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

这个无机、生物无机和有机金属化学项目的奖项支持哥伦比亚大学化学系的Gerard F. R. Parkin博士对主要基团化合物的研究。将进行合成、结构、机理和热力学研究，以提供对主要基团（如Al、Ga、Ge、In、Sn、Tl）配合物及其潜在应用的全面和基本的了解。重点将放在金属-烷基配合物和金属-硫族配合物以及金属-主基团多键的能量学上。利用立体控制配体将制备一系列新的结构类似的化合物。要使用的配体包括聚（吡唑基）氢硼酸盐、三（咪唑基）膦和四氮杂（14）环烯。所创造的空间环境将能够支持单体烷基、氢化物、硫代酚酸酯、亚价和多键硫代酚和嘌呤衍生物。硫原S、Se和Te也在研究范围内；致癌物包括P和Bi。主族元素配合物可作为陶瓷材料、半导体和超导体的前体。例如，二元II-VI硫属化合物（如ZnSe和ZnTe）和III-V嘌呤（如ZnSe和ZnTe）。应用于光伏能量转换器件、发光二极管、固态激光器和光开关等领域。由硫族化合物和羟基形成的陶瓷和多孔固体材料也在使用中。在本研究中，将制备和表征结构可控的新分子化合物，以便更好地将这些化合物的化学性质与含有它们的材料的性质联系起来。

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.