作业帮英语翻译十分感激!The valence stability of tin in its complexes with
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英语翻译
十分感激!
The valence stability of tin in its complexes with 1-hydroxyethylene-diphosphonate (HEDP) and with N,N’,N’-trimethylenephosph-onate-polyethyleneimine (PEI-MP) was investigated.With particular interest in the possible interconversion between Sn2+ and Sn4+,the complexes were monitored with the aid of 31P NMR spectroscopy.The extent of complex formation with both ligands was evaluated for systems with tin in their respective oxidation states.The Sn2+ -complexes underwent initial,but limited oxidation upon preparation,and beyond which were rather stable,irrespective of pH or time.Both Sn2+- and Sn4+-complexes were found to exist in solution without change.Oxidation of Sn2+ was achieved by addition of hydrogen-peroxide and was partially reversed by the addition of glutathione (GSH).The amount of H2O2 needed for complete oxidation of the Sn2+- into Sn4+-complexes was determined for both ligands,as well as the time taken for that oxidation.
十分感激!
The valence stability of tin in its complexes with 1-hydroxyethylene-diphosphonate (HEDP) and with N,N’,N’-trimethylenephosph-onate-polyethyleneimine (PEI-MP) was investigated.With particular interest in the possible interconversion between Sn2+ and Sn4+,the complexes were monitored with the aid of 31P NMR spectroscopy.The extent of complex formation with both ligands was evaluated for systems with tin in their respective oxidation states.The Sn2+ -complexes underwent initial,but limited oxidation upon preparation,and beyond which were rather stable,irrespective of pH or time.Both Sn2+- and Sn4+-complexes were found to exist in solution without change.Oxidation of Sn2+ was achieved by addition of hydrogen-peroxide and was partially reversed by the addition of glutathione (GSH).The amount of H2O2 needed for complete oxidation of the Sn2+- into Sn4+-complexes was determined for both ligands,as well as the time taken for that oxidation.
在1-羟基乙烯二磷酸盐和NNN-三甲基三甲基磷酸聚醚酰亚胺亚与锡的络合物中,锡的共价稳定性是研究的对象.对于研究Sn2+和Sn4+的变换问题的普遍兴趣,这种络合物在31P核磁共振光谱仪上被成像.络合物中两种配位基能够形成络合物的区域范围可用来评估锡与其相应的氧化价位.在不考虑酸碱度和时间的情况下,Sn2+络合物最初被氧化但是受到准备条件限制,继而应会更加稳定.Sn2+和Sn4+都可以在溶液中以不带电性的形式存在.对于Sn2+的氧化可以通过添加双氧水来实现,这种氧化通过添加谷光甘肽被部分抵消.两种配位基和氧化过程所用的时间决定了氧化过程中双氧水的用量.
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