Rigid Biphenyl and Tetraphenylelement Linker Scaffolds for Superior Immobilized Catalysts

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。无机、生物无机和有机金属化学项目支持德克萨斯农工大学Janet Bluemel教授合成新一代连接剂的研究，用于将催化剂固定在氧化物载体上。新的4,4'-双膦联苯和对四膦四苯基元素连接剂包含刚性骨架，防止膦基团和结合的配合物弯曲到支撑体表面并分解。这些四苯基支架为每个表面结合位点提供多达三个金属配位位点，从而获得最佳的表面覆盖率。固体核磁共振用于测量它们在表面的平移和进动型迁移率。特别注意的是[（联苯）- r2pet]+- o -{氧化物支持}键，因为这是第一次可以探测离子键的“柔韧性”。刚性磷化氢连接剂被并入用于烯烃氢化和硅氢化的金属催化剂中。学生将接受国际和行业合作的跨学科培训。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The Inorganic, Bioinorganic and Organometallic Chemistry Program supports the research of Professor Janet Bluemel of Texas A&M University to synthesize a new generation of linkers for the immobilization of catalysts on oxide supports. New 4,4'-bisphosphine biphenyl and p-tetraphosphine tetraphenyl-element linkers incorporate rigid backbones which prevent the phosphine groups and the bound complexes from bending down to the surface of the support and decomposing. These tetraphenyl-element scaffolds offer up to three metal coordination sites per surface binding site, so that optimal surface coverages are obtained. Solid-state NMR is used to measure their translational and precession-type mobility on the surface.Special attention is given to the [(biphenyl)-R2PEt]+-O-{oxide support} linkage, as this is the first time one can probe the "flexibility" of an ionic bond. The rigid phosphine linkers are incorporated into metal catalysts for olefin hydrogenation and hydrosilylation. Students will receive interdisciplinary training with both internationally and industrially collaborative efforts.