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Photolytic Transformation Products of Decabromodiphenyl Ethane (DBDPE)

机译:十溴二苯乙烷的光解转化产物(DBDPE)

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摘要

The photolytic transformation of decabromodiphenyl ethane-a current-use brominated flame retardant and major substitute of the structurally related decabromodiphenyl ether-was investigated in different solvents (toluene, dichloromethane, chlorobenzene, and benzyl alcohol). The transformation rate followed pseudo first order kinetics, with increasing half-life (t(1/2)) in the order of toluene (t(1/2) = 4.6 min), chlorobenzene (t(1/2) = 14.0 min), dichloromethane (t(1/2) = 27.9 min), and benzyl alcohol (t(1/2) approximate to 60 min). Formation and amount of transformation products varied depending on the solvent used. A detailed study of the hydrodebromination products allowed us to tentatively assign all three possible nonaBDPEs (BDPE 207, 208, and in benzyl alcohol only BDPE 206) and three predominant octaBDPE congeners (BDPE 197, 201, and 202). Next to the reported BDPEs, formation of several oxygen containing transformation products (OxyTPs), dominated by octabrominated OxyTP, was verified by GC-Orbitrap-HRMS analysis. Use of HPLC and Florisil column enabled the separation of OxyTPs and BDPEs, and the polybrominated OxyTPs were most likely tricyclic compounds with almost planar structure.
机译:在不同的溶剂(甲苯,二氯甲烷,氯苯和苯甲醇)中研究了十溴二苯乙烷(一种目前使用的溴化阻燃剂和结构相关的十溴二苯醚的主要替代品)的光解转化。转化速率遵循拟一级反应动力学,以甲苯(t(1/2)= 4.6分钟),氯苯(t(1/2)= 14.0分钟)的顺序增加半衰期(t(1/2)) ),二氯甲烷(t(1/2)= 27.9分钟)和苯甲醇(t(1/2)约60分钟)。转化产物的形成和量取决于所用溶剂而变化。对加氢溴化产物的详细研究使我们可以暂定分配所有三种可能的nonaBDPE(BDPE 207、208,仅在苯甲醇中为BDPE 206)和三个主要的八溴二苯醚同类物(BDPE 197、201和202)。除已报道的BDPE外,还通过GC-Orbitrap-HRMS分析验证了八溴代OxyTP占主导地位的几种含氧转化产物(OxyTPs)的形成。 HPLC和Florisil色谱柱的使用可以分离OxyTP和BDPE,而多溴化OxyTP最可能是具有几乎平面结构的三环化合物。

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  • 来源
    《Environmental Science & Technology》 |2019年第11期|6302-6309|共8页
  • 作者单位

    Univ Hohenheim, Inst Food Chem, Garbenstr 28, D-70599 Stuttgart, Germany;

    Univ Hohenheim, Inst Food Chem, Garbenstr 28, D-70599 Stuttgart, Germany;

    Univ Hohenheim, Inst Food Chem, Garbenstr 28, D-70599 Stuttgart, Germany;

    Univ Hohenheim, Inst Food Chem, Garbenstr 28, D-70599 Stuttgart, Germany;

    Univ Hohenheim, Inst Food Chem, Garbenstr 28, D-70599 Stuttgart, Germany|European Union Reference Lab EU RL Halogenated PO, D-79114 Freiburg, Germany;

    Univ Hohenheim, Inst Food Chem, Garbenstr 28, D-70599 Stuttgart, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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