| Title: | Photoinduced Release of Volatile Organic Compounds from Fatty Alcohols at the Air-Water Interface: The Role of Singlet Oxygen Photosensitized by a Carbonyl Group |
| Author(s): | Lin J; Dai Q; Zhao H; Cao H; Wang T; Wang G; Chen C; |
| Address: | "Beijing Engineering Research Center of Process Pollution Control, CAS Key Laboratory of Green Process and Engineering, Innovation Academy for Green Manufacture, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. University of Chinese Academy of Sciences, Beijing 100049, P. R. China. Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China. Department of Chemistry School of Science, Tianjin University, Tianjin 300072, China. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Photoinduced interfacial release of volatile organic compounds (VOCs) from surfactants receives emerging concerns. Here, we investigate the photoreaction of 1-nonanol (NOL) as a model surfactant at the air-water interface, especially for the important role of (1)O(2) in the formation of VOCs. The production of VOCs is real-time quantitated. The results indicate that the oxygen content apparently affects the total yields of VOCs during the photoreaction of interfacial NOL. The photoactivity of NOL is about 8 times higher under air than that under nitrogen, which is mainly attributed to the generation of (1)O(2). Additionally, the production of VOCs increased by about 4 times with the existence of the air-water interface. Quenching experiments of (1)O(2) also illustrate the contribution of (1)O(2) to VOC formation, which could reach more than 95% during photoirradiation of NOL. Furthermore, density functional theory calculations show that (1)O(2) generated via energy transfer of photosensitizers can abstract two hydrogen atoms from a fatty alcohol molecule. The energy barrier of this reaction is 72.3 kJ/mol, and its reaction rate coefficient is about 2.742 s(-1) M(-1). (1)O(2) significantly promotes photoinduced oxidation of fatty alcohols and VOC formation through hydrogen abstraction, which provides a new insight into the interfacial photoreaction" |
| Keywords: | *Air Pollutants Fatty Alcohols Oxidation-Reduction Singlet Oxygen *Volatile Organic Compounds Water air-water interface electron spin resonance fatty alcohol hydrogen abstraction photochemical reaction volatile organic compounds; |
| Notes: | "MedlineLin, Jingyi Dai, Qin Zhao, He Cao, Hongbin Wang, Tianyu Wang, Guangwei Chen, Chuncheng eng Research Support, Non-U.S. Gov't 2021/05/11 Environ Sci Technol. 2021 Jul 6; 55(13):8683-8690. doi: 10.1021/acs.est.1c00313. Epub 2021 May 9" |
