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Syntheses, Structures, and Comprehensive NMR Spectroscopic Investigations of Hetero-Chalcogenidometallates: The Right Mix toward Multinary Complexes

机译:杂硫族金属化物的合成,结构和全面的NMR光谱研究:向多元配合物的正确混合

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摘要

Aqueous solutions of ternary ortho-chalcogenidostannate anions [SnE_(4-x)~1E_x~2]~(4-)(E1, E2=S, Se, Te) have been generated following different routes that all lead to equilibria of all possible permutations of binary and ternary anions. This has been rationalized by means of NMR studies that can be explained by calculations using density functional theory (DFT) methods.Thus, if one reacts such solutions with transition-metal ions, quaternary M/Sn/ E~1/E~2 anions are obtained, which exhibitcoordination by different ternary chalcogenidostannate ligands. The electronic excitation energies of the corresponding alkali metal salts lie between the Eg values of compounds containing either M/Sn/E~1 or M/Sn/E~2 anions. In this way, we provide a simple approach toward a library of semiconductor compounds with finely-tuned optoelectronic properties.
机译:遵循以下路线生成了三元邻硫氰酸根锡酸酯阴离子[SnE_(4-x)〜1E_x〜2]〜(4-)(E1,E2 = S,Se,Te)的水溶液,所有这些都会导致所有可能的平衡二元和三元阴离子的排列。这已经通过NMR研究得以合理化,而NMR研究可以通过使用密度泛函理论(DFT)方法进行计算来解释,因此,如果这样的溶液与过渡金属离子发生反应,则季铵M / Sn / E〜1 / E〜2阴离子获得了由不同的三硫属元素锡酸酯三元配体表现出配位的化合物。相应的碱金属盐的电子激发能介于包含M / Sn / E〜1或M / Sn / E〜2阴离子的化合物的Eg值之间。通过这种方式,我们为具有精细调整的光电特性的半导体化合物库提供了一种简单的方法。

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