Spectroscopic studies of aluminum and gallium complexes with oxalate and malonate in aqueous solution
作者:Maria Clausén、Lars-Olof Öhman、Kristina Axe、Per Persson
DOI:10.1016/s0022-2860(03)00026-7
日期:2003.3
number of ligands coordinated to Ga(III) was varied. Based on the very close resemblance of IR spectra of oxalate and malonate complexes of Al(III), and the corresponding complexes of Ga(III), it is believed that the local structures of the Al(III) complexes are similar to those of the Ga(III) complexes in terms of ligand coordination modes and distortions. This conclusion was corroborated by results from
通过 Ga K-edge EXAFS 光谱研究了草酸和丙二酸水溶液中 Ga(III) 的局部结构。不管配位体的数量和类型如何,EXAFS 结果显示由六个氧原子组成的非常规则的第一配位壳。来自更远原子的散射路径显示草酸盐和丙二酸盐都形成单核螯合物结构,其中每个羧酸根基团的一个氧与 Ga(III) 结合。同样,随着与 Ga(III) 配位的配体数量的变化,键距的变化很小,配位模式也没有变化。基于 Al(III) 的草酸和丙二酸配合物以及 Ga(III) 的相应配合物的红外光谱非常相似,据信,就配体配位模式和畸变而言,Al(III)配合物的局部结构与Ga(III)配合物的局部结构相似。这一结论得到了理论频率计算结果的证实。