Silicon Mediated Syntheses of Fluorophosphazenes and Other Fluorinated Compounds

9310389爱达荷大学的Shreve教授和Kirchmeier教授将在无机化学、生物无机化学和金属有机化学项目的支持下，研究氟磷腈的合成。虽然合成磷腈化学多年来一直是一个富有活力的研究领域，但氟磷腈类化合物却相对未被触及。Shreve和Kirchmeier将制备环磷腈和聚磷腈，其中氟原子既连接到骨架原子上，也连接到取代基上，如氟代烷氧化合物、氟苯氧化物和氟烷基。许多合成将利用含氟有机硅烷作为试剂将含氟基团引入到磷腈中。预计磷腈，已经是一类很有前途的化合物，将在其氟化形式下显示出更好的性能。有一类无机化合物，称为磷腈，从某种意义上说，它们类似于有机化合物，因为它们是围绕着连接的原子骨架构建的；然而，骨架不是碳原子，而是由交替的磷和氮原子组成。磷腈既可以作为离散分子制备，也可以作为聚合物制备，它们正在找到某些商业应用。正如特氟龙通过用氟原子取代氢与简单有机化合物有关，在本研究项目中，将制备一系列氟取代磷腈。将探索这些化合物的基本化学，但预计它们将显示出相对于其未加氟的同类化合物更好的性能。***

9310389 Shreeve Professors Shreeve and Kirchmeier of the University of Idaho will investigate the synthesis of fluorophosphazenes with support from the Inorganic, Bioinorganic, and Organometallic Chemistry Program. Although synthetic phosphazene chemistry has been a fertile area of research for many years, the fluorophosphazenes have been relatively untouched. Shreeve and Kirchmeier will prepare cyclophosphazenes as well as polyphosphazenes with fluorine atoms attached both to the skeletal atoms as well as to substituent groups such as fluoroalkoxides, fluorophenoxides, and fluoroalkyls. Many of the syntheses will take advantage of fluoro-organosilanes as reagents to introduce the fluoro-groups into the phosphazenes. It is anticipated that the phosphazenes, already a promising class of compounds, will display improved properties in their fluorinated forms. %%% There is a class of inorganic compounds, called the phosphazenes, which are similar to organic compounds in the sense that they are constructed around a skeleton of linked atoms; however, instead of carbon atoms the skeleton is made of alternating phosphorus and nitrogen atoms. Phosphazenes can be prepared both as discrete molecules and as polymers, and they are finding certain commercial applications. Just as Teflon is related to simple organic compounds through the replacement of hydrogen with fluorine atoms, in the present research project a series of fluorine-substituted phosphazenes will be prepared. The basic chemistry of these compounds will be explored, but it is anticipated that they will display improved properties relative to their unfluorinated relatives. ***