Reductive debromination of nonabrominated diphenyl ethers by sodium borohydride and identification of octabrominated diphenyl ether products.
Reductive debromination of nonabrominated diphenyl ethers by sodium borohydride and identification of octabrominated diphenyl ether products.
复制标题
DOI：
10.1016/j.chemosphere.2010.11.022
复制
发表时间：
2011-02
期刊：
影响因子：
8.8
通讯作者：
L. Granelli;L. Eriksson;M. Athanasiadou;A. Bergman
中科院分区：
文献类型：
--
作者：
L. Granelli;L. Eriksson;M. Athanasiadou;A. Bergman
建立了一种研究高溴化联苯醚(BDEs)还原转化的方法。该方法的开发是一个更广泛项目的一部分，该项目将用于确定环境污染物对还原条件的敏感性，试图创建一种确定化学品持久性的方案。本文研究了BDE-206、-207和-208三种非溴代二苯醚的还原脱溴转化产物。用硼氢化钠研究了非aBDEs的还原脱溴反应。在两个时间点收集转化产物，并用GC-MS对鉴定的产物进行定量。非aBDEs的还原主要导致脱溴产物，主要是八溴二苯醚。这三个非消除的DES给出了与异构体相关的转化产物模式。BDE-207和BDE-208在初始反应步骤中显示出邻位脱溴倾向，而BDE-206在初始脱溴位置之间没有区别。所有三个非溴化DES都在完全溴化的DE环上表现出较好的初始脱溴反应。
A method was developed to study reductive transformation of highly brominated diphenyl ethers (BDEs). The method development is a part of a broader project where it will be used to determine the susceptibility of environmental pollutants to reductive conditions, in an attempt to create a scheme for determination of chemical’s persistence. This paper focuses on identification of octabrominated diphenyl ether transformation products from reductive debromination of the three nonabrominated diphenyl congeners (nonaBDE), BDE-206, -207 and -208. Sodium borohydride was used to explore the reductive debromination of the nonaBDEs. The transformation products were collected at two time-points and identified products were quantified by GC–MS. The reduction of the nonaBDEs lead primarily to debrominated products, mainly octaBDEs. The three nonabrominated DEs gave isomer-related transformation product patterns. BDE-207 and BDE-208 showed a propensity for ortho-debromination in the initial reaction step, while no discrimination between initial debromination positions was seen for BDE-206. All three nonabrominated DEs displayed a preferred initial debromination on the fully brominated DE ring.