An EXAFS study on the adsorption structure of phenyl-substituted organoarsenic compounds on ferrihydrite.
An EXAFS study on the adsorption structure of phenyl-substituted organoarsenic compounds on ferrihydrite.
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DOI：
10.1016/j.jcis.2013.10.006
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发表时间：
2014-02
影响因子：
9.9
通讯作者：
Masato Tanaka;Yoko S. Togo;N. Yamaguchi;Y. Takahashi
中科院分区：
文献类型：
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作者：
Masato Tanaka;Yoko S. Togo;N. Yamaguchi;Y. Takahashi
利用扩展X射线吸收精细结构（EXAFS）分析了单取代和二苯基取代有机砷化合物（PAA和DPAA）在水铁矿表面的吸附结构，结果表明PAA和DPAA与水铁矿形成内球复合物，而不考虑其庞大的官能团.此外，EXAFS对两种As单键Fe壳层的拟合表明，两种类型的内球络合物模式共存，即双齿-双核和单齿表面络合物。
Adsorption structures of mono- and diphenyl substituted organoarsenic compounds (PAA and DPAA, respectively) on ferrihydrite were analyzed by extended X-ray absorption fine structure (EXAFS), which suggested that PAA and DPAA form inner-sphere complexes with ferrihydrite regardless of their bulky functional groups. In addition, coexistence of two types of inner-sphere complex modes, i.e. bidentate–binuclear and monodentate surface complexes was suggested by EXAFS fitting with two type of the Assingle bondFe shell.