Molecular, Cluster, and Solid State Lanthanide Compounds With Electropositive Ligands

这项由无机化学、生物无机化学和金属有机化学项目颁发的奖项支持罗格斯大学化学系John G.Brennan博士的研究，他致力于对稀土(Ln)分子、团簇和与更具正电性的硫族(E=S，Se，Te)有直接键的固态材料的合成和表征进行全面研究。分子、团簇和固体的物理性质之间的关系将被确定，重点放在理解性质如何作为系统维度的函数而演变。分子、簇合物和固态材料的合成方法将会被开发出来。这些化合物作为化学试剂很有兴趣，因为Ln-Te(R)键很容易被破坏。第二个有待开发的领域是合成具有特别有用的含硒叶基团的Ln化合物，这也提供了在团簇化学中有用的甲苯溶解性。最后，含硒配体的挥发性Ln化合物也是目标化合物。这些研究旨在了解Ln化合物的化学和物理性质是如何随着颗粒大小的变化而演变的。这个多学科的项目将为本科生和研究生提供广泛的材料合成和表征技术的接触，并要求学生考虑对实验设计的实际和智力贡献。这项研究通过提供一类全新的潜在路易斯酸催化剂、还原剂或聚合引发剂，对有机化学产生了影响。所提出的化合物也是将Ln离子掺杂到硫属半导体或玻璃中的有用来源，这在平板显示器和光纤的制造中具有重要的意义。这种化学也可以作为一种低温(从而低成本)的方法来开发环境可接受的红橙色颜料，从而减少对Cd/Hg基材料的需求。

This award by the Inorganic, Bioinorganic and Organometallic Chemistry program supports research by Dr. John G. Brennan, Department of Chemistry, Rutgers University to undertake a comprehensive investigation into the synthesis and characterization of lanthanide (Ln) molecules, clusters, and solid-state materials with direct bonds to the more electropositive chalcogens ( E = S, Se, Te). Relationships between the physical properties of molecules, clusters, and solids will be determined, with an emphasis placed on understanding how properties evolve as a function of system dimensionality. Synthetic methods leading to facile interconversion of molecular, cluster, and solid-state materials will be developed. These compounds are of interest as chemical reagents because the Ln-Te(R) bond is so readily disrupted. A second area to be developed is the synthesis of Ln compounds with particularly useful selenium-containing leaving groups, which also impart toluene solubility that is useful in cluster chemistry. Finally, volatile Ln compounds with selenium ligands are also targeted. These studies are designed to provide an understanding of how the chemical and physical properties of Ln compounds evolve as a function of particle size. This multidisciplinary project will provide undergraduate and graduate students with a broad exposure to materials synthesis and characterization techniques and requires students to consider both practical and intellectual contributions to experimental design. This research impacts on organic chemistry by providing a totally new class of potential Lewis acid catalysts, reducing agents, or polymerization initiators. The proposed compounds are also useful sources for doping Ln ions into chalcogenido semiconductors or glasses, which have important implications in the manufacture of flat panel displays and optical fibers. The chemistry can also be developed as a low temperature (and thus low cost) approach to environmentally acceptable red-orange pigments that reduce the demand for Cd/Hg based materials.