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)提供资金的。无机化学、生物无机化学和金属有机化学计划支持德克萨斯农工大学的珍妮特·布鲁梅尔教授的研究，以合成用于将催化剂固定在氧化物载体上的新一代连接物。新的4，4‘-双膦联苯和对四膦四苯基元连接剂结合了刚性骨架，防止了膦基团和结合的络合物弯曲到载体表面并分解。这些四苯基元素支架为每个表面结合位置提供最多三个金属配位，从而获得最佳的表面覆盖率。固体核磁共振被用来测量它们在表面上的平移和进动类型的迁移率，特别关注[(联苯)-R2PEt]+-O-{氧化物支撑}键，因为这是人们第一次能够探测到离子键的“柔性”。将刚性膦连接体引入金属催化剂中，用于烯烃加氢和硅氢化反应。学生将在国际和行业合作的努力下接受跨学科培训。

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.