Synthetic, Structural, and Mechanistic Studies of Monomeric Alkyl, Hydride, Sub-Valent, and Multiply Bonded Derivatives of the s-and p-Block Elements

无机化学、生物无机化学和金属有机化学项目的这一奖项支持哥伦比亚大学化学系的Gerard F.R.Parkin博士对主族化合物的研究。将进行合成、结构、机理和热力学研究，以提供对主要基团(例如，Al、Ga、Ge、In、Sn、Tl)及其潜在应用的全面和基本的了解。重点将放在金属-烷基和金属-硫化物络合物以及金属-主族多键的能量学上。一系列新的、结构相似的化合物将用空间控制的配体来制备。要使用的配体包括聚吡唑基氢硼酸酯、三(咪唑基)膦和四氮杂(14)轮烯。所创造的空间环境将能够支持单体烷基、氢化物、硫醇、亚价和多键硫化物和硫烟酸衍生物。硫族元素包括S、Se和Te；硫族元素包括P和Bi。主族元素的络合物被用作陶瓷材料、半导体和超导体的前体。例如，二元II-VI硫族化合物(例如，ZnSe和ZnTe)和III-V化合物(例如，GaAs和InP)被用于光伏能量转换器件、发光二极管、固态激光器和光开关。陶瓷和由硫化物和锡石形成的多孔固态材料也在使用中。在这项研究中，将制备和表征结构可控的新的分子化合物，以便能够更好地将这些化合物的化学与含有它们的材料的性质相关联。

This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research on main group compounds by Dr. Gerard F. R. Parkin of the Chemistry Department, Columbia University. Synthetic, structural, mechanistic and thermodynamic studies will be undertaken to provide a comprehensive and fundamental understanding of main group (e.g., Al, Ga, Ge, In, Sn, Tl) complexes and their potential applications. Emphasis will be placed on metal-alkyl and metal-chalcogenide complexes and on the energetics of metal-main group multiple bonds. A series of new, structurally analogous compounds will be prepared using sterically-controlling ligands. The ligands to be used include poly(pyrazolyl)hydroborate, tris(imidazolyl)phosphine, and tetraaza(14)annulene. The steric environments created will be capable of supporting monomeric alkyl, hydride, chalcogenolate, subvalent, and multiply bonded chalcogenide and pnictide derivatives. Chalcogens S, Se, and Te are included in the study; pnictogens include P and Bi. Complexes of main group elements find application as precursors for ceramic materials, semiconductors, and superconductors. For example, binary II-VI chalcogenides (e.g., ZnSe and ZnTe) and III-V pnictides (eg., GaAs and InP) are used in photovoltaic energy conversion devices, light-emiting diodes, solid-state lasers and optical switches. Ceramics and porous solid state materials formed from chalcogenides and pnictides are also in use. In this study, new molecular compounds of controlled structure will be prepared and characterized in order to better be able to correlate the chemistry of these compounds with the properties of materials containing them.