Formation of substances with humic-like fluorescence properties, upon photoinduced oligomerization of typical phenolic compounds emitted by biomass burning
Formation of substances with humic-like fluorescence properties, upon photoinduced oligomerization of typical phenolic compounds emitted by biomass burning
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DOI：
10.1016/j.atmosenv.2019.03.005
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发表时间：
2019-06
影响因子：
5
通讯作者：
D. Vione;A. Albinet;Francesco Barsotti;Majda Mekic;B. Jiang;C. Minero;M. Brigante;S. Gligorovski-
中科院分区：
文献类型：
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作者：
D. Vione;A. Albinet;Francesco Barsotti;Majda Mekic;B. Jiang;C. Minero;M. Brigante;S. Gligorovski-
在模拟阳光下的一些酚类化合物通常在环境空气中排放的生物质燃烧，即香草醛和乙酰丁香酮，产生的中间体与腐殖类荧光特性，可以同化为腐殖类物质（HULIS）的照射。证据是通过超高分辨率质谱法获得的低聚过程的发生，形成三聚体物种。相比之下，其他生物质燃烧化合物，如香草酸，间甲酚和愈创木酚的照射不产生HULIS型荧光或低聚物。我们认为，光解的生物质燃烧的化合物是一个潜在的HULIS源在大气中，如果相关的基板进行光诱导的低聚反应。
The irradiation under simulated sunlight of some phenolic compounds typically emitted in ambient air by biomass burning, namely vanillin and acetosyringone, yielded intermediates with humic-like fluorescence properties that can be assimilated to humic-like substances (HULIS). Evidence was obtained by ultra-high-resolution mass spectrometry of the occurrence of oligomerization processes up to the formation of trimeric species. In contrast, the irradiation of other biomass-burning compounds such as vanillic acid, m-cresol and guaiacol did not yield either HULIS-type fluorescence or oligomers. We suggest that the photolysis of biomass-burning compounds is a potential HULIS source in the atmosphere, if the relevant substrates undergo photoinduced oligomerization reactions.