciences and Humanities, Vel Tech University, Avadi, Chennai 600 062, India;1. School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA;2. School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA;3. Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;1. Laboratory of Nanotechnology and Solar Energy, P.O. Box 6154, Chemistry Institute, University of Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil;2. DST/NRF Centre of Excellence in Strong Materials University of the Witwatersrand, PO Wits, 2050, Johannesburg, South Africa;3. Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO Wits, 2050, Johannesburg, South Africa;4. Department of Chemistry and Polymer Sciences, Stellenbosch University, Stellenbosch, 7600, Western Cape, South Africa;1. Aix-Marseille Université, CNRS, Laboratoire Chimie Environnement, FRE 3416, (Case 29), 3 place Victor Hugo, F - 13331 Marseille Cedex 3, France;2. Physikalische und Theoretische Chemie/FB C, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany |
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| Abstract: | The surface-phase reaction products of dihydromyrcenol (2,6-dimethyl-7-octen-2-ol) with ozone (O3), air, or nitrogen (N2) on silanized glass, glass and vinyl flooring tile were investigated using the recently published FACS (FLEC (Field and Laboratory Emission Cell) Automation and Control System). The FACS was used to deliver ozone (100 ppb), air, or N2 to the surface at a specified flow rate (300 mL min?1) and relative humidity (50%) after application of a 2.0% dihydromyrcenol solution in methanol. Oxidation products were detected using the derivatization agents: O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride (PFBHA) and N,O-bis(trimethysilyl)trifluoroacetamide (BSTFA). The positively identified reaction products were glycolaldehyde, 2,6-dimethyl-5-heptenal, and glyoxal. The proposed oxidation products based on previously published VOC/O3 reaction mechanisms were: 2,6-dimethyl-4-heptenal, 6-methyl-7-octen-2-one and the surface-specific reaction products: 6-methyl-6-hepten-2-one, 6-methyl-5-hepten-2-one, and 6-hydroxy-6-methylheptan-2-one. Though similar products were observed in gas-phase dihydromyrcenol/O3 reactions, the ratio, based on peak area, of the reaction products was different suggesting stabilization of larger molecular weight species by the surface. Emission profiles of these oxidation products over 72 h are also reported. |
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