期刊
BMC CHEMISTRY
卷 16, 期 1, 页码 -出版社
BMC
DOI: 10.1186/s13065-022-00800-6
关键词
1; 3-butadiene; Photolysis; Reaction kinetics; Ultraviolet irradiation
资金
- National Natural Science Foundation of China [21776050]
- National Institute of Advanced Industrial Science and Technology Fellowship of Japan
- Major Science and Technology Special Project in Guangxi [AA17204087-20]
- Innovation training program of Guangxi Zhuang Autonomous Region [R2030042001]
In this study, the photolysis reaction of 1,3-butadiene was investigated using UV-vis spectrophotometry. The results showed that ultraviolet irradiation could accelerate the photolysis reaction rate of 1,3-butadiene. Gas chromatography-mass spectrometry was used to determine the reaction products and identify the reaction pathways.
The reaction process of gaseous 1,3-butadiene following ultraviolet irradiation at the temperature range from 298 to 323 K under nitrogen atmosphere was monitored by UV-vis spectrophotometry. A gaseous mini-reactor was used as a reaction vessel and could be directly monitored in a UV-vis spectrophotometer. We investigated the reactivity and kinetics of 1,3-butadiene under non-UV and UV irradiation to evaluate its photochemical stability. A second-order kinetic model with 50.48 kJ center dot mol(-1) activation energy fitted the reaction data for non-UV irradiation, whereas a first-order kinetic model was appropriate in the case of UV irradiation with activation energies of 19.92-43.65 kJ mol(-1). This indicates that ultraviolet light could accelerate the photolysis reaction rate of 1,3-butadiene. In addition, the reaction products were determined using gas chromatography-mass spectrometry (GC-MS), and the reaction pathways were identified. The photolysis of 1,3-butadiene gave rise to various volatile products by cleavage and rearrangement of single C-C bonds. The differences between dimerization and dissociation of 1,3-butadiene under ultraviolet irradiation were elucidated by combining experimental and theoretical methods. The present findings provide fundamental insight into the photochemistry of 1,3-butadiene compounds.
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