New Strategies towards Inorganic-Organic Materials with Extended pi-Systems

凯斯西储大学化学系John Protasiewicz得到无机化学、生物无机化学和有机金属化学计划的支持，研究含有多个磷键的新化合物。该项目有三个主要目标：1)开发新的更好的方法来合成磷杂烯、双膦和其他P=X键；2)合成和研究含有几个低配位主族元素的新配体；3)表征具有有趣的光学和电学性质的扩展体系。在亚膦前体的热或光化学生成之后，将研究亚膦化合物的基本化学。此外，亚膦前体将被用来构建离散的低聚物，并最终形成具有所需性能的聚合物。含磷的聚苯乙烯醚(PPV)和聚苯乙烯醚(PPE)是两种待制备和研究的聚合物。共轭低聚物和聚合物在有机发光二极管(OLED)、分子导线和分子开关等方面具有重要的技术意义。将磷或相关的主族元素加入到这些聚合物的主链中可以在许多方面改变其性质。受过该项目培训的学生和研究人员将在无机和有机金属合成方法以及聚合物化学和分子电子学等交叉学科领域获得广泛的知识。

John Protasiewicz, Department of Chemistry, Case Western Reserve University, is supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program to investigate new compounds containing multiple bonds to phosphorus. The project has three main goals: 1) to develop new and better methodologies for the synthesis of phosphaalkenes, diphosphenes and other P=X bonds; 2) synthesize and study new ligands containing several low coordinate main group elements; and 3) characterize extended systems having interesting optical and electronic properties. The fundamental chemistry of phosphinidenes will be examined following their thermal or photochemical generation from phosphinidene precursors. In addition, phosphinidene precursors will be used to construct discrete oligomers and ultimately polymers with desireable properties. Phosphorus-containing analogs to poly(phenylenevinylenes), PPV, and poly(phenyleneethylenes), PPE, are two of the polymers to be prepared and studied.Conjugated oligomers and polymers are technologically important as organic light-emitting diodes (OLEDs), molecular wires and molecular switches. Incorporating phosphorus or related main group elements into the backbone of these polymers can change the properties in many ways. Students and researchers trained to work in this project will gain a broad knowledge in inorganic and organometallic synthetic methods as well as interdisciplinary areas such as polymer chemistry and molecular electronics.