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

凯斯西储大学化学系的John Protasiewicz在无机、生物无机和有机金属化学项目的支持下，研究含有多个与磷键的新化合物。该项目有三个主要目标：1)开发新的和更好的方法来合成磷烯烃、二膦烯和其他P=X键；2)合成和研究含有多个低配位主基元素的新配体；3)描述具有有趣的光学和电子特性的扩展系统。从磷脂前体热化学或光化学生成磷脂后，将考察磷脂的基本化学性质。此外，磷酸二烯前体将用于构建离散的低聚物和最终具有理想性能的聚合物。聚苯乙烯的含磷类似物PPV和聚苯乙烯的含磷类似物PPE是将要制备和研究的两种聚合物。共轭低聚物和聚合物在技术上很重要，如有机发光二极管（oled）、分子线和分子开关。在这些聚合物的骨架中加入磷或相关的主族元素可以在许多方面改变其性质。参加本项目的学生和研究人员将获得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跨学科领域的广泛知识。

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.