Environmentally Benign Immobilized Organometallic Acids

在这个由无机、生物无机和有机金属化学项目支持的环境友好型化学合成和加工项目中，犹他大学的学术化学家John Gladysz教授和埃克森公司研究实验室的工业化学家Istvan Horvath博士将承担新型固体酸催化剂的开发。这些酸性催化剂将基于固定在固体聚合物载体（如聚苯乙烯和Nafion）上的质子有机金属化合物。预计这些酸将表现出新的反应模式，包括酸性质子和金属中心。这些努力的成功可能导致生产比目前方法产生更少酸性废物的工艺。有机金属酸的固定化需要开发新的配体和将其连接到聚合物载体上的方法。聚苯乙烯将与含氟多齿有机膦或环戊二烯配体衍生，用于结合金属氢化物。替代体系将以Nafion为基础，Nafion已在磺酰胺基团上与供体基团衍生，使金属氢化物可以共价结合。新的组合物将通过红外和核磁共振光谱，哈米特酸的测量，以及通过筛选烷基化反应（如石油原料转化所需的那些反应）的催化活性来表征。大多数已知的工业化学制造过程都涉及某种类型的催化作用。这些催化过程中有许多都涉及到强酸的使用。那些使用可溶性酸的通常会产生大量高酸性废物，必须在处置前处理以降低其酸度。新的固相酸可能取代这些是非常可取的。该项目承担新材料的基础研究，最终为更环保的重要商品化学品生产提供基础。

In this Environmentally Benign Chemical Synthesis and Processing project, supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program, academic chemist, Professor John Gladysz of the University of Utah and industrial chemist, Dr. Istvan Horvath of Exxon Corporate Research Laboratory will undertake the development of new solid acid catalysts. These acid catalysts will be based upon protic organometallic compounds immobilized on solid polymeric supports such as polystyrene and Nafion. It is expected that these acids will exhibit new modes of reactivity that will involve both the acidic proton and the metal center. Success in these endeavors could result in processes that produce less acidic wastes than current methods. Immobilization of the organometallic acids will require the development of new ligands and methods for attaching them to the polymeric supports. Polystyrene will be derivatized with fluorinated polydentate organophosphine or cyclopentadienyl ligands, which will be used to bind metal hydride species. Alternative systems will be based upon Nafion, which has been derivatized at the sulfonamide group with donor groups such that metal hydride species can be covalently bound. New compositions will be characterized by infrared and NMR spectroscopies, by measurements of Hammett acidities, and by screening for catalytic activity in alkylation reactions such as those that are required for petroleum feedstock conversions. The majority of known industrial chemical manufacturing processes involve some type of catalysis. A large number of these catalytic processes involve the use of strong acids. Those that employ soluble acids often generate large quantities of highly acidic waste that must be treated to reduce its acidity prior to disposal. New solid-phase acids that may replace these are highly desirable. This project undertakes fundamental studies of new materials that ultimate provide the basis for more environmentally benign manufacture o f important commodity chemicals.