Atmospheric aqueous phase radical chemistry of the isoprene oxidation products methacrolein, methyl vinyl ketone, methacrylic acid and acrylic acid – kinetics and product studies
作者:Luisa Schöne、Janine Schindelka、Edyta Szeremeta、Thomas Schaefer、Dirk Hoffmann、Krzysztof J. Rudzinski、Rafal Szmigielski、Hartmut Herrmann
DOI:10.1039/c3cp54859g
日期:——
the hydroxyl radical followed by sulfate and nitrate radicals. For methacrolein and methyl vinyl ketone the following rate constants have been determined at 298 K: k(OH+methacrolein) = (9.4 ± 0.7) × 109 M−1 s−1, k(OH+methyl vinyl ketone) = (7.3 ± 0.5) × 109 M−1 s−1, k(NO3+methacrolein) = (4.0 ± 1.0) × 107 M−1 s−1, k(NO3+methyl vinyl ketone) = (9.7 ± 3.4) × 106 M−1 s−1, k(SO4−+methacrolein) = (9.9 ± 4
通过激光闪光光解技术和反向速率动力学方法研究了异戊二烯氧化产物异丙烯醛,甲基乙烯基酮,甲基丙烯酸和丙烯酸与水溶液中的羟基,硝酸根和硫酸根阴离子反应的动力学和机理。 。高效液相色谱/质谱法用于产品分析。动力学研究表明,羟基自由基的活性最高,其次是硫酸根和硝酸根。对于甲基丙烯醛和甲基乙烯基酮,已确定以下速率常数为298 K:k (OH +甲基丙烯醛) =(9.4±0.7)×10 9 M -1 s -1,k(OH +甲基乙烯基酮) =(7.3±0.5)×10 9 M -1 s -1, k (NO 3 +甲基丙烯醛) =(4.0±1.0)×10 7 M -1 s -1, k (NO 3 +甲基乙烯基酮) =(9.7±3.4)×10 6中号-1小号-1, ķ (SO 4 - +甲基丙烯醛) =(9.9±4.9)×10 7中号-1小号-1和ķ (SO 4 - +甲基乙烯基酮)=(1.0±0.2)×10