Soluble Transition-Metal Chalcogenides

由于过渡金属硫族化合物在超导材料、电池材料和加氢加工催化剂等方面的许多技术应用，该研究具有重要意义。计划研究可溶性过渡金属硫族化合物（S, Se， Te的化合物）的某些方面，以期发展一种与固态研究相补充的化学。特别建议集中研究早期过渡金属硒化物和碲化物。这些未知离子的合成策略包括：Nb和Ta的固相反应；这些反应可用于合成相应的碲化物。要研究的反应化学包括酸化、加热和与单氧根以及与无机和有机氧根的相互作用。提出了用Se-77核磁共振技术对溶液中的硒化物进行表征，并用衍射方法对溶液中分离的物质进行表征。从溶液中制备的化合物将与通过高温固相反应制备的化合物提供有趣的化学和结构对比。

The research is important because of the many technological applications of transition-metal chalcogenides such as superconducting materials, battery materials and hydroprocessing catalysts. It is planned to investigate certain aspects of soluble transition- metal chalcogenides (compounds of S, Se, Te) with a view toward developing a chemistry that is complementary to the solid-state efforts. In particular, it is proposed to concentrate on early transition metal selenides and tellurides. Synthetic strategies for these unknown ions include, for the case of Nb and Ta, solid-state reactions; these reactions may be applicable to the synthesis of the corresponding tellurides. The reaction chemistry to be studied includes acidification, heating, and interactions with simple chalcogens as well as with inorganic and organic chalcogens. The use of Se-77 NMR techniques for characterization of the selenides in solution and diffraction methods for the characterization of species isolated from solution is proposed. The compounds prepared from solution will provide interesting chemical and structural contrasts to those compounds that have been prepared by high-temperature solid-state reactions.